Vulnerabilities

134 via 279 paths

Dependencies

105

Source

Group 6 Copy Created with Sketch. Docker

Target OS

ubuntu:18.04
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Severity
  • 6
  • 55
  • 73
Status
  • 134
  • 0
  • 0

high severity

Buffer Overflow

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.1-1ubuntu2.1~18.04.4 and openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.13

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 openssl@1.1.1-1ubuntu2.1~18.04.4
  • Introduced through: concourse/concourse@5.5.5 openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

In order to decrypt SM2 encrypted data an application is expected to call the API function EVP_PKEY_decrypt(). Typically an application will call this function twice. The first time, on entry, the "out" parameter can be NULL and, on exit, the "outlen" parameter is populated with the buffer size required to hold the decrypted plaintext. The application can then allocate a sufficiently sized buffer and call EVP_PKEY_decrypt() again, but this time passing a non-NULL value for the "out" parameter. A bug in the implementation of the SM2 decryption code means that the calculation of the buffer size required to hold the plaintext returned by the first call to EVP_PKEY_decrypt() can be smaller than the actual size required by the second call. This can lead to a buffer overflow when EVP_PKEY_decrypt() is called by the application a second time with a buffer that is too small. A malicious attacker who is able present SM2 content for decryption to an application could cause attacker chosen data to overflow the buffer by up to a maximum of 62 bytes altering the contents of other data held after the buffer, possibly changing application behaviour or causing the application to crash. The location of the buffer is application dependent but is typically heap allocated. Fixed in OpenSSL 1.1.1l (Affected 1.1.1-1.1.1k).

Remediation

Upgrade Ubuntu:18.04 openssl to version 1.1.1-1ubuntu2.1~18.04.13 or higher.

References

high severity

Loop with Unreachable Exit Condition ('Infinite Loop')

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.1-1ubuntu2.1~18.04.4 and openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.15

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 openssl@1.1.1-1ubuntu2.1~18.04.4
  • Introduced through: concourse/concourse@5.5.5 openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

The BN_mod_sqrt() function, which computes a modular square root, contains a bug that can cause it to loop forever for non-prime moduli. Internally this function is used when parsing certificates that contain elliptic curve public keys in compressed form or explicit elliptic curve parameters with a base point encoded in compressed form. It is possible to trigger the infinite loop by crafting a certificate that has invalid explicit curve parameters. Since certificate parsing happens prior to verification of the certificate signature, any process that parses an externally supplied certificate may thus be subject to a denial of service attack. The infinite loop can also be reached when parsing crafted private keys as they can contain explicit elliptic curve parameters. Thus vulnerable situations include: - TLS clients consuming server certificates - TLS servers consuming client certificates - Hosting providers taking certificates or private keys from customers - Certificate authorities parsing certification requests from subscribers - Anything else which parses ASN.1 elliptic curve parameters Also any other applications that use the BN_mod_sqrt() where the attacker can control the parameter values are vulnerable to this DoS issue. In the OpenSSL 1.0.2 version the public key is not parsed during initial parsing of the certificate which makes it slightly harder to trigger the infinite loop. However any operation which requires the public key from the certificate will trigger the infinite loop. In particular the attacker can use a self-signed certificate to trigger the loop during verification of the certificate signature. This issue affects OpenSSL versions 1.0.2, 1.1.1 and 3.0. It was addressed in the releases of 1.1.1n and 3.0.2 on the 15th March 2022. Fixed in OpenSSL 3.0.2 (Affected 3.0.0,3.0.1). Fixed in OpenSSL 1.1.1n (Affected 1.1.1-1.1.1m). Fixed in OpenSSL 1.0.2zd (Affected 1.0.2-1.0.2zc).

Remediation

Upgrade Ubuntu:18.04 openssl to version 1.1.1-1ubuntu2.1~18.04.15 or higher.

References

high severity

Access of Resource Using Incompatible Type ('Type Confusion')

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.1-1ubuntu2.1~18.04.4 and openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.21

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 openssl@1.1.1-1ubuntu2.1~18.04.4
  • Introduced through: concourse/concourse@5.5.5 openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

There is a type confusion vulnerability relating to X.400 address processing inside an X.509 GeneralName. X.400 addresses were parsed as an ASN1_STRING but the public structure definition for GENERAL_NAME incorrectly specified the type of the x400Address field as ASN1_TYPE. This field is subsequently interpreted by the OpenSSL function GENERAL_NAME_cmp as an ASN1_TYPE rather than an ASN1_STRING.

When CRL checking is enabled (i.e. the application sets the X509_V_FLAG_CRL_CHECK flag), this vulnerability may allow an attacker to pass arbitrary pointers to a memcmp call, enabling them to read memory contents or enact a denial of service. In most cases, the attack requires the attacker to provide both the certificate chain and CRL, neither of which need to have a valid signature. If the attacker only controls one of these inputs, the other input must already contain an X.400 address as a CRL distribution point, which is uncommon. As such, this vulnerability is most likely to only affect applications which have implemented their own functionality for retrieving CRLs over a network.

Remediation

Upgrade Ubuntu:18.04 openssl to version 1.1.1-1ubuntu2.1~18.04.21 or higher.

References

high severity

NULL Pointer Dereference

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.1-1ubuntu2.1~18.04.4 and openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.7

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 openssl@1.1.1-1ubuntu2.1~18.04.4
  • Introduced through: concourse/concourse@5.5.5 openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

The X.509 GeneralName type is a generic type for representing different types of names. One of those name types is known as EDIPartyName. OpenSSL provides a function GENERAL_NAME_cmp which compares different instances of a GENERAL_NAME to see if they are equal or not. This function behaves incorrectly when both GENERAL_NAMEs contain an EDIPARTYNAME. A NULL pointer dereference and a crash may occur leading to a possible denial of service attack. OpenSSL itself uses the GENERAL_NAME_cmp function for two purposes: 1) Comparing CRL distribution point names between an available CRL and a CRL distribution point embedded in an X509 certificate 2) When verifying that a timestamp response token signer matches the timestamp authority name (exposed via the API functions TS_RESP_verify_response and TS_RESP_verify_token) If an attacker can control both items being compared then that attacker could trigger a crash. For example if the attacker can trick a client or server into checking a malicious certificate against a malicious CRL then this may occur. Note that some applications automatically download CRLs based on a URL embedded in a certificate. This checking happens prior to the signatures on the certificate and CRL being verified. OpenSSL's s_server, s_client and verify tools have support for the "-crl_download" option which implements automatic CRL downloading and this attack has been demonstrated to work against those tools. Note that an unrelated bug means that affected versions of OpenSSL cannot parse or construct correct encodings of EDIPARTYNAME. However it is possible to construct a malformed EDIPARTYNAME that OpenSSL's parser will accept and hence trigger this attack. All OpenSSL 1.1.1 and 1.0.2 versions are affected by this issue. Other OpenSSL releases are out of support and have not been checked. Fixed in OpenSSL 1.1.1i (Affected 1.1.1-1.1.1h). Fixed in OpenSSL 1.0.2x (Affected 1.0.2-1.0.2w).

Remediation

Upgrade Ubuntu:18.04 openssl to version 1.1.1-1ubuntu2.1~18.04.7 or higher.

References

high severity

NULL Pointer Dereference

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.1-1ubuntu2.1~18.04.4 and openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.9

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 openssl@1.1.1-1ubuntu2.1~18.04.4
  • Introduced through: concourse/concourse@5.5.5 openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from a client. If a TLSv1.2 renegotiation ClientHello omits the signature_algorithms extension (where it was present in the initial ClientHello), but includes a signature_algorithms_cert extension then a NULL pointer dereference will result, leading to a crash and a denial of service attack. A server is only vulnerable if it has TLSv1.2 and renegotiation enabled (which is the default configuration). OpenSSL TLS clients are not impacted by this issue. All OpenSSL 1.1.1 versions are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1k. OpenSSL 1.0.2 is not impacted by this issue. Fixed in OpenSSL 1.1.1k (Affected 1.1.1-1.1.1j).

Remediation

Upgrade Ubuntu:18.04 openssl to version 1.1.1-1ubuntu2.1~18.04.9 or higher.

References

high severity

Allocation of Resources Without Limits or Throttling

  • Vulnerable module: systemd/libsystemd0
  • Introduced through: systemd/libsystemd0@237-3ubuntu10.31 and systemd/libudev1@237-3ubuntu10.31
  • Fixed in: 237-3ubuntu10.49

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 systemd/libsystemd0@237-3ubuntu10.31
  • Introduced through: concourse/concourse@5.5.5 systemd/libudev1@237-3ubuntu10.31

NVD Description

Note: Versions mentioned in the description apply only to the upstream systemd package and not the systemd package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

basic/unit-name.c in systemd prior to 246.15, 247.8, 248.5, and 249.1 has a Memory Allocation with an Excessive Size Value (involving strdupa and alloca for a pathname controlled by a local attacker) that results in an operating system crash.

Remediation

Upgrade Ubuntu:18.04 systemd to version 237-3ubuntu10.49 or higher.

References

medium severity

Directory Traversal

  • Vulnerable module: dpkg
  • Introduced through: dpkg@1.19.0.5ubuntu2.3
  • Fixed in: 1.19.0.5ubuntu2.4

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 dpkg@1.19.0.5ubuntu2.3

NVD Description

Note: Versions mentioned in the description apply only to the upstream dpkg package and not the dpkg package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

Dpkg::Source::Archive in dpkg, the Debian package management system, before version 1.21.8, 1.20.10, 1.19.8, 1.18.26 is prone to a directory traversal vulnerability. When extracting untrusted source packages in v2 and v3 source package formats that include a debian.tar, the in-place extraction can lead to directory traversal situations on specially crafted orig.tar and debian.tar tarballs.

Remediation

Upgrade Ubuntu:18.04 dpkg to version 1.19.0.5ubuntu2.4 or higher.

References

medium severity

Out-of-bounds Write

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1, glibc/libc6@2.27-3ubuntu1 and others
  • Fixed in: 2.27-3ubuntu1.2

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/multiarch-support@2.27-3ubuntu1

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

stdlib/canonicalize.c in the GNU C Library (aka glibc or libc6) 2.27 and earlier, when processing very long pathname arguments to the realpath function, could encounter an integer overflow on 32-bit architectures, leading to a stack-based buffer overflow and, potentially, arbitrary code execution.

Remediation

Upgrade Ubuntu:18.04 glibc to version 2.27-3ubuntu1.2 or higher.

References

medium severity

Out-of-bounds Write

  • Vulnerable module: libidn2/libidn2-0
  • Introduced through: libidn2/libidn2-0@2.0.4-1.1build2
  • Fixed in: 2.0.4-1.1ubuntu0.2

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 libidn2/libidn2-0@2.0.4-1.1build2

NVD Description

Note: Versions mentioned in the description apply only to the upstream libidn2 package and not the libidn2 package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

idn2_to_ascii_4i in lib/lookup.c in GNU libidn2 before 2.1.1 has a heap-based buffer overflow via a long domain string.

Remediation

Upgrade Ubuntu:18.04 libidn2 to version 2.0.4-1.1ubuntu0.2 or higher.

References

medium severity

Out-of-bounds Write

  • Vulnerable module: lz4/liblz4-1
  • Introduced through: lz4/liblz4-1@0.0~r131-2ubuntu3
  • Fixed in: 0.0~r131-2ubuntu3.1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 lz4/liblz4-1@0.0~r131-2ubuntu3

NVD Description

Note: Versions mentioned in the description apply only to the upstream lz4 package and not the lz4 package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

There's a flaw in lz4. An attacker who submits a crafted file to an application linked with lz4 may be able to trigger an integer overflow, leading to calling of memmove() on a negative size argument, causing an out-of-bounds write and/or a crash. The greatest impact of this flaw is to availability, with some potential impact to confidentiality and integrity as well.

Remediation

Upgrade Ubuntu:18.04 lz4 to version 0.0~r131-2ubuntu3.1 or higher.

References

medium severity

OS Command Injection

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.1-1ubuntu2.1~18.04.4 and openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.17

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 openssl@1.1.1-1ubuntu2.1~18.04.4
  • Introduced through: concourse/concourse@5.5.5 openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

The c_rehash script does not properly sanitise shell metacharacters to prevent command injection. This script is distributed by some operating systems in a manner where it is automatically executed. On such operating systems, an attacker could execute arbitrary commands with the privileges of the script. Use of the c_rehash script is considered obsolete and should be replaced by the OpenSSL rehash command line tool. Fixed in OpenSSL 3.0.3 (Affected 3.0.0,3.0.1,3.0.2). Fixed in OpenSSL 1.1.1o (Affected 1.1.1-1.1.1n). Fixed in OpenSSL 1.0.2ze (Affected 1.0.2-1.0.2zd).

Remediation

Upgrade Ubuntu:18.04 openssl to version 1.1.1-1ubuntu2.1~18.04.17 or higher.

References

medium severity

OS Command Injection

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.1-1ubuntu2.1~18.04.4 and openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.19

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 openssl@1.1.1-1ubuntu2.1~18.04.4
  • Introduced through: concourse/concourse@5.5.5 openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

In addition to the c_rehash shell command injection identified in CVE-2022-1292, further circumstances where the c_rehash script does not properly sanitise shell metacharacters to prevent command injection were found by code review. When the CVE-2022-1292 was fixed it was not discovered that there are other places in the script where the file names of certificates being hashed were possibly passed to a command executed through the shell. This script is distributed by some operating systems in a manner where it is automatically executed. On such operating systems, an attacker could execute arbitrary commands with the privileges of the script. Use of the c_rehash script is considered obsolete and should be replaced by the OpenSSL rehash command line tool. Fixed in OpenSSL 3.0.4 (Affected 3.0.0,3.0.1,3.0.2,3.0.3). Fixed in OpenSSL 1.1.1p (Affected 1.1.1-1.1.1o). Fixed in OpenSSL 1.0.2zf (Affected 1.0.2-1.0.2ze).

Remediation

Upgrade Ubuntu:18.04 openssl to version 1.1.1-1ubuntu2.1~18.04.19 or higher.

References

medium severity

Use After Free

  • Vulnerable module: systemd/libsystemd0
  • Introduced through: systemd/libsystemd0@237-3ubuntu10.31 and systemd/libudev1@237-3ubuntu10.31
  • Fixed in: 237-3ubuntu10.56

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 systemd/libsystemd0@237-3ubuntu10.31
  • Introduced through: concourse/concourse@5.5.5 systemd/libudev1@237-3ubuntu10.31

NVD Description

Note: Versions mentioned in the description apply only to the upstream systemd package and not the systemd package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

A use-after-free vulnerability was found in systemd. This issue occurs due to the on_stream_io() function and dns_stream_complete() function in 'resolved-dns-stream.c' not incrementing the reference counting for the DnsStream object. Therefore, other functions and callbacks called can dereference the DNSStream object, causing the use-after-free when the reference is still used later.

Remediation

Upgrade Ubuntu:18.04 systemd to version 237-3ubuntu10.56 or higher.

References

medium severity

Out-of-bounds Write

  • Vulnerable module: zlib/zlib1g
  • Introduced through: zlib/zlib1g@1:1.2.11.dfsg-0ubuntu2
  • Fixed in: 1:1.2.11.dfsg-0ubuntu2.2

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 zlib/zlib1g@1:1.2.11.dfsg-0ubuntu2

NVD Description

Note: Versions mentioned in the description apply only to the upstream zlib package and not the zlib package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

zlib through 1.2.12 has a heap-based buffer over-read or buffer overflow in inflate in inflate.c via a large gzip header extra field. NOTE: only applications that call inflateGetHeader are affected. Some common applications bundle the affected zlib source code but may be unable to call inflateGetHeader (e.g., see the nodejs/node reference).

Remediation

Upgrade Ubuntu:18.04 zlib to version 1:1.2.11.dfsg-0ubuntu2.2 or higher.

References

medium severity

Improper Input Validation

  • Vulnerable module: gzip
  • Introduced through: gzip@1.6-5ubuntu1
  • Fixed in: 1.6-5ubuntu1.2

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 gzip@1.6-5ubuntu1

NVD Description

Note: Versions mentioned in the description apply only to the upstream gzip package and not the gzip package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

An arbitrary file write vulnerability was found in GNU gzip's zgrep utility. When zgrep is applied on the attacker's chosen file name (for example, a crafted file name), this can overwrite an attacker's content to an arbitrary attacker-selected file. This flaw occurs due to insufficient validation when processing filenames with two or more newlines where selected content and the target file names are embedded in crafted multi-line file names. This flaw allows a remote, low privileged attacker to force zgrep to write arbitrary files on the system.

Remediation

Upgrade Ubuntu:18.04 gzip to version 1.6-5ubuntu1.2 or higher.

References

medium severity

Improper Input Validation

  • Vulnerable module: xz-utils/liblzma5
  • Introduced through: xz-utils/liblzma5@5.2.2-1.3
  • Fixed in: 5.2.2-1.3ubuntu0.1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 xz-utils/liblzma5@5.2.2-1.3

NVD Description

Note: Versions mentioned in the description apply only to the upstream xz-utils package and not the xz-utils package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

An arbitrary file write vulnerability was found in GNU gzip's zgrep utility. When zgrep is applied on the attacker's chosen file name (for example, a crafted file name), this can overwrite an attacker's content to an arbitrary attacker-selected file. This flaw occurs due to insufficient validation when processing filenames with two or more newlines where selected content and the target file names are embedded in crafted multi-line file names. This flaw allows a remote, low privileged attacker to force zgrep to write arbitrary files on the system.

Remediation

Upgrade Ubuntu:18.04 xz-utils to version 5.2.2-1.3ubuntu0.1 or higher.

References

medium severity

Use of a Broken or Risky Cryptographic Algorithm

  • Vulnerable module: nettle/libhogweed4
  • Introduced through: nettle/libhogweed4@3.4-1 and nettle/libnettle6@3.4-1
  • Fixed in: 3.4-1ubuntu0.1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 nettle/libhogweed4@3.4-1
  • Introduced through: concourse/concourse@5.5.5 nettle/libnettle6@3.4-1

NVD Description

Note: Versions mentioned in the description apply only to the upstream nettle package and not the nettle package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

A flaw was found in Nettle in versions before 3.7.2, where several Nettle signature verification functions (GOST DSA, EDDSA & ECDSA) result in the Elliptic Curve Cryptography point (ECC) multiply function being called with out-of-range scalers, possibly resulting in incorrect results. This flaw allows an attacker to force an invalid signature, causing an assertion failure or possible validation. The highest threat to this vulnerability is to confidentiality, integrity, as well as system availability.

Remediation

Upgrade Ubuntu:18.04 nettle to version 3.4-1ubuntu0.1 or higher.

References

medium severity

Improper Certificate Validation

  • Vulnerable module: perl/perl-base
  • Introduced through: perl/perl-base@5.26.1-6ubuntu0.3
  • Fixed in: 5.26.1-6ubuntu0.7

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 perl/perl-base@5.26.1-6ubuntu0.3

NVD Description

Note: Versions mentioned in the description apply only to the upstream perl package and not the perl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

CPAN.pm before 2.35 does not verify TLS certificates when downloading distributions over HTTPS.

Remediation

Upgrade Ubuntu:18.04 perl to version 5.26.1-6ubuntu0.7 or higher.

References

medium severity

Out-of-bounds Read

  • Vulnerable module: e2fsprogs
  • Introduced through: e2fsprogs@1.44.1-1ubuntu1.2, e2fsprogs/libcom-err2@1.44.1-1ubuntu1.2 and others
  • Fixed in: 1.44.1-1ubuntu1.4

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 e2fsprogs@1.44.1-1ubuntu1.2
  • Introduced through: concourse/concourse@5.5.5 e2fsprogs/libcom-err2@1.44.1-1ubuntu1.2
  • Introduced through: concourse/concourse@5.5.5 e2fsprogs/libext2fs2@1.44.1-1ubuntu1.2
  • Introduced through: concourse/concourse@5.5.5 e2fsprogs/libss2@1.44.1-1ubuntu1.2

NVD Description

Note: Versions mentioned in the description apply only to the upstream e2fsprogs package and not the e2fsprogs package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

An out-of-bounds read/write vulnerability was found in e2fsprogs 1.46.5. This issue leads to a segmentation fault and possibly arbitrary code execution via a specially crafted filesystem.

Remediation

Upgrade Ubuntu:18.04 e2fsprogs to version 1.44.1-1ubuntu1.4 or higher.

References

medium severity

Out-of-bounds Write

  • Vulnerable module: file
  • Introduced through: file@1:5.32-2ubuntu0.2, file/libmagic-mgc@1:5.32-2ubuntu0.2 and others
  • Fixed in: 1:5.32-2ubuntu0.3

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 file@1:5.32-2ubuntu0.2
  • Introduced through: concourse/concourse@5.5.5 file/libmagic-mgc@1:5.32-2ubuntu0.2
  • Introduced through: concourse/concourse@5.5.5 file/libmagic1@1:5.32-2ubuntu0.2

NVD Description

Note: Versions mentioned in the description apply only to the upstream file package and not the file package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

cdf_read_property_info in cdf.c in file through 5.37 does not restrict the number of CDF_VECTOR elements, which allows a heap-based buffer overflow (4-byte out-of-bounds write).

Remediation

Upgrade Ubuntu:18.04 file to version 1:5.32-2ubuntu0.3 or higher.

References

medium severity

Off-by-one Error

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1, glibc/libc6@2.27-3ubuntu1 and others
  • Fixed in: 2.27-3ubuntu1.5

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/multiarch-support@2.27-3ubuntu1

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

A flaw was found in glibc. An off-by-one buffer overflow and underflow in getcwd() may lead to memory corruption when the size of the buffer is exactly 1. A local attacker who can control the input buffer and size passed to getcwd() in a setuid program could use this flaw to potentially execute arbitrary code and escalate their privileges on the system.

Remediation

Upgrade Ubuntu:18.04 glibc to version 2.27-3ubuntu1.5 or higher.

References

medium severity

Out-of-bounds Write

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1, glibc/libc6@2.27-3ubuntu1 and others
  • Fixed in: 2.27-3ubuntu1.2

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/multiarch-support@2.27-3ubuntu1

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

An AVX-512-optimized implementation of the mempcpy function in the GNU C Library (aka glibc or libc6) 2.27 and earlier may write data beyond the target buffer, leading to a buffer overflow in __mempcpy_avx512_no_vzeroupper.

Remediation

Upgrade Ubuntu:18.04 glibc to version 2.27-3ubuntu1.2 or higher.

References

medium severity

Out-of-bounds Write

  • Vulnerable module: ncurses/libncurses5
  • Introduced through: ncurses/libncurses5@6.1-1ubuntu1.18.04, ncurses/libncursesw5@6.1-1ubuntu1.18.04 and others
  • Fixed in: 6.1-1ubuntu1.18.04.1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 ncurses/libncurses5@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse@5.5.5 ncurses/libncursesw5@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse@5.5.5 ncurses/libtinfo5@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse@5.5.5 ncurses/ncurses-base@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse@5.5.5 ncurses/ncurses-bin@6.1-1ubuntu1.18.04

NVD Description

Note: Versions mentioned in the description apply only to the upstream ncurses package and not the ncurses package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

ncurses before 6.4 20230408, when used by a setuid application, allows local users to trigger security-relevant memory corruption via malformed data in a terminfo database file that is found in $HOME/.terminfo or reached via the TERMINFO or TERM environment variable.

Remediation

Upgrade Ubuntu:18.04 ncurses to version 6.1-1ubuntu1.18.04.1 or higher.

References

medium severity

Improper Verification of Cryptographic Signature

  • Vulnerable module: perl/perl-base
  • Introduced through: perl/perl-base@5.26.1-6ubuntu0.3
  • Fixed in: 5.26.1-6ubuntu0.6

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 perl/perl-base@5.26.1-6ubuntu0.3

NVD Description

Note: Versions mentioned in the description apply only to the upstream perl package and not the perl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

CPAN 2.28 allows Signature Verification Bypass.

Remediation

Upgrade Ubuntu:18.04 perl to version 5.26.1-6ubuntu0.6 or higher.

References

medium severity

Use After Free

  • Vulnerable module: systemd/libsystemd0
  • Introduced through: systemd/libsystemd0@237-3ubuntu10.31 and systemd/libudev1@237-3ubuntu10.31
  • Fixed in: 237-3ubuntu10.38

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 systemd/libsystemd0@237-3ubuntu10.31
  • Introduced through: concourse/concourse@5.5.5 systemd/libudev1@237-3ubuntu10.31

NVD Description

Note: Versions mentioned in the description apply only to the upstream systemd package and not the systemd package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

A heap use-after-free vulnerability was found in systemd before version v245-rc1, where asynchronous Polkit queries are performed while handling dbus messages. A local unprivileged attacker can abuse this flaw to crash systemd services or potentially execute code and elevate their privileges, by sending specially crafted dbus messages.

Remediation

Upgrade Ubuntu:18.04 systemd to version 237-3ubuntu10.38 or higher.

References

medium severity

Insufficient Verification of Data Authenticity

  • Vulnerable module: ca-certificates
  • Introduced through: ca-certificates@20180409
  • Fixed in: 20211016ubuntu0.18.04.1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 ca-certificates@20180409

NVD Description

Note: Versions mentioned in the description apply only to the upstream ca-certificates package and not the ca-certificates package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

Certifi is a curated collection of Root Certificates for validating the trustworthiness of SSL certificates while verifying the identity of TLS hosts. Certifi 2022.12.07 removes root certificates from "TrustCor" from the root store. These are in the process of being removed from Mozilla's trust store. TrustCor's root certificates are being removed pursuant to an investigation prompted by media reporting that TrustCor's ownership also operated a business that produced spyware. Conclusions of Mozilla's investigation can be found in the linked google group discussion.

Remediation

Upgrade Ubuntu:18.04 ca-certificates to version 20211016ubuntu0.18.04.1 or higher.

References

medium severity

Improper Input Validation

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1, glibc/libc6@2.27-3ubuntu1 and others
  • Fixed in: 2.27-3ubuntu1.2

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/multiarch-support@2.27-3ubuntu1

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

In the GNU C Library (aka glibc or libc6) through 2.28, attempting to resolve a crafted hostname via getaddrinfo() leads to the allocation of a socket descriptor that is not closed. This is related to the if_nametoindex() function.

Remediation

Upgrade Ubuntu:18.04 glibc to version 2.27-3ubuntu1.2 or higher.

References

medium severity

Double Free

  • Vulnerable module: gnutls28/libgnutls30
  • Introduced through: gnutls28/libgnutls30@3.5.18-1ubuntu1.1
  • Fixed in: 3.5.18-1ubuntu1.6

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 gnutls28/libgnutls30@3.5.18-1ubuntu1.1

NVD Description

Note: Versions mentioned in the description apply only to the upstream gnutls28 package and not the gnutls28 package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

A vulnerability found in gnutls. This security flaw happens because of a double free error occurs during verification of pkcs7 signatures in gnutls_pkcs7_verify function.

Remediation

Upgrade Ubuntu:18.04 gnutls28 to version 3.5.18-1ubuntu1.6 or higher.

References

medium severity

Improper Input Validation

  • Vulnerable module: libidn2/libidn2-0
  • Introduced through: libidn2/libidn2-0@2.0.4-1.1build2
  • Fixed in: 2.0.4-1.1ubuntu0.2

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 libidn2/libidn2-0@2.0.4-1.1build2

NVD Description

Note: Versions mentioned in the description apply only to the upstream libidn2 package and not the libidn2 package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

GNU libidn2 before 2.2.0 fails to perform the roundtrip checks specified in RFC3490 Section 4.2 when converting A-labels to U-labels. This makes it possible in some circumstances for one domain to impersonate another. By creating a malicious domain that matches a target domain except for the inclusion of certain punycoded Unicode characters (that would be discarded when converted first to a Unicode label and then back to an ASCII label), arbitrary domains can be impersonated.

Remediation

Upgrade Ubuntu:18.04 libidn2 to version 2.0.4-1.1ubuntu0.2 or higher.

References

medium severity

Improper Input Validation

  • Vulnerable module: nettle/libhogweed4
  • Introduced through: nettle/libhogweed4@3.4-1 and nettle/libnettle6@3.4-1
  • Fixed in: 3.4.1-0ubuntu0.18.04.1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 nettle/libhogweed4@3.4-1
  • Introduced through: concourse/concourse@5.5.5 nettle/libnettle6@3.4-1

NVD Description

Note: Versions mentioned in the description apply only to the upstream nettle package and not the nettle package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

A flaw was found in the way nettle's RSA decryption functions handled specially crafted ciphertext. An attacker could use this flaw to provide a manipulated ciphertext leading to application crash and denial of service.

Remediation

Upgrade Ubuntu:18.04 nettle to version 3.4.1-0ubuntu0.18.04.1 or higher.

References

medium severity

Double Free

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.1-1ubuntu2.1~18.04.4 and openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.21

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 openssl@1.1.1-1ubuntu2.1~18.04.4
  • Introduced through: concourse/concourse@5.5.5 openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

The function PEM_read_bio_ex() reads a PEM file from a BIO and parses and decodes the "name" (e.g. "CERTIFICATE"), any header data and the payload data. If the function succeeds then the "name_out", "header" and "data" arguments are populated with pointers to buffers containing the relevant decoded data. The caller is responsible for freeing those buffers. It is possible to construct a PEM file that results in 0 bytes of payload data. In this case PEM_read_bio_ex() will return a failure code but will populate the header argument with a pointer to a buffer that has already been freed. If the caller also frees this buffer then a double free will occur. This will most likely lead to a crash. This could be exploited by an attacker who has the ability to supply malicious PEM files for parsing to achieve a denial of service attack.

The functions PEM_read_bio() and PEM_read() are simple wrappers around PEM_read_bio_ex() and therefore these functions are also directly affected.

These functions are also called indirectly by a number of other OpenSSL functions including PEM_X509_INFO_read_bio_ex() and SSL_CTX_use_serverinfo_file() which are also vulnerable. Some OpenSSL internal uses of these functions are not vulnerable because the caller does not free the header argument if PEM_read_bio_ex() returns a failure code. These locations include the PEM_read_bio_TYPE() functions as well as the decoders introduced in OpenSSL 3.0.

The OpenSSL asn1parse command line application is also impacted by this issue.

Remediation

Upgrade Ubuntu:18.04 openssl to version 1.1.1-1ubuntu2.1~18.04.21 or higher.

References

medium severity

Use After Free

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.1-1ubuntu2.1~18.04.4 and openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.21

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 openssl@1.1.1-1ubuntu2.1~18.04.4
  • Introduced through: concourse/concourse@5.5.5 openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

The public API function BIO_new_NDEF is a helper function used for streaming ASN.1 data via a BIO. It is primarily used internally to OpenSSL to support the SMIME, CMS and PKCS7 streaming capabilities, but may also be called directly by end user applications.

The function receives a BIO from the caller, prepends a new BIO_f_asn1 filter BIO onto the front of it to form a BIO chain, and then returns the new head of the BIO chain to the caller. Under certain conditions, for example if a CMS recipient public key is invalid, the new filter BIO is freed and the function returns a NULL result indicating a failure. However, in this case, the BIO chain is not properly cleaned up and the BIO passed by the caller still retains internal pointers to the previously freed filter BIO. If the caller then goes on to call BIO_pop() on the BIO then a use-after-free will occur. This will most likely result in a crash.

This scenario occurs directly in the internal function B64_write_ASN1() which may cause BIO_new_NDEF() to be called and will subsequently call BIO_pop() on the BIO. This internal function is in turn called by the public API functions PEM_write_bio_ASN1_stream, PEM_write_bio_CMS_stream, PEM_write_bio_PKCS7_stream, SMIME_write_ASN1, SMIME_write_CMS and SMIME_write_PKCS7.

Other public API functions that may be impacted by this include i2d_ASN1_bio_stream, BIO_new_CMS, BIO_new_PKCS7, i2d_CMS_bio_stream and i2d_PKCS7_bio_stream.

The OpenSSL cms and smime command line applications are similarly affected.

Remediation

Upgrade Ubuntu:18.04 openssl to version 1.1.1-1ubuntu2.1~18.04.21 or higher.

References

medium severity

Integer Overflow or Wraparound

  • Vulnerable module: p11-kit/libp11-kit0
  • Introduced through: p11-kit/libp11-kit0@0.23.9-2
  • Fixed in: 0.23.9-2ubuntu0.1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 p11-kit/libp11-kit0@0.23.9-2

NVD Description

Note: Versions mentioned in the description apply only to the upstream p11-kit package and not the p11-kit package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

An issue was discovered in p11-kit 0.21.1 through 0.23.21. Multiple integer overflows have been discovered in the array allocations in the p11-kit library and the p11-kit list command, where overflow checks are missing before calling realloc or calloc.

Remediation

Upgrade Ubuntu:18.04 p11-kit to version 0.23.9-2ubuntu0.1 or higher.

References

medium severity

Out-of-bounds Write

  • Vulnerable module: p11-kit/libp11-kit0
  • Introduced through: p11-kit/libp11-kit0@0.23.9-2
  • Fixed in: 0.23.9-2ubuntu0.1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 p11-kit/libp11-kit0@0.23.9-2

NVD Description

Note: Versions mentioned in the description apply only to the upstream p11-kit package and not the p11-kit package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

An issue was discovered in p11-kit 0.23.6 through 0.23.21. A heap-based buffer overflow has been discovered in the RPC protocol used by p11-kit server/remote commands and the client library. When the remote entity supplies a serialized byte array in a CK_ATTRIBUTE, the receiving entity may not allocate sufficient length for the buffer to store the deserialized value.

Remediation

Upgrade Ubuntu:18.04 p11-kit to version 0.23.9-2ubuntu0.1 or higher.

References

medium severity

Out-of-bounds Write

  • Vulnerable module: zlib/zlib1g
  • Introduced through: zlib/zlib1g@1:1.2.11.dfsg-0ubuntu2
  • Fixed in: 1:1.2.11.dfsg-0ubuntu2.1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 zlib/zlib1g@1:1.2.11.dfsg-0ubuntu2

NVD Description

Note: Versions mentioned in the description apply only to the upstream zlib package and not the zlib package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

zlib before 1.2.12 allows memory corruption when deflating (i.e., when compressing) if the input has many distant matches.

Remediation

Upgrade Ubuntu:18.04 zlib to version 1:1.2.11.dfsg-0ubuntu2.1 or higher.

References

medium severity

Out-of-bounds Read

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.1-1ubuntu2.1~18.04.4 and openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.13

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 openssl@1.1.1-1ubuntu2.1~18.04.4
  • Introduced through: concourse/concourse@5.5.5 openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

ASN.1 strings are represented internally within OpenSSL as an ASN1_STRING structure which contains a buffer holding the string data and a field holding the buffer length. This contrasts with normal C strings which are repesented as a buffer for the string data which is terminated with a NUL (0) byte. Although not a strict requirement, ASN.1 strings that are parsed using OpenSSL's own "d2i" functions (and other similar parsing functions) as well as any string whose value has been set with the ASN1_STRING_set() function will additionally NUL terminate the byte array in the ASN1_STRING structure. However, it is possible for applications to directly construct valid ASN1_STRING structures which do not NUL terminate the byte array by directly setting the "data" and "length" fields in the ASN1_STRING array. This can also happen by using the ASN1_STRING_set0() function. Numerous OpenSSL functions that print ASN.1 data have been found to assume that the ASN1_STRING byte array will be NUL terminated, even though this is not guaranteed for strings that have been directly constructed. Where an application requests an ASN.1 structure to be printed, and where that ASN.1 structure contains ASN1_STRINGs that have been directly constructed by the application without NUL terminating the "data" field, then a read buffer overrun can occur. The same thing can also occur during name constraints processing of certificates (for example if a certificate has been directly constructed by the application instead of loading it via the OpenSSL parsing functions, and the certificate contains non NUL terminated ASN1_STRING structures). It can also occur in the X509_get1_email(), X509_REQ_get1_email() and X509_get1_ocsp() functions. If a malicious actor can cause an application to directly construct an ASN1_STRING and then process it through one of the affected OpenSSL functions then this issue could be hit. This might result in a crash (causing a Denial of Service attack). It could also result in the disclosure of private memory contents (such as private keys, or sensitive plaintext). Fixed in OpenSSL 1.1.1l (Affected 1.1.1-1.1.1k). Fixed in OpenSSL 1.0.2za (Affected 1.0.2-1.0.2y).

Remediation

Upgrade Ubuntu:18.04 openssl to version 1.1.1-1ubuntu2.1~18.04.13 or higher.

References

medium severity

Out-of-bounds Write

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1, glibc/libc6@2.27-3ubuntu1 and others
  • Fixed in: 2.27-3ubuntu1.2

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/multiarch-support@2.27-3ubuntu1

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

An out-of-bounds write vulnerability was found in glibc before 2.31 when handling signal trampolines on PowerPC. Specifically, the backtrace function did not properly check the array bounds when storing the frame address, resulting in a denial of service or potential code execution. The highest threat from this vulnerability is to system availability.

Remediation

Upgrade Ubuntu:18.04 glibc to version 2.27-3ubuntu1.2 or higher.

References

medium severity

Out-of-bounds Write

  • Vulnerable module: e2fsprogs
  • Introduced through: e2fsprogs@1.44.1-1ubuntu1.2, e2fsprogs/libcom-err2@1.44.1-1ubuntu1.2 and others
  • Fixed in: 1.44.1-1ubuntu1.3

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 e2fsprogs@1.44.1-1ubuntu1.2
  • Introduced through: concourse/concourse@5.5.5 e2fsprogs/libcom-err2@1.44.1-1ubuntu1.2
  • Introduced through: concourse/concourse@5.5.5 e2fsprogs/libext2fs2@1.44.1-1ubuntu1.2
  • Introduced through: concourse/concourse@5.5.5 e2fsprogs/libss2@1.44.1-1ubuntu1.2

NVD Description

Note: Versions mentioned in the description apply only to the upstream e2fsprogs package and not the e2fsprogs package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

A code execution vulnerability exists in the directory rehashing functionality of E2fsprogs e2fsck 1.45.4. A specially crafted ext4 directory can cause an out-of-bounds write on the stack, resulting in code execution. An attacker can corrupt a partition to trigger this vulnerability.

Remediation

Upgrade Ubuntu:18.04 e2fsprogs to version 1.44.1-1ubuntu1.3 or higher.

References

medium severity

Arbitrary Code Injection

  • Vulnerable module: gnupg2/gpgv
  • Introduced through: gnupg2/gpgv@2.2.4-1ubuntu1.2
  • Fixed in: 2.2.4-1ubuntu1.6

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 gnupg2/gpgv@2.2.4-1ubuntu1.2

NVD Description

Note: Versions mentioned in the description apply only to the upstream gnupg2 package and not the gnupg2 package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

GnuPG through 2.3.6, in unusual situations where an attacker possesses any secret-key information from a victim's keyring and other constraints (e.g., use of GPGME) are met, allows signature forgery via injection into the status line.

Remediation

Upgrade Ubuntu:18.04 gnupg2 to version 2.2.4-1ubuntu1.6 or higher.

References

medium severity

Out-of-bounds Write

  • Vulnerable module: ncurses/libncurses5
  • Introduced through: ncurses/libncurses5@6.1-1ubuntu1.18.04, ncurses/libncursesw5@6.1-1ubuntu1.18.04 and others
  • Fixed in: 6.1-1ubuntu1.18.04.1+esm1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 ncurses/libncurses5@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse@5.5.5 ncurses/libncursesw5@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse@5.5.5 ncurses/libtinfo5@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse@5.5.5 ncurses/ncurses-base@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse@5.5.5 ncurses/ncurses-bin@6.1-1ubuntu1.18.04

NVD Description

Note: Versions mentioned in the description apply only to the upstream ncurses package and not the ncurses package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

Buffer Overflow vulnerability in postprocess_terminfo function in tinfo/parse_entry.c:997 in ncurses 6.1 allows remote attackers to cause a denial of service via crafted command.

Remediation

Upgrade Ubuntu:18.04 ncurses to version 6.1-1ubuntu1.18.04.1+esm1 or higher.

References

medium severity

Allocation of Resources Without Limits or Throttling

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.1-1ubuntu2.1~18.04.4 and openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.23

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 openssl@1.1.1-1ubuntu2.1~18.04.4
  • Introduced through: concourse/concourse@5.5.5 openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

Issue summary: Processing some specially crafted ASN.1 object identifiers or data containing them may be very slow.

Impact summary: Applications that use OBJ_obj2txt() directly, or use any of the OpenSSL subsystems OCSP, PKCS7/SMIME, CMS, CMP/CRMF or TS with no message size limit may experience notable to very long delays when processing those messages, which may lead to a Denial of Service.

An OBJECT IDENTIFIER is composed of a series of numbers - sub-identifiers - most of which have no size limit. OBJ_obj2txt() may be used to translate an ASN.1 OBJECT IDENTIFIER given in DER encoding form (using the OpenSSL type ASN1_OBJECT) to its canonical numeric text form, which are the sub-identifiers of the OBJECT IDENTIFIER in decimal form, separated by periods.

When one of the sub-identifiers in the OBJECT IDENTIFIER is very large (these are sizes that are seen as absurdly large, taking up tens or hundreds of KiBs), the translation to a decimal number in text may take a very long time. The time complexity is O(n^2) with 'n' being the size of the sub-identifiers in bytes (*).

With OpenSSL 3.0, support to fetch cryptographic algorithms using names / identifiers in string form was introduced. This includes using OBJECT IDENTIFIERs in canonical numeric text form as identifiers for fetching algorithms.

Such OBJECT IDENTIFIERs may be received through the ASN.1 structure AlgorithmIdentifier, which is commonly used in multiple protocols to specify what cryptographic algorithm should be used to sign or verify, encrypt or decrypt, or digest passed data.

Applications that call OBJ_obj2txt() directly with untrusted data are affected, with any version of OpenSSL. If the use is for the mere purpose of display, the severity is considered low.

In OpenSSL 3.0 and newer, this affects the subsystems OCSP, PKCS7/SMIME, CMS, CMP/CRMF or TS. It also impacts anything that processes X.509 certificates, including simple things like verifying its signature.

The impact on TLS is relatively low, because all versions of OpenSSL have a 100KiB limit on the peer's certificate chain. Additionally, this only impacts clients, or servers that have explicitly enabled client authentication.

In OpenSSL 1.1.1 and 1.0.2, this only affects displaying diverse objects, such as X.509 certificates. This is assumed to not happen in such a way that it would cause a Denial of Service, so these versions are considered not affected by this issue in such a way that it would be cause for concern, and the severity is therefore considered low.

Remediation

Upgrade Ubuntu:18.04 openssl to version 1.1.1-1ubuntu2.1~18.04.23 or higher.

References

medium severity

Race Condition

  • Vulnerable module: libgcrypt20
  • Introduced through: libgcrypt20@1.8.1-4ubuntu1.1
  • Fixed in: 1.8.1-4ubuntu1.2

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 libgcrypt20@1.8.1-4ubuntu1.1

NVD Description

Note: Versions mentioned in the description apply only to the upstream libgcrypt20 package and not the libgcrypt20 package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

It was discovered that there was a ECDSA timing attack in the libgcrypt20 cryptographic library. Version affected: 1.8.4-5, 1.7.6-2+deb9u3, and 1.6.3-2+deb8u4. Versions fixed: 1.8.5-2 and 1.6.3-2+deb8u7.

Remediation

Upgrade Ubuntu:18.04 libgcrypt20 to version 1.8.1-4ubuntu1.2 or higher.

References

medium severity

Information Exposure

  • Vulnerable module: gnutls28/libgnutls30
  • Introduced through: gnutls28/libgnutls30@3.5.18-1ubuntu1.1
  • Fixed in: 3.5.18-1ubuntu1.6+esm1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 gnutls28/libgnutls30@3.5.18-1ubuntu1.1

NVD Description

Note: Versions mentioned in the description apply only to the upstream gnutls28 package and not the gnutls28 package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

A vulnerability was found that the response times to malformed ciphertexts in RSA-PSK ClientKeyExchange differ from response times of ciphertexts with correct PKCS#1 v1.5 padding.

Remediation

Upgrade Ubuntu:18.04 gnutls28 to version 3.5.18-1ubuntu1.6+esm1 or higher.

References

medium severity

Use of a Broken or Risky Cryptographic Algorithm

  • Vulnerable module: libgcrypt20
  • Introduced through: libgcrypt20@1.8.1-4ubuntu1.1
  • Fixed in: 1.8.1-4ubuntu1.3

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 libgcrypt20@1.8.1-4ubuntu1.1

NVD Description

Note: Versions mentioned in the description apply only to the upstream libgcrypt20 package and not the libgcrypt20 package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

The ElGamal implementation in Libgcrypt before 1.9.4 allows plaintext recovery because, during interaction between two cryptographic libraries, a certain dangerous combination of the prime defined by the receiver's public key, the generator defined by the receiver's public key, and the sender's ephemeral exponents can lead to a cross-configuration attack against OpenPGP.

Remediation

Upgrade Ubuntu:18.04 libgcrypt20 to version 1.8.1-4ubuntu1.3 or higher.

References

medium severity

Information Exposure

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.1-1ubuntu2.1~18.04.4 and openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.21

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 openssl@1.1.1-1ubuntu2.1~18.04.4
  • Introduced through: concourse/concourse@5.5.5 openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

A timing based side channel exists in the OpenSSL RSA Decryption implementation which could be sufficient to recover a plaintext across a network in a Bleichenbacher style attack. To achieve a successful decryption an attacker would have to be able to send a very large number of trial messages for decryption. The vulnerability affects all RSA padding modes: PKCS#1 v1.5, RSA-OEAP and RSASVE.

For example, in a TLS connection, RSA is commonly used by a client to send an encrypted pre-master secret to the server. An attacker that had observed a genuine connection between a client and a server could use this flaw to send trial messages to the server and record the time taken to process them. After a sufficiently large number of messages the attacker could recover the pre-master secret used for the original connection and thus be able to decrypt the application data sent over that connection.

Remediation

Upgrade Ubuntu:18.04 openssl to version 1.1.1-1ubuntu2.1~18.04.21 or higher.

References

medium severity

Integer Overflow or Wraparound

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.1-1ubuntu2.1~18.04.4 and openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.8

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 openssl@1.1.1-1ubuntu2.1~18.04.4
  • Introduced through: concourse/concourse@5.5.5 openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

The OpenSSL public API function X509_issuer_and_serial_hash() attempts to create a unique hash value based on the issuer and serial number data contained within an X509 certificate. However it fails to correctly handle any errors that may occur while parsing the issuer field (which might occur if the issuer field is maliciously constructed). This may subsequently result in a NULL pointer deref and a crash leading to a potential denial of service attack. The function X509_issuer_and_serial_hash() is never directly called by OpenSSL itself so applications are only vulnerable if they use this function directly and they use it on certificates that may have been obtained from untrusted sources. OpenSSL versions 1.1.1i and below are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1j. OpenSSL versions 1.0.2x and below are affected by this issue. However OpenSSL 1.0.2 is out of support and no longer receiving public updates. Premium support customers of OpenSSL 1.0.2 should upgrade to 1.0.2y. Other users should upgrade to 1.1.1j. Fixed in OpenSSL 1.1.1j (Affected 1.1.1-1.1.1i). Fixed in OpenSSL 1.0.2y (Affected 1.0.2-1.0.2x).

Remediation

Upgrade Ubuntu:18.04 openssl to version 1.1.1-1ubuntu2.1~18.04.8 or higher.

References

medium severity

Integer Overflow or Wraparound

  • Vulnerable module: apt
  • Introduced through: apt@1.6.12 and apt/libapt-pkg5.0@1.6.12
  • Fixed in: 1.6.12ubuntu0.2

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 apt@1.6.12
  • Introduced through: concourse/concourse@5.5.5 apt/libapt-pkg5.0@1.6.12

NVD Description

Note: Versions mentioned in the description apply only to the upstream apt package and not the apt package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

APT had several integer overflows and underflows while parsing .deb packages, aka GHSL-2020-168 GHSL-2020-169, in files apt-pkg/contrib/extracttar.cc, apt-pkg/deb/debfile.cc, and apt-pkg/contrib/arfile.cc. This issue affects: apt 1.2.32ubuntu0 versions prior to 1.2.32ubuntu0.2; 1.6.12ubuntu0 versions prior to 1.6.12ubuntu0.2; 2.0.2ubuntu0 versions prior to 2.0.2ubuntu0.2; 2.1.10ubuntu0 versions prior to 2.1.10ubuntu0.1;

Remediation

Upgrade Ubuntu:18.04 apt to version 1.6.12ubuntu0.2 or higher.

References

medium severity

Improper Input Validation

  • Vulnerable module: apt
  • Introduced through: apt@1.6.12 and apt/libapt-pkg5.0@1.6.12
  • Fixed in: 1.6.12ubuntu0.1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 apt@1.6.12
  • Introduced through: concourse/concourse@5.5.5 apt/libapt-pkg5.0@1.6.12

NVD Description

Note: Versions mentioned in the description apply only to the upstream apt package and not the apt package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

Missing input validation in the ar/tar implementations of APT before version 2.1.2 could result in denial of service when processing specially crafted deb files.

Remediation

Upgrade Ubuntu:18.04 apt to version 1.6.12ubuntu0.1 or higher.

References

medium severity

Out-of-bounds Write

  • Vulnerable module: elfutils/libelf1
  • Introduced through: elfutils/libelf1@0.170-0.4ubuntu0.1
  • Fixed in: 0.170-0.4ubuntu0.1+esm1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 elfutils/libelf1@0.170-0.4ubuntu0.1

NVD Description

Note: Versions mentioned in the description apply only to the upstream elfutils package and not the elfutils package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

The libcpu component which is used by libasm of elfutils version 0.177 (git 47780c9e), suffers from denial-of-service vulnerability caused by application crashes due to out-of-bounds write (CWE-787), off-by-one error (CWE-193) and reachable assertion (CWE-617); to exploit the vulnerability, the attackers need to craft certain ELF files which bypass the missing bound checks.

Remediation

Upgrade Ubuntu:18.04 elfutils to version 0.170-0.4ubuntu0.1+esm1 or higher.

References

medium severity

Information Exposure

  • Vulnerable module: gcc-8/gcc-8-base
  • Introduced through: gcc-8/gcc-8-base@8.3.0-6ubuntu1~18.04.1, gcc-8/libstdc++6@8.3.0-6ubuntu1~18.04.1 and others

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 gcc-8/gcc-8-base@8.3.0-6ubuntu1~18.04.1
  • Introduced through: concourse/concourse@5.5.5 gcc-8/libstdc++6@8.3.0-6ubuntu1~18.04.1
  • Introduced through: concourse/concourse@5.5.5 gcc-8/libgcc1@1:8.3.0-6ubuntu1~18.04.1

NVD Description

Note: Versions mentioned in the description apply only to the upstream gcc-8 package and not the gcc-8 package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

Arm Armv8-A core implementations utilizing speculative execution past unconditional changes in control flow may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis, aka "straight-line speculation."

Remediation

There is no fixed version for Ubuntu:18.04 gcc-8.

References

medium severity

Incorrect Default Permissions

  • Vulnerable module: libzstd/libzstd1
  • Introduced through: libzstd/libzstd1@1.3.3+dfsg-2ubuntu1.1
  • Fixed in: 1.3.3+dfsg-2ubuntu1.2

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 libzstd/libzstd1@1.3.3+dfsg-2ubuntu1.1

NVD Description

Note: Versions mentioned in the description apply only to the upstream libzstd package and not the libzstd package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

In the Zstandard command-line utility prior to v1.4.1, output files were created with default permissions. Correct file permissions (matching the input) would only be set at completion time. Output files could therefore be readable or writable to unintended parties.

Remediation

Upgrade Ubuntu:18.04 libzstd to version 1.3.3+dfsg-2ubuntu1.2 or higher.

References

medium severity
new

CVE-2024-22365

  • Vulnerable module: pam/libpam-modules
  • Introduced through: pam/libpam-modules@1.1.8-3.6ubuntu2.18.04.1, pam/libpam-modules-bin@1.1.8-3.6ubuntu2.18.04.1 and others
  • Fixed in: 1.1.8-3.6ubuntu2.18.04.6+esm1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 pam/libpam-modules@1.1.8-3.6ubuntu2.18.04.1
  • Introduced through: concourse/concourse@5.5.5 pam/libpam-modules-bin@1.1.8-3.6ubuntu2.18.04.1
  • Introduced through: concourse/concourse@5.5.5 pam/libpam-runtime@1.1.8-3.6ubuntu2.18.04.1
  • Introduced through: concourse/concourse@5.5.5 pam/libpam0g@1.1.8-3.6ubuntu2.18.04.1

NVD Description

Note: Versions mentioned in the description apply only to the upstream pam package and not the pam package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

linux-pam (aka Linux PAM) before 1.6.0 allows attackers to cause a denial of service (blocked login process) via mkfifo because the openat call (for protect_dir) lacks O_DIRECTORY.

Remediation

Upgrade Ubuntu:18.04 pam to version 1.1.8-3.6ubuntu2.18.04.6+esm1 or higher.

References

medium severity

Off-by-one Error

  • Vulnerable module: systemd/libsystemd0
  • Introduced through: systemd/libsystemd0@237-3ubuntu10.31 and systemd/libudev1@237-3ubuntu10.31
  • Fixed in: 237-3ubuntu10.57

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 systemd/libsystemd0@237-3ubuntu10.31
  • Introduced through: concourse/concourse@5.5.5 systemd/libudev1@237-3ubuntu10.31

NVD Description

Note: Versions mentioned in the description apply only to the upstream systemd package and not the systemd package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

An off-by-one Error issue was discovered in Systemd in format_timespan() function of time-util.c. An attacker could supply specific values for time and accuracy that leads to buffer overrun in format_timespan(), leading to a Denial of Service.

Remediation

Upgrade Ubuntu:18.04 systemd to version 237-3ubuntu10.57 or higher.

References

medium severity

Out-of-bounds Read

  • Vulnerable module: tar
  • Introduced through: tar@1.29b-2ubuntu0.1
  • Fixed in: 1.29b-2ubuntu0.4

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 tar@1.29b-2ubuntu0.1

NVD Description

Note: Versions mentioned in the description apply only to the upstream tar package and not the tar package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

GNU Tar through 1.34 has a one-byte out-of-bounds read that results in use of uninitialized memory for a conditional jump. Exploitation to change the flow of control has not been demonstrated. The issue occurs in from_header in list.c via a V7 archive in which mtime has approximately 11 whitespace characters.

Remediation

Upgrade Ubuntu:18.04 tar to version 1.29b-2ubuntu0.4 or higher.

References

medium severity

CVE-2020-22916

  • Vulnerable module: xz-utils/liblzma5
  • Introduced through: xz-utils/liblzma5@5.2.2-1.3

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 xz-utils/liblzma5@5.2.2-1.3

NVD Description

Note: Versions mentioned in the description apply only to the upstream xz-utils package and not the xz-utils package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

An issue discovered in XZ 5.2.5 allows attackers to cause a denial of service via decompression of a crafted file. NOTE: the vendor disputes the claims of "endless output" and "denial of service" because decompression of the 17,486 bytes always results in 114,881,179 bytes, which is often a reasonable size increase.

Remediation

There is no fixed version for Ubuntu:18.04 xz-utils.

References

medium severity

Use of a Broken or Risky Cryptographic Algorithm

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.1-1ubuntu2.1~18.04.4 and openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.20

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 openssl@1.1.1-1ubuntu2.1~18.04.4
  • Introduced through: concourse/concourse@5.5.5 openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

AES OCB mode for 32-bit x86 platforms using the AES-NI assembly optimised implementation will not encrypt the entirety of the data under some circumstances. This could reveal sixteen bytes of data that was preexisting in the memory that wasn't written. In the special case of "in place" encryption, sixteen bytes of the plaintext would be revealed. Since OpenSSL does not support OCB based cipher suites for TLS and DTLS, they are both unaffected. Fixed in OpenSSL 3.0.5 (Affected 3.0.0-3.0.4). Fixed in OpenSSL 1.1.1q (Affected 1.1.1-1.1.1p).

Remediation

Upgrade Ubuntu:18.04 openssl to version 1.1.1-1ubuntu2.1~18.04.20 or higher.

References

medium severity

Out-of-bounds Read

  • Vulnerable module: p11-kit/libp11-kit0
  • Introduced through: p11-kit/libp11-kit0@0.23.9-2
  • Fixed in: 0.23.9-2ubuntu0.1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 p11-kit/libp11-kit0@0.23.9-2

NVD Description

Note: Versions mentioned in the description apply only to the upstream p11-kit package and not the p11-kit package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

An issue was discovered in p11-kit 0.21.1 through 0.23.21. A heap-based buffer over-read has been discovered in the RPC protocol used by thep11-kit server/remote commands and the client library. When the remote entity supplies a byte array through a serialized PKCS#11 function call, the receiving entity may allow the reading of up to 4 bytes of memory past the heap allocation.

Remediation

Upgrade Ubuntu:18.04 p11-kit to version 0.23.9-2ubuntu0.1 or higher.

References

medium severity

Incorrect Default Permissions

  • Vulnerable module: libzstd/libzstd1
  • Introduced through: libzstd/libzstd1@1.3.3+dfsg-2ubuntu1.1
  • Fixed in: 1.3.3+dfsg-2ubuntu1.2

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 libzstd/libzstd1@1.3.3+dfsg-2ubuntu1.1

NVD Description

Note: Versions mentioned in the description apply only to the upstream libzstd package and not the libzstd package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

Beginning in v1.4.1 and prior to v1.4.9, due to an incomplete fix for CVE-2021-24031, the Zstandard command-line utility created output files with default permissions and restricted those permissions immediately afterwards. Output files could therefore momentarily be readable or writable to unintended parties.

Remediation

Upgrade Ubuntu:18.04 libzstd to version 1.3.3+dfsg-2ubuntu1.2 or higher.

References

medium severity

Use After Free

  • Vulnerable module: iproute2
  • Introduced through: iproute2@4.15.0-2ubuntu1
  • Fixed in: 4.15.0-2ubuntu1.1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 iproute2@4.15.0-2ubuntu1

NVD Description

Note: Versions mentioned in the description apply only to the upstream iproute2 package and not the iproute2 package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

iproute2 before 5.1.0 has a use-after-free in get_netnsid_from_name in ip/ipnetns.c. NOTE: security relevance may be limited to certain uses of setuid that, although not a default, are sometimes a configuration option offered to end users. Even when setuid is used, other factors (such as C library configuration) may block exploitability.

Remediation

Upgrade Ubuntu:18.04 iproute2 to version 4.15.0-2ubuntu1.1 or higher.

References

medium severity
new

Information Exposure

  • Vulnerable module: libgcrypt20
  • Introduced through: libgcrypt20@1.8.1-4ubuntu1.1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 libgcrypt20@1.8.1-4ubuntu1.1

NVD Description

Note: Versions mentioned in the description apply only to the upstream libgcrypt20 package and not the libgcrypt20 package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

A timing-based side-channel flaw was found in libgcrypt's RSA implementation. This issue may allow a remote attacker to initiate a Bleichenbacher-style attack, which can lead to the decryption of RSA ciphertexts.

Remediation

There is no fixed version for Ubuntu:18.04 libgcrypt20.

References

medium severity

CVE-2023-39804

  • Vulnerable module: tar
  • Introduced through: tar@1.29b-2ubuntu0.1
  • Fixed in: 1.29b-2ubuntu0.4+esm1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 tar@1.29b-2ubuntu0.1

NVD Description

Note: Versions mentioned in the description apply only to the upstream tar package and not the tar package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

In GNU tar before 1.35, mishandled extension attributes in a PAX archive can lead to an application crash in xheader.c.

Remediation

Upgrade Ubuntu:18.04 tar to version 1.29b-2ubuntu0.4+esm1 or higher.

References

low severity

Buffer Overflow

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1, glibc/libc6@2.27-3ubuntu1 and others
  • Fixed in: 2.27-3ubuntu1.5

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/multiarch-support@2.27-3ubuntu1

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

The deprecated compatibility function clnt_create in the sunrpc module of the GNU C Library (aka glibc) through 2.34 copies its hostname argument on the stack without validating its length, which may result in a buffer overflow, potentially resulting in a denial of service or (if an application is not built with a stack protector enabled) arbitrary code execution.

Remediation

Upgrade Ubuntu:18.04 glibc to version 2.27-3ubuntu1.5 or higher.

References

low severity

Buffer Overflow

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1, glibc/libc6@2.27-3ubuntu1 and others
  • Fixed in: 2.27-3ubuntu1.5

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/multiarch-support@2.27-3ubuntu1

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

The deprecated compatibility function svcunix_create in the sunrpc module of the GNU C Library (aka glibc) through 2.34 copies its path argument on the stack without validating its length, which may result in a buffer overflow, potentially resulting in a denial of service or (if an application is not built with a stack protector enabled) arbitrary code execution.

Remediation

Upgrade Ubuntu:18.04 glibc to version 2.27-3ubuntu1.5 or higher.

References

low severity

Out-of-bounds Read

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1, glibc/libc6@2.27-3ubuntu1 and others
  • Fixed in: 2.27-3ubuntu1.2

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/multiarch-support@2.27-3ubuntu1

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

In the GNU C Library (aka glibc or libc6) through 2.29, proceed_next_node in posix/regexec.c has a heap-based buffer over-read via an attempted case-insensitive regular-expression match.

Remediation

Upgrade Ubuntu:18.04 glibc to version 2.27-3ubuntu1.2 or higher.

References

low severity

Use After Free

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1, glibc/libc6@2.27-3ubuntu1 and others

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/multiarch-support@2.27-3ubuntu1

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

The mq_notify function in the GNU C Library (aka glibc) versions 2.32 and 2.33 has a use-after-free. It may use the notification thread attributes object (passed through its struct sigevent parameter) after it has been freed by the caller, leading to a denial of service (application crash) or possibly unspecified other impact.

Remediation

There is no fixed version for Ubuntu:18.04 glibc.

References

low severity

Improper Authentication

  • Vulnerable module: pam/libpam-modules
  • Introduced through: pam/libpam-modules@1.1.8-3.6ubuntu2.18.04.1, pam/libpam-modules-bin@1.1.8-3.6ubuntu2.18.04.1 and others
  • Fixed in: 1.1.8-3.6ubuntu2.18.04.4

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 pam/libpam-modules@1.1.8-3.6ubuntu2.18.04.1
  • Introduced through: concourse/concourse@5.5.5 pam/libpam-modules-bin@1.1.8-3.6ubuntu2.18.04.1
  • Introduced through: concourse/concourse@5.5.5 pam/libpam-runtime@1.1.8-3.6ubuntu2.18.04.1
  • Introduced through: concourse/concourse@5.5.5 pam/libpam0g@1.1.8-3.6ubuntu2.18.04.1

NVD Description

Note: Versions mentioned in the description apply only to the upstream pam package and not the pam package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

The Linux-PAM package before 1.5.2-6.1 for openSUSE Tumbleweed allows authentication bypass for SSH logins. The pam_access.so module doesn't correctly restrict login if a user tries to connect from an IP address that is not resolvable via DNS. In such conditions, a user with denied access to a machine can still get access. NOTE: the relevance of this issue is largely limited to openSUSE Tumbleweed and openSUSE Factory; it does not affect Linux-PAM upstream.

Remediation

Upgrade Ubuntu:18.04 pam to version 1.1.8-3.6ubuntu2.18.04.4 or higher.

References

low severity

Integer Overflow or Wraparound

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1, glibc/libc6@2.27-3ubuntu1 and others
  • Fixed in: 2.27-3ubuntu1.5

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/multiarch-support@2.27-3ubuntu1

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

The wordexp function in the GNU C Library (aka glibc) through 2.33 may crash or read arbitrary memory in parse_param (in posix/wordexp.c) when called with an untrusted, crafted pattern, potentially resulting in a denial of service or disclosure of information. This occurs because atoi was used but strtoul should have been used to ensure correct calculations.

Remediation

Upgrade Ubuntu:18.04 glibc to version 2.27-3ubuntu1.5 or higher.

References

low severity

Out-of-bounds Write

  • Vulnerable module: ncurses/libncurses5
  • Introduced through: ncurses/libncurses5@6.1-1ubuntu1.18.04, ncurses/libncursesw5@6.1-1ubuntu1.18.04 and others
  • Fixed in: 6.1-1ubuntu1.18.04.1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 ncurses/libncurses5@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse@5.5.5 ncurses/libncursesw5@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse@5.5.5 ncurses/libtinfo5@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse@5.5.5 ncurses/ncurses-base@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse@5.5.5 ncurses/ncurses-bin@6.1-1ubuntu1.18.04

NVD Description

Note: Versions mentioned in the description apply only to the upstream ncurses package and not the ncurses package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

An issue was discovered in ncurses through v6.2-1. _nc_captoinfo in captoinfo.c has a heap-based buffer overflow.

Remediation

Upgrade Ubuntu:18.04 ncurses to version 6.1-1ubuntu1.18.04.1 or higher.

References

low severity

Integer Overflow or Wraparound

  • Vulnerable module: perl/perl-base
  • Introduced through: perl/perl-base@5.26.1-6ubuntu0.3
  • Fixed in: 5.26.1-6ubuntu0.5

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 perl/perl-base@5.26.1-6ubuntu0.3

NVD Description

Note: Versions mentioned in the description apply only to the upstream perl package and not the perl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

Perl before 5.30.3 has an integer overflow related to mishandling of a "PL_regkind[OP(n)] == NOTHING" situation. A crafted regular expression could lead to malformed bytecode with a possibility of instruction injection.

Remediation

Upgrade Ubuntu:18.04 perl to version 5.26.1-6ubuntu0.5 or higher.

References

low severity

Out-of-bounds Write

  • Vulnerable module: perl/perl-base
  • Introduced through: perl/perl-base@5.26.1-6ubuntu0.3
  • Fixed in: 5.26.1-6ubuntu0.5

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 perl/perl-base@5.26.1-6ubuntu0.3

NVD Description

Note: Versions mentioned in the description apply only to the upstream perl package and not the perl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

Perl before 5.30.3 on 32-bit platforms allows a heap-based buffer overflow because nested regular expression quantifiers have an integer overflow.

Remediation

Upgrade Ubuntu:18.04 perl to version 5.26.1-6ubuntu0.5 or higher.

References

low severity

Integer Underflow

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1, glibc/libc6@2.27-3ubuntu1 and others
  • Fixed in: 2.27-3ubuntu1.5

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/multiarch-support@2.27-3ubuntu1

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

An exploitable signed comparison vulnerability exists in the ARMv7 memcpy() implementation of GNU glibc 2.30.9000. Calling memcpy() (on ARMv7 targets that utilize the GNU glibc implementation) with a negative value for the 'num' parameter results in a signed comparison vulnerability. If an attacker underflows the 'num' parameter to memcpy(), this vulnerability could lead to undefined behavior such as writing to out-of-bounds memory and potentially remote code execution. Furthermore, this memcpy() implementation allows for program execution to continue in scenarios where a segmentation fault or crash should have occurred. The dangers occur in that subsequent execution and iterations of this code will be executed with this corrupted data.

Remediation

Upgrade Ubuntu:18.04 glibc to version 2.27-3ubuntu1.5 or higher.

References

low severity

Improper Check for Dropped Privileges

  • Vulnerable module: bash
  • Introduced through: bash@4.4.18-2ubuntu1.2
  • Fixed in: 4.4.18-2ubuntu1.3

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 bash@4.4.18-2ubuntu1.2

NVD Description

Note: Versions mentioned in the description apply only to the upstream bash package and not the bash package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

An issue was discovered in disable_priv_mode in shell.c in GNU Bash through 5.0 patch 11. By default, if Bash is run with its effective UID not equal to its real UID, it will drop privileges by setting its effective UID to its real UID. However, it does so incorrectly. On Linux and other systems that support "saved UID" functionality, the saved UID is not dropped. An attacker with command execution in the shell can use "enable -f" for runtime loading of a new builtin, which can be a shared object that calls setuid() and therefore regains privileges. However, binaries running with an effective UID of 0 are unaffected.

Remediation

Upgrade Ubuntu:18.04 bash to version 4.4.18-2ubuntu1.3 or higher.

References

low severity

CVE-2023-26604

  • Vulnerable module: systemd/libsystemd0
  • Introduced through: systemd/libsystemd0@237-3ubuntu10.31 and systemd/libudev1@237-3ubuntu10.31

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 systemd/libsystemd0@237-3ubuntu10.31
  • Introduced through: concourse/concourse@5.5.5 systemd/libudev1@237-3ubuntu10.31

NVD Description

Note: Versions mentioned in the description apply only to the upstream systemd package and not the systemd package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

systemd before 247 does not adequately block local privilege escalation for some Sudo configurations, e.g., plausible sudoers files in which the "systemctl status" command may be executed. Specifically, systemd does not set LESSSECURE to 1, and thus other programs may be launched from the less program. This presents a substantial security risk when running systemctl from Sudo, because less executes as root when the terminal size is too small to show the complete systemctl output.

Remediation

There is no fixed version for Ubuntu:18.04 systemd.

References

low severity

Incorrect Privilege Assignment

  • Vulnerable module: systemd/libsystemd0
  • Introduced through: systemd/libsystemd0@237-3ubuntu10.31 and systemd/libudev1@237-3ubuntu10.31
  • Fixed in: 237-3ubuntu10.38

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 systemd/libsystemd0@237-3ubuntu10.31
  • Introduced through: concourse/concourse@5.5.5 systemd/libudev1@237-3ubuntu10.31

NVD Description

Note: Versions mentioned in the description apply only to the upstream systemd package and not the systemd package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

It was discovered that a systemd service that uses DynamicUser property can create a SUID/SGID binary that would be allowed to run as the transient service UID/GID even after the service is terminated. A local attacker may use this flaw to access resources that will be owned by a potentially different service in the future, when the UID/GID will be recycled.

Remediation

Upgrade Ubuntu:18.04 systemd to version 237-3ubuntu10.38 or higher.

References

low severity

Privilege Chaining

  • Vulnerable module: systemd/libsystemd0
  • Introduced through: systemd/libsystemd0@237-3ubuntu10.31 and systemd/libudev1@237-3ubuntu10.31
  • Fixed in: 237-3ubuntu10.38

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 systemd/libsystemd0@237-3ubuntu10.31
  • Introduced through: concourse/concourse@5.5.5 systemd/libudev1@237-3ubuntu10.31

NVD Description

Note: Versions mentioned in the description apply only to the upstream systemd package and not the systemd package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

It was discovered that a systemd service that uses DynamicUser property can get new privileges through the execution of SUID binaries, which would allow to create binaries owned by the service transient group with the setgid bit set. A local attacker may use this flaw to access resources that will be owned by a potentially different service in the future, when the GID will be recycled.

Remediation

Upgrade Ubuntu:18.04 systemd to version 237-3ubuntu10.38 or higher.

References

low severity

CVE-2018-7738

  • Vulnerable module: util-linux
  • Introduced through: util-linux@2.31.1-0.4ubuntu3.4, util-linux/fdisk@2.31.1-0.4ubuntu3.4 and others
  • Fixed in: 2.31.1-0.4ubuntu3.7

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 util-linux@2.31.1-0.4ubuntu3.4
  • Introduced through: concourse/concourse@5.5.5 util-linux/fdisk@2.31.1-0.4ubuntu3.4
  • Introduced through: concourse/concourse@5.5.5 util-linux/libblkid1@2.31.1-0.4ubuntu3.4
  • Introduced through: concourse/concourse@5.5.5 util-linux/libfdisk1@2.31.1-0.4ubuntu3.4
  • Introduced through: concourse/concourse@5.5.5 util-linux/libmount1@2.31.1-0.4ubuntu3.4
  • Introduced through: concourse/concourse@5.5.5 util-linux/libsmartcols1@2.31.1-0.4ubuntu3.4
  • Introduced through: concourse/concourse@5.5.5 util-linux/libuuid1@2.31.1-0.4ubuntu3.4
  • Introduced through: concourse/concourse@5.5.5 util-linux/mount@2.31.1-0.4ubuntu3.4

NVD Description

Note: Versions mentioned in the description apply only to the upstream util-linux package and not the util-linux package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

In util-linux before 2.32-rc1, bash-completion/umount allows local users to gain privileges by embedding shell commands in a mountpoint name, which is mishandled during a umount command (within Bash) by a different user, as demonstrated by logging in as root and entering umount followed by a tab character for autocompletion.

Remediation

Upgrade Ubuntu:18.04 util-linux to version 2.31.1-0.4ubuntu3.7 or higher.

References

low severity

Insufficient Entropy

  • Vulnerable module: gcc-8/gcc-8-base
  • Introduced through: gcc-8/gcc-8-base@8.3.0-6ubuntu1~18.04.1 and gcc-8/libstdc++6@8.3.0-6ubuntu1~18.04.1
  • Fixed in: 8.3.0-26ubuntu1~18.04

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 gcc-8/gcc-8-base@8.3.0-6ubuntu1~18.04.1
  • Introduced through: concourse/concourse@5.5.5 gcc-8/libstdc++6@8.3.0-6ubuntu1~18.04.1

NVD Description

Note: Versions mentioned in the description apply only to the upstream gcc-8 package and not the gcc-8 package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

The POWER9 backend in GNU Compiler Collection (GCC) before version 10 could optimize multiple calls of the __builtin_darn intrinsic into a single call, thus reducing the entropy of the random number generator. This occurred because a volatile operation was not specified. For example, within a single execution of a program, the output of every __builtin_darn() call may be the same.

Remediation

Upgrade Ubuntu:18.04 gcc-8 to version 8.3.0-26ubuntu1~18.04 or higher.

References

low severity

Allocation of Resources Without Limits or Throttling

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1, glibc/libc6@2.27-3ubuntu1 and others

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/multiarch-support@2.27-3ubuntu1

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

sha256crypt and sha512crypt through 0.6 allow attackers to cause a denial of service (CPU consumption) because the algorithm's runtime is proportional to the square of the length of the password.

Remediation

There is no fixed version for Ubuntu:18.04 glibc.

References

low severity

Improper Data Handling

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1, glibc/libc6@2.27-3ubuntu1 and others

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/multiarch-support@2.27-3ubuntu1

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

In the GNU C Library (aka glibc or libc6) before 2.28, parse_reg_exp in posix/regcomp.c misparses alternatives, which allows attackers to cause a denial of service (assertion failure and application exit) or trigger an incorrect result by attempting a regular-expression match.

Remediation

There is no fixed version for Ubuntu:18.04 glibc.

References

low severity

Reachable Assertion

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1, glibc/libc6@2.27-3ubuntu1 and others
  • Fixed in: 2.27-3ubuntu1.5

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/multiarch-support@2.27-3ubuntu1

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

The iconv function in the GNU C Library (aka glibc or libc6) 2.32 and earlier, when processing invalid input sequences in the ISO-2022-JP-3 encoding, fails an assertion in the code path and aborts the program, potentially resulting in a denial of service.

Remediation

Upgrade Ubuntu:18.04 glibc to version 2.27-3ubuntu1.5 or higher.

References

low severity

Integer Overflow or Wraparound

  • Vulnerable module: gmp/libgmp10
  • Introduced through: gmp/libgmp10@2:6.1.2+dfsg-2
  • Fixed in: 2:6.1.2+dfsg-2ubuntu0.1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 gmp/libgmp10@2:6.1.2+dfsg-2

NVD Description

Note: Versions mentioned in the description apply only to the upstream gmp package and not the gmp package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

GNU Multiple Precision Arithmetic Library (GMP) through 6.2.1 has an mpz/inp_raw.c integer overflow and resultant buffer overflow via crafted input, leading to a segmentation fault on 32-bit platforms.

Remediation

Upgrade Ubuntu:18.04 gmp to version 2:6.1.2+dfsg-2ubuntu0.1 or higher.

References

low severity

Improper Certificate Validation

  • Vulnerable module: gnupg2/gpgv
  • Introduced through: gnupg2/gpgv@2.2.4-1ubuntu1.2
  • Fixed in: 2.2.4-1ubuntu1.5

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 gnupg2/gpgv@2.2.4-1ubuntu1.2

NVD Description

Note: Versions mentioned in the description apply only to the upstream gnupg2 package and not the gnupg2 package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

Interaction between the sks-keyserver code through 1.2.0 of the SKS keyserver network, and GnuPG through 2.2.16, makes it risky to have a GnuPG keyserver configuration line referring to a host on the SKS keyserver network. Retrieving data from this network may cause a persistent denial of service, because of a Certificate Spamming Attack.

Remediation

Upgrade Ubuntu:18.04 gnupg2 to version 2.2.4-1ubuntu1.5 or higher.

References

low severity

Use of a Broken or Risky Cryptographic Algorithm

  • Vulnerable module: gnupg2/gpgv
  • Introduced through: gnupg2/gpgv@2.2.4-1ubuntu1.2
  • Fixed in: 2.2.4-1ubuntu1.3

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 gnupg2/gpgv@2.2.4-1ubuntu1.2

NVD Description

Note: Versions mentioned in the description apply only to the upstream gnupg2 package and not the gnupg2 package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

A flaw was found in the way certificate signatures could be forged using collisions found in the SHA-1 algorithm. An attacker could use this weakness to create forged certificate signatures. This issue affects GnuPG versions before 2.2.18.

Remediation

Upgrade Ubuntu:18.04 gnupg2 to version 2.2.4-1ubuntu1.3 or higher.

References

low severity

Information Exposure

  • Vulnerable module: libgcrypt20
  • Introduced through: libgcrypt20@1.8.1-4ubuntu1.1
  • Fixed in: 1.8.1-4ubuntu1.3

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 libgcrypt20@1.8.1-4ubuntu1.1

NVD Description

Note: Versions mentioned in the description apply only to the upstream libgcrypt20 package and not the libgcrypt20 package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

Libgcrypt before 1.8.8 and 1.9.x before 1.9.3 mishandles ElGamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm, and the window size is not chosen appropriately. This, for example, affects use of ElGamal in OpenPGP.

Remediation

Upgrade Ubuntu:18.04 libgcrypt20 to version 1.8.1-4ubuntu1.3 or higher.

References

low severity

Improper Certificate Validation

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.1-1ubuntu2.1~18.04.4 and openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.22

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 openssl@1.1.1-1ubuntu2.1~18.04.4
  • Introduced through: concourse/concourse@5.5.5 openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

A security vulnerability has been identified in all supported versions

of OpenSSL related to the verification of X.509 certificate chains that include policy constraints. Attackers may be able to exploit this vulnerability by creating a malicious certificate chain that triggers exponential use of computational resources, leading to a denial-of-service (DoS) attack on affected systems.

Policy processing is disabled by default but can be enabled by passing the -policy' argument to the command line utilities or by calling the X509_VERIFY_PARAM_set1_policies()' function.

Remediation

Upgrade Ubuntu:18.04 openssl to version 1.1.1-1ubuntu2.1~18.04.22 or higher.

References

low severity

Integer Overflow or Wraparound

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.1-1ubuntu2.1~18.04.4 and openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.8

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 openssl@1.1.1-1ubuntu2.1~18.04.4
  • Introduced through: concourse/concourse@5.5.5 openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

Calls to EVP_CipherUpdate, EVP_EncryptUpdate and EVP_DecryptUpdate may overflow the output length argument in some cases where the input length is close to the maximum permissable length for an integer on the platform. In such cases the return value from the function call will be 1 (indicating success), but the output length value will be negative. This could cause applications to behave incorrectly or crash. OpenSSL versions 1.1.1i and below are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1j. OpenSSL versions 1.0.2x and below are affected by this issue. However OpenSSL 1.0.2 is out of support and no longer receiving public updates. Premium support customers of OpenSSL 1.0.2 should upgrade to 1.0.2y. Other users should upgrade to 1.1.1j. Fixed in OpenSSL 1.1.1j (Affected 1.1.1-1.1.1i). Fixed in OpenSSL 1.0.2y (Affected 1.0.2-1.0.2x).

Remediation

Upgrade Ubuntu:18.04 openssl to version 1.1.1-1ubuntu2.1~18.04.8 or higher.

References

low severity

Out-of-bounds Read

  • Vulnerable module: pcre3/libpcre3
  • Introduced through: pcre3/libpcre3@2:8.39-9
  • Fixed in: 2:8.39-9ubuntu0.1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 pcre3/libpcre3@2:8.39-9

NVD Description

Note: Versions mentioned in the description apply only to the upstream pcre3 package and not the pcre3 package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

libpcre in PCRE before 8.43 allows a subject buffer over-read in JIT when UTF is disabled, and \X or \R has more than one fixed quantifier, a related issue to CVE-2019-20454.

Remediation

Upgrade Ubuntu:18.04 pcre3 to version 2:8.39-9ubuntu0.1 or higher.

References

low severity

Uncontrolled Recursion

  • Vulnerable module: pcre3/libpcre3
  • Introduced through: pcre3/libpcre3@2:8.39-9

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 pcre3/libpcre3@2:8.39-9

NVD Description

Note: Versions mentioned in the description apply only to the upstream pcre3 package and not the pcre3 package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

In PCRE 8.41, the OP_KETRMAX feature in the match function in pcre_exec.c allows stack exhaustion (uncontrolled recursion) when processing a crafted regular expression.

Remediation

There is no fixed version for Ubuntu:18.04 pcre3.

References

low severity

Buffer Overflow

  • Vulnerable module: perl/perl-base
  • Introduced through: perl/perl-base@5.26.1-6ubuntu0.3
  • Fixed in: 5.26.1-6ubuntu0.5

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 perl/perl-base@5.26.1-6ubuntu0.3

NVD Description

Note: Versions mentioned in the description apply only to the upstream perl package and not the perl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

regcomp.c in Perl before 5.30.3 allows a buffer overflow via a crafted regular expression because of recursive S_study_chunk calls.

Remediation

Upgrade Ubuntu:18.04 perl to version 5.26.1-6ubuntu0.5 or higher.

References

low severity

NULL Pointer Dereference

  • Vulnerable module: tar
  • Introduced through: tar@1.29b-2ubuntu0.1
  • Fixed in: 1.29b-2ubuntu0.2

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 tar@1.29b-2ubuntu0.1

NVD Description

Note: Versions mentioned in the description apply only to the upstream tar package and not the tar package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

pax_decode_header in sparse.c in GNU Tar before 1.32 had a NULL pointer dereference when parsing certain archives that have malformed extended headers.

Remediation

Upgrade Ubuntu:18.04 tar to version 1.29b-2ubuntu0.2 or higher.

References

low severity

Out-of-bounds Read

  • Vulnerable module: ncurses/libncurses5
  • Introduced through: ncurses/libncurses5@6.1-1ubuntu1.18.04, ncurses/libncursesw5@6.1-1ubuntu1.18.04 and others
  • Fixed in: 6.1-1ubuntu1.18.04.1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 ncurses/libncurses5@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse@5.5.5 ncurses/libncursesw5@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse@5.5.5 ncurses/libtinfo5@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse@5.5.5 ncurses/ncurses-base@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse@5.5.5 ncurses/ncurses-bin@6.1-1ubuntu1.18.04

NVD Description

Note: Versions mentioned in the description apply only to the upstream ncurses package and not the ncurses package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

ncurses 6.3 before patch 20220416 has an out-of-bounds read and segmentation violation in convert_strings in tinfo/read_entry.c in the terminfo library.

Remediation

Upgrade Ubuntu:18.04 ncurses to version 6.1-1ubuntu1.18.04.1 or higher.

References

low severity

Use After Free

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1, glibc/libc6@2.27-3ubuntu1 and others
  • Fixed in: 2.27-3ubuntu1.2

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/multiarch-support@2.27-3ubuntu1

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

A use-after-free vulnerability introduced in glibc upstream version 2.14 was found in the way the tilde expansion was carried out. Directory paths containing an initial tilde followed by a valid username were affected by this issue. A local attacker could exploit this flaw by creating a specially crafted path that, when processed by the glob function, would potentially lead to arbitrary code execution. This was fixed in version 2.32.

Remediation

Upgrade Ubuntu:18.04 glibc to version 2.27-3ubuntu1.2 or higher.

References

low severity

Improper Input Validation

  • Vulnerable module: coreutils
  • Introduced through: coreutils@8.28-1ubuntu1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 coreutils@8.28-1ubuntu1

NVD Description

Note: Versions mentioned in the description apply only to the upstream coreutils package and not the coreutils package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

chroot in GNU coreutils, when used with --userspec, allows local users to escape to the parent session via a crafted TIOCSTI ioctl call, which pushes characters to the terminal's input buffer.

Remediation

There is no fixed version for Ubuntu:18.04 coreutils.

References

low severity

NULL Pointer Dereference

  • Vulnerable module: gnutls28/libgnutls30
  • Introduced through: gnutls28/libgnutls30@3.5.18-1ubuntu1.1
  • Fixed in: 3.5.18-1ubuntu1.6

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 gnutls28/libgnutls30@3.5.18-1ubuntu1.1

NVD Description

Note: Versions mentioned in the description apply only to the upstream gnutls28 package and not the gnutls28 package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

A NULL pointer dereference flaw was found in GnuTLS. As Nettle's hash update functions internally call memcpy, providing zero-length input may cause undefined behavior. This flaw leads to a denial of service after authentication in rare circumstances.

Remediation

Upgrade Ubuntu:18.04 gnutls28 to version 3.5.18-1ubuntu1.6 or higher.

References

low severity

CVE-2023-50495

  • Vulnerable module: ncurses/libncurses5
  • Introduced through: ncurses/libncurses5@6.1-1ubuntu1.18.04, ncurses/libncursesw5@6.1-1ubuntu1.18.04 and others
  • Fixed in: 6.1-1ubuntu1.18.04.1+esm2

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 ncurses/libncurses5@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse@5.5.5 ncurses/libncursesw5@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse@5.5.5 ncurses/libtinfo5@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse@5.5.5 ncurses/ncurses-base@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse@5.5.5 ncurses/ncurses-bin@6.1-1ubuntu1.18.04

NVD Description

Note: Versions mentioned in the description apply only to the upstream ncurses package and not the ncurses package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

NCurse v6.4-20230418 was discovered to contain a segmentation fault via the component _nc_wrap_entry().

Remediation

Upgrade Ubuntu:18.04 ncurses to version 6.1-1ubuntu1.18.04.1+esm2 or higher.

References

low severity

Authentication Bypass

  • Vulnerable module: systemd/libsystemd0
  • Introduced through: systemd/libsystemd0@237-3ubuntu10.31 and systemd/libudev1@237-3ubuntu10.31
  • Fixed in: 237-3ubuntu10.49

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 systemd/libsystemd0@237-3ubuntu10.31
  • Introduced through: concourse/concourse@5.5.5 systemd/libudev1@237-3ubuntu10.31

NVD Description

Note: Versions mentioned in the description apply only to the upstream systemd package and not the systemd package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

An exploitable denial-of-service vulnerability exists in Systemd 245. A specially crafted DHCP FORCERENEW packet can cause a server running the DHCP client to be vulnerable to a DHCP ACK spoofing attack. An attacker can forge a pair of FORCERENEW and DCHP ACK packets to reconfigure the server.

Remediation

Upgrade Ubuntu:18.04 systemd to version 237-3ubuntu10.49 or higher.

References

low severity

Improper Data Handling

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1, glibc/libc6@2.27-3ubuntu1 and others

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/multiarch-support@2.27-3ubuntu1

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

The pop_fail_stack function in the GNU C Library (aka glibc or libc6) allows context-dependent attackers to cause a denial of service (assertion failure and application crash) via vectors related to extended regular expression processing.

Remediation

There is no fixed version for Ubuntu:18.04 glibc.

References

low severity

Improper Input Validation

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1, glibc/libc6@2.27-3ubuntu1 and others
  • Fixed in: 2.27-3ubuntu1.5

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/multiarch-support@2.27-3ubuntu1

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

The iconv program in the GNU C Library (aka glibc or libc6) 2.31 and earlier, when invoked with multiple suffixes in the destination encoding (TRANSLATE or IGNORE) along with the -c option, enters an infinite loop when processing invalid multi-byte input sequences, leading to a denial of service.

Remediation

Upgrade Ubuntu:18.04 glibc to version 2.27-3ubuntu1.5 or higher.

References

low severity

Out-of-bounds Read

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1, glibc/libc6@2.27-3ubuntu1 and others
  • Fixed in: 2.27-3ubuntu1.5

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/multiarch-support@2.27-3ubuntu1

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

The iconv feature in the GNU C Library (aka glibc or libc6) through 2.32, when processing invalid multi-byte input sequences in the EUC-KR encoding, may have a buffer over-read.

Remediation

Upgrade Ubuntu:18.04 glibc to version 2.27-3ubuntu1.5 or higher.

References

low severity

Use After Free

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1, glibc/libc6@2.27-3ubuntu1 and others
  • Fixed in: 2.27-3ubuntu1.6+esm1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/multiarch-support@2.27-3ubuntu1

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

A flaw was found in glibc. In an uncommon situation, the gaih_inet function may use memory that has been freed, resulting in an application crash. This issue is only exploitable when the getaddrinfo function is called and the hosts database in /etc/nsswitch.conf is configured with SUCCESS=continue or SUCCESS=merge.

Remediation

Upgrade Ubuntu:18.04 glibc to version 2.27-3ubuntu1.6+esm1 or higher.

References

low severity

Use After Free

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1, glibc/libc6@2.27-3ubuntu1 and others
  • Fixed in: 2.27-3ubuntu1.6+esm1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/multiarch-support@2.27-3ubuntu1

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

A flaw was found in glibc. In an extremely rare situation, the getaddrinfo function may access memory that has been freed, resulting in an application crash. This issue is only exploitable when a NSS module implements only the nss_gethostbyname2_r and nss_getcanonname_r hooks without implementing the nss*_gethostbyname3_r hook. The resolved name should return a large number of IPv6 and IPv4, and the call to the getaddrinfo function should have the AF_INET6 address family with AI_CANONNAME, AI_ALL and AI_V4MAPPED as flags.

Remediation

Upgrade Ubuntu:18.04 glibc to version 2.27-3ubuntu1.6+esm1 or higher.

References

low severity

Information Exposure

  • Vulnerable module: nettle/libhogweed4
  • Introduced through: nettle/libhogweed4@3.4-1 and nettle/libnettle6@3.4-1
  • Fixed in: 3.4.1-0ubuntu0.18.04.1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 nettle/libhogweed4@3.4-1
  • Introduced through: concourse/concourse@5.5.5 nettle/libnettle6@3.4-1

NVD Description

Note: Versions mentioned in the description apply only to the upstream nettle package and not the nettle package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

A Bleichenbacher type side-channel based padding oracle attack was found in the way nettle handles endian conversion of RSA decrypted PKCS#1 v1.5 data. An attacker who is able to run a process on the same physical core as the victim process, could use this flaw extract plaintext or in some cases downgrade any TLS connections to a vulnerable server.

Remediation

Upgrade Ubuntu:18.04 nettle to version 3.4.1-0ubuntu0.18.04.1 or higher.

References

low severity

Information Exposure

  • Vulnerable module: gnutls28/libgnutls30
  • Introduced through: gnutls28/libgnutls30@3.5.18-1ubuntu1.1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 gnutls28/libgnutls30@3.5.18-1ubuntu1.1

NVD Description

Note: Versions mentioned in the description apply only to the upstream gnutls28 package and not the gnutls28 package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

A Bleichenbacher type side-channel based padding oracle attack was found in the way gnutls handles verification of RSA decrypted PKCS#1 v1.5 data. An attacker who is able to run process on the same physical core as the victim process, could use this to extract plaintext or in some cases downgrade any TLS connections to a vulnerable server.

Remediation

There is no fixed version for Ubuntu:18.04 gnutls28.

References

low severity

Loop with Unreachable Exit Condition ('Infinite Loop')

  • Vulnerable module: elfutils/libelf1
  • Introduced through: elfutils/libelf1@0.170-0.4ubuntu0.1
  • Fixed in: 0.170-0.4ubuntu0.1+esm1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 elfutils/libelf1@0.170-0.4ubuntu0.1

NVD Description

Note: Versions mentioned in the description apply only to the upstream elfutils package and not the elfutils package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

In elfutils 0.183, an infinite loop was found in the function handle_symtab in readelf.c .Which allows attackers to cause a denial of service (infinite loop) via crafted file.

Remediation

Upgrade Ubuntu:18.04 elfutils to version 0.170-0.4ubuntu0.1+esm1 or higher.

References

low severity

Loop with Unreachable Exit Condition ('Infinite Loop')

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1, glibc/libc6@2.27-3ubuntu1 and others
  • Fixed in: 2.27-3ubuntu1.5

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/multiarch-support@2.27-3ubuntu1

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

The iconv function in the GNU C Library (aka glibc or libc6) 2.32 and earlier, when processing invalid multi-byte input sequences in IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 encodings, fails to advance the input state, which could lead to an infinite loop in applications, resulting in a denial of service, a different vulnerability from CVE-2016-10228.

Remediation

Upgrade Ubuntu:18.04 glibc to version 2.27-3ubuntu1.5 or higher.

References

low severity

Out-of-Bounds

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1, glibc/libc6@2.27-3ubuntu1 and others
  • Fixed in: 2.27-3ubuntu1.2

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/multiarch-support@2.27-3ubuntu1

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

The GNU C Library (aka glibc or libc6) before 2.32 could overflow an on-stack buffer during range reduction if an input to an 80-bit long double function contains a non-canonical bit pattern, a seen when passing a 0x5d414141414141410000 value to sinl on x86 targets. This is related to sysdeps/ieee754/ldbl-96/e_rem_pio2l.c.

Remediation

Upgrade Ubuntu:18.04 glibc to version 2.27-3ubuntu1.2 or higher.

References

low severity

CVE-2024-0727

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.1-1ubuntu2.1~18.04.4 and openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.23+esm4

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 openssl@1.1.1-1ubuntu2.1~18.04.4
  • Introduced through: concourse/concourse@5.5.5 openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

Issue summary: Processing a maliciously formatted PKCS12 file may lead OpenSSL to crash leading to a potential Denial of Service attack

Impact summary: Applications loading files in the PKCS12 format from untrusted sources might terminate abruptly.

A file in PKCS12 format can contain certificates and keys and may come from an untrusted source. The PKCS12 specification allows certain fields to be NULL, but OpenSSL does not correctly check for this case. This can lead to a NULL pointer dereference that results in OpenSSL crashing. If an application processes PKCS12 files from an untrusted source using the OpenSSL APIs then that application will be vulnerable to this issue.

OpenSSL APIs that are vulnerable to this are: PKCS12_parse(), PKCS12_unpack_p7data(), PKCS12_unpack_p7encdata(), PKCS12_unpack_authsafes() and PKCS12_newpass().

We have also fixed a similar issue in SMIME_write_PKCS7(). However since this function is related to writing data we do not consider it security significant.

The FIPS modules in 3.2, 3.1 and 3.0 are not affected by this issue.

Remediation

Upgrade Ubuntu:18.04 openssl to version 1.1.1-1ubuntu2.1~18.04.23+esm4 or higher.

References

low severity

Improper Authentication

  • Vulnerable module: shadow/login
  • Introduced through: shadow/login@1:4.5-1ubuntu2 and shadow/passwd@1:4.5-1ubuntu2
  • Fixed in: 1:4.5-1ubuntu2.5+esm1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 shadow/login@1:4.5-1ubuntu2
  • Introduced through: concourse/concourse@5.5.5 shadow/passwd@1:4.5-1ubuntu2

NVD Description

Note: Versions mentioned in the description apply only to the upstream shadow package and not the shadow package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

A flaw was found in shadow-utils. When asking for a new password, shadow-utils asks the password twice. If the password fails on the second attempt, shadow-utils fails in cleaning the buffer used to store the first entry. This may allow an attacker with enough access to retrieve the password from the memory.

Remediation

Upgrade Ubuntu:18.04 shadow to version 1:4.5-1ubuntu2.5+esm1 or higher.

References

low severity

Out-of-bounds Read

  • Vulnerable module: tar
  • Introduced through: tar@1.29b-2ubuntu0.1
  • Fixed in: 1.29b-2ubuntu0.3

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 tar@1.29b-2ubuntu0.1

NVD Description

Note: Versions mentioned in the description apply only to the upstream tar package and not the tar package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

A flaw was found in the src/list.c of tar 1.33 and earlier. This flaw allows an attacker who can submit a crafted input file to tar to cause uncontrolled consumption of memory. The highest threat from this vulnerability is to system availability.

Remediation

Upgrade Ubuntu:18.04 tar to version 1.29b-2ubuntu0.3 or higher.

References

low severity

Out-of-bounds Read

  • Vulnerable module: ncurses/libncurses5
  • Introduced through: ncurses/libncurses5@6.1-1ubuntu1.18.04, ncurses/libncursesw5@6.1-1ubuntu1.18.04 and others
  • Fixed in: 6.1-1ubuntu1.18.04.1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 ncurses/libncurses5@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse@5.5.5 ncurses/libncursesw5@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse@5.5.5 ncurses/libtinfo5@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse@5.5.5 ncurses/ncurses-base@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse@5.5.5 ncurses/ncurses-bin@6.1-1ubuntu1.18.04

NVD Description

Note: Versions mentioned in the description apply only to the upstream ncurses package and not the ncurses package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

There is a heap-based buffer over-read in the fmt_entry function in tinfo/comp_hash.c in the terminfo library in ncurses before 6.1-20191012.

Remediation

Upgrade Ubuntu:18.04 ncurses to version 6.1-1ubuntu1.18.04.1 or higher.

References

low severity

Out-of-bounds Read

  • Vulnerable module: ncurses/libncurses5
  • Introduced through: ncurses/libncurses5@6.1-1ubuntu1.18.04, ncurses/libncursesw5@6.1-1ubuntu1.18.04 and others
  • Fixed in: 6.1-1ubuntu1.18.04.1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 ncurses/libncurses5@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse@5.5.5 ncurses/libncursesw5@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse@5.5.5 ncurses/libtinfo5@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse@5.5.5 ncurses/ncurses-base@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse@5.5.5 ncurses/ncurses-bin@6.1-1ubuntu1.18.04

NVD Description

Note: Versions mentioned in the description apply only to the upstream ncurses package and not the ncurses package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

There is a heap-based buffer over-read in the _nc_find_entry function in tinfo/comp_hash.c in the terminfo library in ncurses before 6.1-20191012.

Remediation

Upgrade Ubuntu:18.04 ncurses to version 6.1-1ubuntu1.18.04.1 or higher.

References

low severity

Excessive Iteration

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.1-1ubuntu2.1~18.04.4 and openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.23+esm3

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 openssl@1.1.1-1ubuntu2.1~18.04.4
  • Introduced through: concourse/concourse@5.5.5 openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

Issue summary: Checking excessively long DH keys or parameters may be very slow.

Impact summary: Applications that use the functions DH_check(), DH_check_ex() or EVP_PKEY_param_check() to check a DH key or DH parameters may experience long delays. Where the key or parameters that are being checked have been obtained from an untrusted source this may lead to a Denial of Service.

The function DH_check() performs various checks on DH parameters. After fixing CVE-2023-3446 it was discovered that a large q parameter value can also trigger an overly long computation during some of these checks. A correct q value, if present, cannot be larger than the modulus p parameter, thus it is unnecessary to perform these checks if q is larger than p.

An application that calls DH_check() and supplies a key or parameters obtained from an untrusted source could be vulnerable to a Denial of Service attack.

The function DH_check() is itself called by a number of other OpenSSL functions. An application calling any of those other functions may similarly be affected. The other functions affected by this are DH_check_ex() and EVP_PKEY_param_check().

Also vulnerable are the OpenSSL dhparam and pkeyparam command line applications when using the "-check" option.

The OpenSSL SSL/TLS implementation is not affected by this issue.

The OpenSSL 3.0 and 3.1 FIPS providers are not affected by this issue.

Remediation

Upgrade Ubuntu:18.04 openssl to version 1.1.1-1ubuntu2.1~18.04.23+esm3 or higher.

References

low severity

Improper Certificate Validation

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.1-1ubuntu2.1~18.04.4 and openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.22

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 openssl@1.1.1-1ubuntu2.1~18.04.4
  • Introduced through: concourse/concourse@5.5.5 openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

The function X509_VERIFY_PARAM_add0_policy() is documented to implicitly enable the certificate policy check when doing certificate verification. However the implementation of the function does not enable the check which allows certificates with invalid or incorrect policies to pass the certificate verification.

As suddenly enabling the policy check could break existing deployments it was decided to keep the existing behavior of the X509_VERIFY_PARAM_add0_policy() function.

Instead the applications that require OpenSSL to perform certificate policy check need to use X509_VERIFY_PARAM_set1_policies() or explicitly enable the policy check by calling X509_VERIFY_PARAM_set_flags() with the X509_V_FLAG_POLICY_CHECK flag argument.

Certificate policy checks are disabled by default in OpenSSL and are not commonly used by applications.

Remediation

Upgrade Ubuntu:18.04 openssl to version 1.1.1-1ubuntu2.1~18.04.22 or higher.

References

low severity

Improper Certificate Validation

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.1-1ubuntu2.1~18.04.4 and openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.22

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 openssl@1.1.1-1ubuntu2.1~18.04.4
  • Introduced through: concourse/concourse@5.5.5 openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

Applications that use a non-default option when verifying certificates may be vulnerable to an attack from a malicious CA to circumvent certain checks.

Invalid certificate policies in leaf certificates are silently ignored by OpenSSL and other certificate policy checks are skipped for that certificate. A malicious CA could use this to deliberately assert invalid certificate policies in order to circumvent policy checking on the certificate altogether.

Policy processing is disabled by default but can be enabled by passing the -policy' argument to the command line utilities or by calling the X509_VERIFY_PARAM_set1_policies()' function.

Remediation

Upgrade Ubuntu:18.04 openssl to version 1.1.1-1ubuntu2.1~18.04.22 or higher.

References

low severity

Improper Check for Unusual or Exceptional Conditions

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.1-1ubuntu2.1~18.04.4 and openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.23+esm4

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 openssl@1.1.1-1ubuntu2.1~18.04.4
  • Introduced through: concourse/concourse@5.5.5 openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

Issue summary: Generating excessively long X9.42 DH keys or checking excessively long X9.42 DH keys or parameters may be very slow.

Impact summary: Applications that use the functions DH_generate_key() to generate an X9.42 DH key may experience long delays. Likewise, applications that use DH_check_pub_key(), DH_check_pub_key_ex() or EVP_PKEY_public_check() to check an X9.42 DH key or X9.42 DH parameters may experience long delays. Where the key or parameters that are being checked have been obtained from an untrusted source this may lead to a Denial of Service.

While DH_check() performs all the necessary checks (as of CVE-2023-3817), DH_check_pub_key() doesn't make any of these checks, and is therefore vulnerable for excessively large P and Q parameters.

Likewise, while DH_generate_key() performs a check for an excessively large P, it doesn't check for an excessively large Q.

An application that calls DH_generate_key() or DH_check_pub_key() and supplies a key or parameters obtained from an untrusted source could be vulnerable to a Denial of Service attack.

DH_generate_key() and DH_check_pub_key() are also called by a number of other OpenSSL functions. An application calling any of those other functions may similarly be affected. The other functions affected by this are DH_check_pub_key_ex(), EVP_PKEY_public_check(), and EVP_PKEY_generate().

Also vulnerable are the OpenSSL pkey command line application when using the "-pubcheck" option, as well as the OpenSSL genpkey command line application.

The OpenSSL SSL/TLS implementation is not affected by this issue.

The OpenSSL 3.0 and 3.1 FIPS providers are not affected by this issue.

Remediation

Upgrade Ubuntu:18.04 openssl to version 1.1.1-1ubuntu2.1~18.04.23+esm4 or higher.

References

low severity

Inefficient Regular Expression Complexity

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.1-1ubuntu2.1~18.04.4 and openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.23+esm3

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 openssl@1.1.1-1ubuntu2.1~18.04.4
  • Introduced through: concourse/concourse@5.5.5 openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

Issue summary: Checking excessively long DH keys or parameters may be very slow.

Impact summary: Applications that use the functions DH_check(), DH_check_ex() or EVP_PKEY_param_check() to check a DH key or DH parameters may experience long delays. Where the key or parameters that are being checked have been obtained from an untrusted source this may lead to a Denial of Service.

The function DH_check() performs various checks on DH parameters. One of those checks confirms that the modulus ('p' parameter) is not too large. Trying to use a very large modulus is slow and OpenSSL will not normally use a modulus which is over 10,000 bits in length.

However the DH_check() function checks numerous aspects of the key or parameters that have been supplied. Some of those checks use the supplied modulus value even if it has already been found to be too large.

An application that calls DH_check() and supplies a key or parameters obtained from an untrusted source could be vulernable to a Denial of Service attack.

The function DH_check() is itself called by a number of other OpenSSL functions. An application calling any of those other functions may similarly be affected. The other functions affected by this are DH_check_ex() and EVP_PKEY_param_check().

Also vulnerable are the OpenSSL dhparam and pkeyparam command line applications when using the '-check' option.

The OpenSSL SSL/TLS implementation is not affected by this issue. The OpenSSL 3.0 and 3.1 FIPS providers are not affected by this issue.

Remediation

Upgrade Ubuntu:18.04 openssl to version 1.1.1-1ubuntu2.1~18.04.23+esm3 or higher.

References

low severity

Information Exposure

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.1-1ubuntu2.1~18.04.4 and openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.6

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 openssl@1.1.1-1ubuntu2.1~18.04.4
  • Introduced through: concourse/concourse@5.5.5 openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

There is an overflow bug in the x64_64 Montgomery squaring procedure used in exponentiation with 512-bit moduli. No EC algorithms are affected. Analysis suggests that attacks against 2-prime RSA1024, 3-prime RSA1536, and DSA1024 as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH512 are considered just feasible. However, for an attack the target would have to re-use the DH512 private key, which is not recommended anyway. Also applications directly using the low level API BN_mod_exp may be affected if they use BN_FLG_CONSTTIME. Fixed in OpenSSL 1.1.1e (Affected 1.1.1-1.1.1d). Fixed in OpenSSL 1.0.2u (Affected 1.0.2-1.0.2t).

Remediation

Upgrade Ubuntu:18.04 openssl to version 1.1.1-1ubuntu2.1~18.04.6 or higher.

References

low severity

Use of Insufficiently Random Values

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.1-1ubuntu2.1~18.04.4 and openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.6

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 openssl@1.1.1-1ubuntu2.1~18.04.4
  • Introduced through: concourse/concourse@5.5.5 openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

OpenSSL 1.1.1 introduced a rewritten random number generator (RNG). This was intended to include protection in the event of a fork() system call in order to ensure that the parent and child processes did not share the same RNG state. However this protection was not being used in the default case. A partial mitigation for this issue is that the output from a high precision timer is mixed into the RNG state so the likelihood of a parent and child process sharing state is significantly reduced. If an application already calls OPENSSL_init_crypto() explicitly using OPENSSL_INIT_ATFORK then this problem does not occur at all. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c).

Remediation

Upgrade Ubuntu:18.04 openssl to version 1.1.1-1ubuntu2.1~18.04.6 or higher.

References

low severity

Integer Overflow or Wraparound

  • Vulnerable module: pcre3/libpcre3
  • Introduced through: pcre3/libpcre3@2:8.39-9
  • Fixed in: 2:8.39-9ubuntu0.1

low severity

Incorrect Permission Assignment for Critical Resource

  • Vulnerable module: shadow/login
  • Introduced through: shadow/login@1:4.5-1ubuntu2 and shadow/passwd@1:4.5-1ubuntu2
  • Fixed in: 1:4.5-1ubuntu2.2

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 shadow/login@1:4.5-1ubuntu2
  • Introduced through: concourse/concourse@5.5.5 shadow/passwd@1:4.5-1ubuntu2

NVD Description

Note: Versions mentioned in the description apply only to the upstream shadow package and not the shadow package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

An issue was discovered in shadow 4.5. newgidmap (in shadow-utils) is setuid and allows an unprivileged user to be placed in a user namespace where setgroups(2) is permitted. This allows an attacker to remove themselves from a supplementary group, which may allow access to certain filesystem paths if the administrator has used "group blacklisting" (e.g., chmod g-rwx) to restrict access to paths. This flaw effectively reverts a security feature in the kernel (in particular, the /proc/self/setgroups knob) to prevent this sort of privilege escalation.

Remediation

Upgrade Ubuntu:18.04 shadow to version 1:4.5-1ubuntu2.2 or higher.

References

low severity

Reachable Assertion

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1, glibc/libc6@2.27-3ubuntu1 and others
  • Fixed in: 2.27-3ubuntu1.5

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/multiarch-support@2.27-3ubuntu1

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

The iconv function in the GNU C Library (aka glibc or libc6) 2.30 to 2.32, when converting UCS4 text containing an irreversible character, fails an assertion in the code path and aborts the program, potentially resulting in a denial of service.

Remediation

Upgrade Ubuntu:18.04 glibc to version 2.27-3ubuntu1.5 or higher.

References

low severity

CVE-2019-1547

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.1-1ubuntu2.1~18.04.4 and openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.6

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 openssl@1.1.1-1ubuntu2.1~18.04.4
  • Introduced through: concourse/concourse@5.5.5 openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

Normally in OpenSSL EC groups always have a co-factor present and this is used in side channel resistant code paths. However, in some cases, it is possible to construct a group using explicit parameters (instead of using a named curve). In those cases it is possible that such a group does not have the cofactor present. This can occur even where all the parameters match a known named curve. If such a curve is used then OpenSSL falls back to non-side channel resistant code paths which may result in full key recovery during an ECDSA signature operation. In order to be vulnerable an attacker would have to have the ability to time the creation of a large number of signatures where explicit parameters with no co-factor present are in use by an application using libcrypto. For the avoidance of doubt libssl is not vulnerable because explicit parameters are never used. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c). Fixed in OpenSSL 1.1.0l (Affected 1.1.0-1.1.0k). Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s).

Remediation

Upgrade Ubuntu:18.04 openssl to version 1.1.1-1ubuntu2.1~18.04.6 or higher.

References

low severity

Time-of-check Time-of-use (TOCTOU)

  • Vulnerable module: shadow/login
  • Introduced through: shadow/login@1:4.5-1ubuntu2 and shadow/passwd@1:4.5-1ubuntu2

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 shadow/login@1:4.5-1ubuntu2
  • Introduced through: concourse/concourse@5.5.5 shadow/passwd@1:4.5-1ubuntu2

NVD Description

Note: Versions mentioned in the description apply only to the upstream shadow package and not the shadow package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

shadow: TOCTOU (time-of-check time-of-use) race condition when copying and removing directory trees

Remediation

There is no fixed version for Ubuntu:18.04 shadow.

References

low severity

Loop with Unreachable Exit Condition ('Infinite Loop')

  • Vulnerable module: tar
  • Introduced through: tar@1.29b-2ubuntu0.1
  • Fixed in: 1.29b-2ubuntu0.2

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 tar@1.29b-2ubuntu0.1

NVD Description

Note: Versions mentioned in the description apply only to the upstream tar package and not the tar package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

GNU Tar through 1.30, when --sparse is used, mishandles file shrinkage during read access, which allows local users to cause a denial of service (infinite read loop in sparse_dump_region in sparse.c) by modifying a file that is supposed to be archived by a different user's process (e.g., a system backup running as root).

Remediation

Upgrade Ubuntu:18.04 tar to version 1.29b-2ubuntu0.2 or higher.

References

low severity

Use of a Broken or Risky Cryptographic Algorithm

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.1-1ubuntu2.1~18.04.4 and openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.6

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 openssl@1.1.1-1ubuntu2.1~18.04.4
  • Introduced through: concourse/concourse@5.5.5 openssl/libssl1.1@1.1.1-1ubuntu2.1~18.04.4

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

In situations where an attacker receives automated notification of the success or failure of a decryption attempt an attacker, after sending a very large number of messages to be decrypted, can recover a CMS/PKCS7 transported encryption key or decrypt any RSA encrypted message that was encrypted with the public RSA key, using a Bleichenbacher padding oracle attack. Applications are not affected if they use a certificate together with the private RSA key to the CMS_decrypt or PKCS7_decrypt functions to select the correct recipient info to decrypt. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c). Fixed in OpenSSL 1.1.0l (Affected 1.1.0-1.1.0k). Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s).

Remediation

Upgrade Ubuntu:18.04 openssl to version 1.1.1-1ubuntu2.1~18.04.6 or higher.

References

low severity

Information Exposure

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1, glibc/libc6@2.27-3ubuntu1 and others
  • Fixed in: 2.27-3ubuntu1.2

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse@5.5.5 glibc/multiarch-support@2.27-3ubuntu1

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

On the x86-64 architecture, the GNU C Library (aka glibc) before 2.31 fails to ignore the LD_PREFER_MAP_32BIT_EXEC environment variable during program execution after a security transition, allowing local attackers to restrict the possible mapping addresses for loaded libraries and thus bypass ASLR for a setuid program.

Remediation

Upgrade Ubuntu:18.04 glibc to version 2.27-3ubuntu1.2 or higher.

References

low severity

Out-of-bounds Write

  • Vulnerable module: gnupg2/gpgv
  • Introduced through: gnupg2/gpgv@2.2.4-1ubuntu1.2

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 gnupg2/gpgv@2.2.4-1ubuntu1.2

NVD Description

Note: Versions mentioned in the description apply only to the upstream gnupg2 package and not the gnupg2 package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

GnuPG can be made to spin on a relatively small input by (for example) crafting a public key with thousands of signatures attached, compressed down to just a few KB.

Remediation

There is no fixed version for Ubuntu:18.04 gnupg2.

References

low severity

Out-of-bounds Read

  • Vulnerable module: libsepol/libsepol1
  • Introduced through: libsepol/libsepol1@2.7-1
  • Fixed in: 2.7-1ubuntu0.1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 libsepol/libsepol1@2.7-1

NVD Description

Note: Versions mentioned in the description apply only to the upstream libsepol package and not the libsepol package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

The CIL compiler in SELinux 3.2 has a heap-based buffer over-read in ebitmap_match_any (called indirectly from cil_check_neverallow). This occurs because there is sometimes a lack of checks for invalid statements in an optional block.

Remediation

Upgrade Ubuntu:18.04 libsepol to version 2.7-1ubuntu0.1 or higher.

References

low severity

Use After Free

  • Vulnerable module: libsepol/libsepol1
  • Introduced through: libsepol/libsepol1@2.7-1
  • Fixed in: 2.7-1ubuntu0.1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 libsepol/libsepol1@2.7-1

NVD Description

Note: Versions mentioned in the description apply only to the upstream libsepol package and not the libsepol package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

The CIL compiler in SELinux 3.2 has a use-after-free in cil_reset_classpermission (called from cil_reset_classperms_set and cil_reset_classperms_list).

Remediation

Upgrade Ubuntu:18.04 libsepol to version 2.7-1ubuntu0.1 or higher.

References

low severity

Use After Free

  • Vulnerable module: libsepol/libsepol1
  • Introduced through: libsepol/libsepol1@2.7-1
  • Fixed in: 2.7-1ubuntu0.1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 libsepol/libsepol1@2.7-1

NVD Description

Note: Versions mentioned in the description apply only to the upstream libsepol package and not the libsepol package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

The CIL compiler in SELinux 3.2 has a use-after-free in __cil_verify_classperms (called from __cil_verify_classpermission and __cil_pre_verify_helper).

Remediation

Upgrade Ubuntu:18.04 libsepol to version 2.7-1ubuntu0.1 or higher.

References

low severity

Use After Free

  • Vulnerable module: libsepol/libsepol1
  • Introduced through: libsepol/libsepol1@2.7-1
  • Fixed in: 2.7-1ubuntu0.1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 libsepol/libsepol1@2.7-1

NVD Description

Note: Versions mentioned in the description apply only to the upstream libsepol package and not the libsepol package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

The CIL compiler in SELinux 3.2 has a use-after-free in __cil_verify_classperms (called from __verify_map_perm_classperms and hashtab_map).

Remediation

Upgrade Ubuntu:18.04 libsepol to version 2.7-1ubuntu0.1 or higher.

References

low severity

Out-of-bounds Write

  • Vulnerable module: procps
  • Introduced through: procps@2:3.3.12-3ubuntu1.2 and procps/libprocps6@2:3.3.12-3ubuntu1.2
  • Fixed in: 2:3.3.12-3ubuntu1.2+esm1

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 procps@2:3.3.12-3ubuntu1.2
  • Introduced through: concourse/concourse@5.5.5 procps/libprocps6@2:3.3.12-3ubuntu1.2

NVD Description

Note: Versions mentioned in the description apply only to the upstream procps package and not the procps package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

Under some circumstances, this weakness allows a user who has access to run the “ps” utility on a machine, the ability to write almost unlimited amounts of unfiltered data into the process heap.

Remediation

Upgrade Ubuntu:18.04 procps to version 2:3.3.12-3ubuntu1.2+esm1 or higher.

References

low severity

Arbitrary Code Injection

  • Vulnerable module: shadow/login
  • Introduced through: shadow/login@1:4.5-1ubuntu2 and shadow/passwd@1:4.5-1ubuntu2

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 shadow/login@1:4.5-1ubuntu2
  • Introduced through: concourse/concourse@5.5.5 shadow/passwd@1:4.5-1ubuntu2

NVD Description

Note: Versions mentioned in the description apply only to the upstream shadow package and not the shadow package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

In Shadow 4.13, it is possible to inject control characters into fields provided to the SUID program chfn (change finger). Although it is not possible to exploit this directly (e.g., adding a new user fails because \n is in the block list), it is possible to misrepresent the /etc/passwd file when viewed. Use of \r manipulations and Unicode characters to work around blocking of the : character make it possible to give the impression that a new user has been added. In other words, an adversary may be able to convince a system administrator to take the system offline (an indirect, social-engineered denial of service) by demonstrating that "cat /etc/passwd" shows a rogue user account.

Remediation

There is no fixed version for Ubuntu:18.04 shadow.

References

low severity

Missing Release of Resource after Effective Lifetime

  • Vulnerable module: systemd/libsystemd0
  • Introduced through: systemd/libsystemd0@237-3ubuntu10.31 and systemd/libudev1@237-3ubuntu10.31
  • Fixed in: 237-3ubuntu10.38

Detailed paths

  • Introduced through: concourse/concourse@5.5.5 systemd/libsystemd0@237-3ubuntu10.31
  • Introduced through: concourse/concourse@5.5.5 systemd/libudev1@237-3ubuntu10.31

NVD Description

Note: Versions mentioned in the description apply only to the upstream systemd package and not the systemd package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

An issue was discovered in button_open in login/logind-button.c in systemd before 243. When executing the udevadm trigger command, a memory leak may occur.

Remediation

Upgrade Ubuntu:18.04 systemd to version 237-3ubuntu10.38 or higher.

References