Docker concourse/concourse:5.1

Vulnerabilities

87 via 168 paths

Dependencies

105

Source

Group 6 Copy Created with Sketch. Docker

Target OS

ubuntu:18.04
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Severity
  • 1
  • 30
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Status
  • 87
  • 0
  • 0

high severity

NULL Pointer Dereference

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.0g-2ubuntu4.3 and openssl/libssl1.1@1.1.0g-2ubuntu4.3
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.7

Detailed paths

  • Introduced through: concourse/concourse:5.1@* openssl@1.1.0g-2ubuntu4.3
  • Introduced through: concourse/concourse:5.1@* openssl/libssl1.1@1.1.0g-2ubuntu4.3

Overview

Affected versions of this package are vulnerable to NULL Pointer Dereference. 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 openssl to version or higher.

References

medium severity

Improper Input Validation

  • Vulnerable module: apt
  • Introduced through: apt@1.6.8 and apt/libapt-pkg5.0@1.6.8
  • Fixed in: 1.6.12ubuntu0.1

Detailed paths

  • Introduced through: concourse/concourse:5.1@* apt@1.6.8
  • Introduced through: concourse/concourse:5.1@* apt/libapt-pkg5.0@1.6.8

Overview

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.

References

medium severity

Integer Overflow or Wraparound

  • Vulnerable module: apt
  • Introduced through: apt@1.6.8 and apt/libapt-pkg5.0@1.6.8
  • Fixed in: 1.6.12ubuntu0.2

Detailed paths

  • Introduced through: concourse/concourse:5.1@* apt@1.6.8
  • Introduced through: concourse/concourse:5.1@* apt/libapt-pkg5.0@1.6.8

Overview

Affected versions of this package are vulnerable to Integer Overflow or Wraparound. 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 apt to version or higher.

References

medium severity

Out-of-bounds Write

  • Vulnerable module: bzip2
  • Introduced through: bzip2@1.0.6-8.1 and bzip2/libbz2-1.0@1.0.6-8.1
  • Fixed in: 1.0.6-8.1ubuntu0.2

Detailed paths

  • Introduced through: concourse/concourse:5.1@* bzip2@1.0.6-8.1
  • Introduced through: concourse/concourse:5.1@* bzip2/libbz2-1.0@1.0.6-8.1

Overview

BZ2_decompress in decompress.c in bzip2 through 1.0.6 has an out-of-bounds write when there are many selectors.

References

medium severity

Out-of-bounds Read

  • Vulnerable module: db5.3/libdb5.3
  • Introduced through: db5.3/libdb5.3@5.3.28-13.1ubuntu1
  • Fixed in: 5.3.28-13.1ubuntu1.1

Detailed paths

  • Introduced through: concourse/concourse:5.1@* db5.3/libdb5.3@5.3.28-13.1ubuntu1

medium severity

Out-of-bounds Write

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* e2fsprogs@1.44.1-1ubuntu1.1
  • Introduced through: concourse/concourse:5.1@* e2fsprogs/libcom-err2@1.44.1-1ubuntu1.1
  • Introduced through: concourse/concourse:5.1@* e2fsprogs/libext2fs2@1.44.1-1ubuntu1.1
  • Introduced through: concourse/concourse:5.1@* e2fsprogs/libss2@1.44.1-1ubuntu1.1

Overview

An exploitable code execution vulnerability exists in the quota file functionality of E2fsprogs 1.45.3. A specially crafted ext4 partition can cause an out-of-bounds write on the heap, resulting in code execution. An attacker can corrupt a partition to trigger this vulnerability.

References

medium severity

Out-of-bounds Write

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* e2fsprogs@1.44.1-1ubuntu1.1
  • Introduced through: concourse/concourse:5.1@* e2fsprogs/libcom-err2@1.44.1-1ubuntu1.1
  • Introduced through: concourse/concourse:5.1@* e2fsprogs/libext2fs2@1.44.1-1ubuntu1.1
  • Introduced through: concourse/concourse:5.1@* e2fsprogs/libss2@1.44.1-1ubuntu1.1

Overview

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.

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:5.1@* file@1:5.32-2ubuntu0.2
  • Introduced through: concourse/concourse:5.1@* file/libmagic-mgc@1:5.32-2ubuntu0.2
  • Introduced through: concourse/concourse:5.1@* file/libmagic1@1:5.32-2ubuntu0.2

Overview

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).

References

medium severity

Information Exposure

  • Vulnerable module: gcc-8/gcc-8-base
  • Introduced through: gcc-8/gcc-8-base@8.2.0-1ubuntu2~18.04, gcc-8/libgcc1@1:8.2.0-1ubuntu2~18.04 and others

Detailed paths

  • Introduced through: concourse/concourse:5.1@* gcc-8/gcc-8-base@8.2.0-1ubuntu2~18.04
  • Introduced through: concourse/concourse:5.1@* gcc-8/libgcc1@1:8.2.0-1ubuntu2~18.04
  • Introduced through: concourse/concourse:5.1@* gcc-8/libstdc++6@8.2.0-1ubuntu2~18.04

Overview

Affected versions of this package are vulnerable to Information Exposure. 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 gcc-8.

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:5.1@* glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/multiarch-support@2.27-3ubuntu1

Overview

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.

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:5.1@* glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/multiarch-support@2.27-3ubuntu1

Overview

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.

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:5.1@* glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/multiarch-support@2.27-3ubuntu1

Overview

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.

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:5.1@* glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/multiarch-support@2.27-3ubuntu1

Overview

Affected versions of this package are vulnerable to Out-of-bounds Write. 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 glibc to version or higher.

References

medium severity

Double Free

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* gnutls28/libgnutls30@3.5.18-1ubuntu1

Overview

A vulnerability was found in gnutls versions from 3.5.8 before 3.6.7. A memory corruption (double free) vulnerability in the certificate verification API. Any client or server application that verifies X.509 certificates with GnuTLS 3.5.8 or later is affected.

References

medium severity

Use of a Broken or Risky Cryptographic Algorithm

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* gnutls28/libgnutls30@3.5.18-1ubuntu1

Overview

It was found that the GnuTLS implementation of HMAC-SHA-384 was vulnerable to a Lucky thirteen style attack. Remote attackers could use this flaw to conduct distinguishing attacks and plain text recovery attacks via statistical analysis of timing data using crafted packets.

References

medium severity

Use of a Broken or Risky Cryptographic Algorithm

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* gnutls28/libgnutls30@3.5.18-1ubuntu1

Overview

A cache-based side channel in GnuTLS implementation that leads to plain text recovery in cross-VM attack setting was found. An attacker could use a combination of "Just in Time" Prime+probe attack in combination with Lucky-13 attack to recover plain text using crafted packets.

References

medium severity

Use of a Broken or Risky Cryptographic Algorithm

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* gnutls28/libgnutls30@3.5.18-1ubuntu1

Overview

It was found that the GnuTLS implementation of HMAC-SHA-256 was vulnerable to a Lucky thirteen style attack. Remote attackers could use this flaw to conduct distinguishing attacks and plaintext-recovery attacks via statistical analysis of timing data using crafted packets.

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:5.1@* iproute2@4.15.0-2ubuntu1

Overview

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.

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:5.1@* libgcrypt20@1.8.1-4ubuntu1.1

Overview

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.

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:5.1@* libidn2/libidn2-0@2.0.4-1.1build2

Overview

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.

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:5.1@* libidn2/libidn2-0@2.0.4-1.1build2

Overview

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.

References

medium severity

Access Restriction Bypass

  • Vulnerable module: libseccomp/libseccomp2
  • Introduced through: libseccomp/libseccomp2@2.3.1-2.1ubuntu4
  • Fixed in: 2.4.1-0ubuntu0.18.04.2

Detailed paths

  • Introduced through: concourse/concourse:5.1@* libseccomp/libseccomp2@2.3.1-2.1ubuntu4

Overview

libseccomp before 2.4.0 did not correctly generate 64-bit syscall argument comparisons using the arithmetic operators (LT, GT, LE, GE), which might able to lead to bypassing seccomp filters and potential privilege escalations.

References

medium severity

Race Condition

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* libzstd/libzstd1@1.3.3+dfsg-2ubuntu1

Overview

A race condition in the one-pass compression functions of Zstandard prior to version 1.3.8 could allow an attacker to write bytes out of bounds if an output buffer smaller than the recommended size was used.

References

medium severity
new

CVE-2021-23841

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.0g-2ubuntu4.3 and openssl/libssl1.1@1.1.0g-2ubuntu4.3
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.8

Detailed paths

  • Introduced through: concourse/concourse:5.1@* openssl@1.1.0g-2ubuntu4.3
  • Introduced through: concourse/concourse:5.1@* openssl/libssl1.1@1.1.0g-2ubuntu4.3

Overview

Affected versions of this package are vulnerable to CVE-2021-23841. 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 openssl to version 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:5.1@* p11-kit/libp11-kit0@0.23.9-2

Overview

Affected versions of this package are vulnerable to Integer Overflow or Wraparound. 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 p11-kit to version 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:5.1@* p11-kit/libp11-kit0@0.23.9-2

Overview

Affected versions of this package are vulnerable to Out-of-bounds Read. 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 p11-kit to version 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:5.1@* p11-kit/libp11-kit0@0.23.9-2

Overview

Affected versions of this package are vulnerable to Out-of-bounds Write. 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 p11-kit to version or higher.

References

medium severity

Access Restriction Bypass

  • Vulnerable module: systemd/libsystemd0
  • Introduced through: systemd/libsystemd0@237-3ubuntu10.13 and systemd/libudev1@237-3ubuntu10.13
  • Fixed in: 237-3ubuntu10.19

Detailed paths

  • Introduced through: concourse/concourse:5.1@* systemd/libsystemd0@237-3ubuntu10.13
  • Introduced through: concourse/concourse:5.1@* systemd/libudev1@237-3ubuntu10.13

Overview

In systemd before v242-rc4, it was discovered that pam_systemd does not properly sanitize the environment before using the XDG_SEAT variable. It is possible for an attacker, in some particular configurations, to set a XDG_SEAT environment variable which allows for commands to be checked against polkit policies using the "allow_active" element rather than "allow_any".

References

medium severity

Improper Access Control

  • Vulnerable module: systemd/libsystemd0
  • Introduced through: systemd/libsystemd0@237-3ubuntu10.13 and systemd/libudev1@237-3ubuntu10.13
  • Fixed in: 237-3ubuntu10.28

Detailed paths

  • Introduced through: concourse/concourse:5.1@* systemd/libsystemd0@237-3ubuntu10.13
  • Introduced through: concourse/concourse:5.1@* systemd/libudev1@237-3ubuntu10.13

Overview

In systemd 240, bus_open_system_watch_bind_with_description in shared/bus-util.c (as used by systemd-resolved to connect to the system D-Bus instance), calls sd_bus_set_trusted, which disables access controls for incoming D-Bus messages. An unprivileged user can exploit this by executing D-Bus methods that should be restricted to privileged users, in order to change the system's DNS resolver settings.

References

medium severity

Information Exposure

  • Vulnerable module: systemd/libsystemd0
  • Introduced through: systemd/libsystemd0@237-3ubuntu10.13 and systemd/libudev1@237-3ubuntu10.13

Detailed paths

  • Introduced through: concourse/concourse:5.1@* systemd/libsystemd0@237-3ubuntu10.13
  • Introduced through: concourse/concourse:5.1@* systemd/libudev1@237-3ubuntu10.13

Overview

systemd 242 changes the VT1 mode upon a logout, which allows attackers to read cleartext passwords in certain circumstances, such as watching a shutdown, or using Ctrl-Alt-F1 and Ctrl-Alt-F2. This occurs because the KDGKBMODE (aka current keyboard mode) check is mishandled.

References

medium severity

Use After Free

  • Vulnerable module: systemd/libsystemd0
  • Introduced through: systemd/libsystemd0@237-3ubuntu10.13 and systemd/libudev1@237-3ubuntu10.13
  • Fixed in: 237-3ubuntu10.38

Detailed paths

  • Introduced through: concourse/concourse:5.1@* systemd/libsystemd0@237-3ubuntu10.13
  • Introduced through: concourse/concourse:5.1@* systemd/libudev1@237-3ubuntu10.13

Overview

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.

References

low severity

Improper Check for Dropped Privileges

  • Vulnerable module: bash
  • Introduced through: bash@4.4.18-2ubuntu1

Detailed paths

  • Introduced through: concourse/concourse:5.1@* bash@4.4.18-2ubuntu1

Overview

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.

References

low severity

Improper Input Validation

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* coreutils@8.28-1ubuntu1

Overview

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.

References

low severity

Divide By Zero

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* elfutils/libelf1@0.170-0.4

Overview

Divide-by-zero vulnerabilities in the function arlib_add_symbols() in arlib.c in elfutils 0.174 allow remote attackers to cause a denial of service (application crash) with a crafted ELF file, as demonstrated by eu-ranlib, because a zero sh_entsize is mishandled.

References

low severity

Double Free

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* elfutils/libelf1@0.170-0.4

Overview

libelf/elf_end.c in elfutils 0.173 allows remote attackers to cause a denial of service (double free and application crash) or possibly have unspecified other impact because it tries to decompress twice.

References

low severity

Out-of-Bounds

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* elfutils/libelf1@0.170-0.4

Overview

An Invalid Memory Address Dereference exists in the function elf_end in libelf in elfutils through v0.174. Although eu-size is intended to support ar files inside ar files, handle_ar in size.c closes the outer ar file before handling all inner entries. The vulnerability allows attackers to cause a denial of service (application crash) with a crafted ELF file.

References

low severity

Out-of-Bounds

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* elfutils/libelf1@0.170-0.4

Overview

An invalid memory address dereference was discovered in dwfl_segment_report_module.c in libdwfl in elfutils through v0.174. The vulnerability allows attackers to cause a denial of service (application crash) with a crafted ELF file, as demonstrated by consider_notes.

References

low severity

Out-of-bounds Read

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* elfutils/libelf1@0.170-0.4

Overview

libdw in elfutils 0.173 checks the end of the attributes list incorrectly in dwarf_getabbrev in dwarf_getabbrev.c and dwarf_hasattr in dwarf_hasattr.c, leading to a heap-based buffer over-read and an application crash.

References

low severity

Out-of-bounds Read

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* elfutils/libelf1@0.170-0.4

Overview

dwarf_getaranges in dwarf_getaranges.c in libdw in elfutils before 2018-08-18 allows remote attackers to cause a denial of service (heap-based buffer over-read) via a crafted file.

References

low severity

Out-of-bounds Read

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* elfutils/libelf1@0.170-0.4

Overview

In elfutils 0.175, a heap-based buffer over-read was discovered in the function elf32_xlatetom in elf32_xlatetom.c in libelf. A crafted ELF input can cause a segmentation fault leading to denial of service (program crash) because ebl_core_note does not reject malformed core file notes.

References

low severity

Out-of-bounds Read

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* elfutils/libelf1@0.170-0.4

Overview

An issue was discovered in elfutils 0.175. A segmentation fault can occur in the function elf64_xlatetom in libelf/elf32_xlatetom.c, due to dwfl_segment_report_module not checking whether the dyn data read from a core file is truncated. A crafted input can cause a program crash, leading to denial-of-service, as demonstrated by eu-stack.

References

low severity

Out-of-bounds Read

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* elfutils/libelf1@0.170-0.4

Overview

A heap-based buffer over-read was discovered in the function read_srclines in dwarf_getsrclines.c in libdw in elfutils 0.175. A crafted input can cause segmentation faults, leading to denial-of-service, as demonstrated by eu-nm.

References

low severity

CVE-2020-27618

  • 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:5.1@* glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/multiarch-support@2.27-3ubuntu1

Overview

Affected versions of this package are vulnerable to CVE-2020-27618 iconv when processing invalid multi-byte input sequences fails to advance the input state, which could result in an infinite loop

Remediation

There is no fixed version for 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:5.1@* glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/multiarch-support@2.27-3ubuntu1

Overview

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.

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:5.1@* glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/multiarch-support@2.27-3ubuntu1

Overview

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.

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/multiarch-support@2.27-3ubuntu1

Overview

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.

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/multiarch-support@2.27-3ubuntu1

Overview

In the GNU C Library (aka glibc or libc6) through 2.28, the getaddrinfo function would successfully parse a string that contained an IPv4 address followed by whitespace and arbitrary characters, which could lead applications to incorrectly assume that it had parsed a valid string, without the possibility of embedded HTTP headers or other potentially dangerous substrings.

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:5.1@* glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/multiarch-support@2.27-3ubuntu1

Overview

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.

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/multiarch-support@2.27-3ubuntu1

Overview

Affected versions of this package are vulnerable to Integer Underflow. 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

There is no fixed version for glibc.

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/multiarch-support@2.27-3ubuntu1

Overview

In the GNU C Library (aka glibc or libc6) through 2.29, the memcmp function for the x32 architecture can incorrectly return zero (indicating that the inputs are equal) because the RDX most significant bit is mishandled.

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:5.1@* glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/multiarch-support@2.27-3ubuntu1

Overview

Affected versions of this package are vulnerable to Out-of-Bounds. 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 glibc to version 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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/multiarch-support@2.27-3ubuntu1

Overview

Affected versions of this package are vulnerable to Out-of-bounds Read. 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

There is no fixed version for glibc.

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:5.1@* glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/multiarch-support@2.27-3ubuntu1

Overview

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.

References

low severity

Uncontrolled Recursion

  • 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:5.1@* glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/multiarch-support@2.27-3ubuntu1

Overview

In the GNU C Library (aka glibc or libc6) through 2.29, check_dst_limits_calc_pos_1 in posix/regexec.c has Uncontrolled Recursion, as demonstrated by '(\227|)(\1\1|t1|\\2537)+' in grep.

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:5.1@* glibc/libc-bin@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/libc6@2.27-3ubuntu1
  • Introduced through: concourse/concourse:5.1@* glibc/multiarch-support@2.27-3ubuntu1

Overview

Affected versions of this package are vulnerable to Use After Free. 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 glibc to version or higher.

References

low severity

Improper Validation of Certificate with Host Mismatch

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* gnupg2/gpgv@2.2.4-1ubuntu1.2

Overview

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.

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:5.1@* gnupg2/gpgv@2.2.4-1ubuntu1.2

Overview

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.

References

low severity

Information Exposure

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* gnutls28/libgnutls30@3.5.18-1ubuntu1

Overview

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.

References

low severity

Improper Input Validation

  • Vulnerable module: iptables/libxtables12
  • Introduced through: iptables/libxtables12@1.6.1-2ubuntu2

Detailed paths

  • Introduced through: concourse/concourse:5.1@* iptables/libxtables12@1.6.1-2ubuntu2

Overview

extensions/libxt_tcp.c in iptables through 1.4.21 does not match TCP SYN+FIN packets in --syn rules, which might allow remote attackers to bypass intended firewall restrictions via crafted packets. NOTE: the CVE-2012-6638 fix makes this issue less relevant.

References

low severity

Cryptographic Issues

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* libgcrypt20@1.8.1-4ubuntu1.1

Overview

** DISPUTED ** In Libgcrypt 1.8.4, the C implementation of AES is vulnerable to a flush-and-reload side-channel attack because physical addresses are available to other processes. (The C implementation is used on platforms where an assembly-language implementation is unavailable.) NOTE: the vendor's position is that the issue report cannot be validated because there is no description of an attack.

References

low severity

Resource Management Errors

  • Vulnerable module: libtasn1-6
  • Introduced through: libtasn1-6@4.13-2

Detailed paths

  • Introduced through: concourse/concourse:5.1@* libtasn1-6@4.13-2

Overview

GNU Libtasn1-4.13 libtasn1-4.13 version libtasn1-4.13, libtasn1-4.12 contains a DoS, specifically CPU usage will reach 100% when running asn1Paser against the POC due to an issue in _asn1_expand_object_id(p_tree), after a long time, the program will be killed. This attack appears to be exploitable via parsing a crafted file.

References

low severity

Buffer Overflow

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* lz4/liblz4-1@0.0~r131-2ubuntu3

Overview

LZ4 before 1.9.2 has a heap-based buffer overflow in LZ4_write32 (related to LZ4_compress_destSize), affecting applications that call LZ4_compress_fast with a large input. (This issue can also lead to data corruption.) NOTE: the vendor states "only a few specific / uncommon usages of the API are at risk."

References

low severity

Out-of-bounds Read

  • Vulnerable module: lzo2/liblzo2-2
  • Introduced through: lzo2/liblzo2-2@2.08-1.2

Detailed paths

  • Introduced through: concourse/concourse:5.1@* lzo2/liblzo2-2@2.08-1.2

Overview

The lzo1x_decompress function in lzo1x_d.ch in LZO 2.08, as used in lrzip 0.631, allows remote attackers to cause a denial of service (invalid memory read and application crash) via a crafted archive.

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* ncurses/libncurses5@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse:5.1@* ncurses/libncursesw5@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse:5.1@* ncurses/libtinfo5@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse:5.1@* ncurses/ncurses-base@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse:5.1@* ncurses/ncurses-bin@6.1-1ubuntu1.18.04

Overview

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.

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* ncurses/libncurses5@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse:5.1@* ncurses/libncursesw5@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse:5.1@* ncurses/libtinfo5@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse:5.1@* ncurses/ncurses-base@6.1-1ubuntu1.18.04
  • Introduced through: concourse/concourse:5.1@* ncurses/ncurses-bin@6.1-1ubuntu1.18.04

Overview

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.

References

low severity

Information Exposure

  • Vulnerable module: nettle/libhogweed4
  • Introduced through: nettle/libhogweed4@3.4-1 and nettle/libnettle6@3.4-1

Detailed paths

  • Introduced through: concourse/concourse:5.1@* nettle/libhogweed4@3.4-1
  • Introduced through: concourse/concourse:5.1@* nettle/libnettle6@3.4-1

Overview

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.

References

low severity

Cryptographic Issues

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.0g-2ubuntu4.3 and openssl/libssl1.1@1.1.0g-2ubuntu4.3
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.2

Detailed paths

  • Introduced through: concourse/concourse:5.1@* openssl@1.1.0g-2ubuntu4.3
  • Introduced through: concourse/concourse:5.1@* openssl/libssl1.1@1.1.0g-2ubuntu4.3

Overview

ChaCha20-Poly1305 is an AEAD cipher, and requires a unique nonce input for every encryption operation. RFC 7539 specifies that the nonce value (IV) should be 96 bits (12 bytes). OpenSSL allows a variable nonce length and front pads the nonce with 0 bytes if it is less than 12 bytes. However it also incorrectly allows a nonce to be set of up to 16 bytes. In this case only the last 12 bytes are significant and any additional leading bytes are ignored. It is a requirement of using this cipher that nonce values are unique. Messages encrypted using a reused nonce value are susceptible to serious confidentiality and integrity attacks. If an application changes the default nonce length to be longer than 12 bytes and then makes a change to the leading bytes of the nonce expecting the new value to be a new unique nonce then such an application could inadvertently encrypt messages with a reused nonce. Additionally the ignored bytes in a long nonce are not covered by the integrity guarantee of this cipher. Any application that relies on the integrity of these ignored leading bytes of a long nonce may be further affected. Any OpenSSL internal use of this cipher, including in SSL/TLS, is safe because no such use sets such a long nonce value. However user applications that use this cipher directly and set a non-default nonce length to be longer than 12 bytes may be vulnerable. OpenSSL versions 1.1.1 and 1.1.0 are affected by this issue. Due to the limited scope of affected deployments this has been assessed as low severity and therefore we are not creating new releases at this time. Fixed in OpenSSL 1.1.1c (Affected 1.1.1-1.1.1b). Fixed in OpenSSL 1.1.0k (Affected 1.1.0-1.1.0j).

References

low severity
new

CVE-2021-23840

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.0g-2ubuntu4.3 and openssl/libssl1.1@1.1.0g-2ubuntu4.3
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.8

Detailed paths

  • Introduced through: concourse/concourse:5.1@* openssl@1.1.0g-2ubuntu4.3
  • Introduced through: concourse/concourse:5.1@* openssl/libssl1.1@1.1.0g-2ubuntu4.3

Overview

Affected versions of this package are vulnerable to CVE-2021-23840. 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 openssl to version or higher.

References

low severity

Information Exposure

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.0g-2ubuntu4.3 and openssl/libssl1.1@1.1.0g-2ubuntu4.3
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.6

Detailed paths

  • Introduced through: concourse/concourse:5.1@* openssl@1.1.0g-2ubuntu4.3
  • Introduced through: concourse/concourse:5.1@* openssl/libssl1.1@1.1.0g-2ubuntu4.3

Overview

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).

References

low severity

Missing Encryption of Sensitive Data

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.0g-2ubuntu4.3 and openssl/libssl1.1@1.1.0g-2ubuntu4.3
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.6

Detailed paths

  • Introduced through: concourse/concourse:5.1@* openssl@1.1.0g-2ubuntu4.3
  • Introduced through: concourse/concourse:5.1@* openssl/libssl1.1@1.1.0g-2ubuntu4.3

Overview

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).

References

low severity

Missing Encryption of Sensitive Data

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.0g-2ubuntu4.3 and openssl/libssl1.1@1.1.0g-2ubuntu4.3
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.6

Detailed paths

  • Introduced through: concourse/concourse:5.1@* openssl@1.1.0g-2ubuntu4.3
  • Introduced through: concourse/concourse:5.1@* openssl/libssl1.1@1.1.0g-2ubuntu4.3

Overview

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).

References

low severity

Use of Insufficiently Random Values

  • Vulnerable module: openssl
  • Introduced through: openssl@1.1.0g-2ubuntu4.3 and openssl/libssl1.1@1.1.0g-2ubuntu4.3
  • Fixed in: 1.1.1-1ubuntu2.1~18.04.6

Detailed paths

  • Introduced through: concourse/concourse:5.1@* openssl@1.1.0g-2ubuntu4.3
  • Introduced through: concourse/concourse:5.1@* openssl/libssl1.1@1.1.0g-2ubuntu4.3

Overview

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).

References

low severity

Integer Overflow or Wraparound

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* pcre3/libpcre3@2:8.39-9

Overview

Affected versions of this package are vulnerable to Integer Overflow or Wraparound libpcre in PCRE before 8.44 allows an integer overflow via a large number after a (?C substring.

Remediation

There is no fixed version for pcre3.

References

low severity

Out-of-bounds Read

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* pcre3/libpcre3@2:8.39-9

Overview

Affected versions of this package are vulnerable to Out-of-bounds Read 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

There is no fixed version for pcre3.

References

low severity

Uncontrolled Recursion

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

Detailed paths

  • Introduced through: concourse/concourse:5.1@* pcre3/libpcre3@2:8.39-9

Overview

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.

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:5.1@* perl/perl-base@5.26.1-6ubuntu0.3

Overview

Affected versions of this package are vulnerable to Buffer Overflow regcomp.c in Perl before 5.30.3 allows a buffer overflow via a crafted regular expression because of recursive S_study_chunk calls. An application written in Perl would only be vulnerable to this flaw if it evaluates regular expressions supplied by the attacker. Evaluating regular expressions in this fashion is known to be dangerous since the regular expression engine does not protect against denial of service attacks in this usage scenario.]

Remediation

Upgrade perl to version 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:5.1@* perl/perl-base@5.26.1-6ubuntu0.3

Overview

Affected versions of this package are vulnerable to Integer Overflow or Wraparound. 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. An application written in Perl would only be vulnerable to this flaw if it evaluates regular expressions supplied by the attacker. Evaluating regular expressions in this fashion is known to be dangerous since the regular expression engine does not protect against denial of service attacks in this usage scenario.]

Remediation

Upgrade perl to version 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:5.1@* perl/perl-base@5.26.1-6ubuntu0.3

Overview

Affected versions of this package are vulnerable to Out-of-bounds Write. Perl before 5.30.3 on 32-bit platforms allows a heap-based buffer overflow because nested regular expression quantifiers have an integer overflow. An application written in Perl would only be vulnerable to this flaw if it evaluates regular expressions supplied by the attacker. Evaluating regular expressions in this fashion is known to be dangerous since the regular expression engine does not protect against denial of service attacks in this usage scenario. Additionally, the target system needs a sufficient amount of memory to allocate partial expansions of the nested quantifiers prior to the overflow occurring. This requirement is unlikely to be met on 64bit systems.]

Remediation

Upgrade perl to version or higher.

References

low severity

Incorrect Permission Assignment for Critical Resource

  • Vulnerable module: shadow/login
  • Introduced through: shadow/login@1:4.5-1ubuntu1 and shadow/passwd@1:4.5-1ubuntu1

Detailed paths

  • Introduced through: concourse/concourse:5.1@* shadow/login@1:4.5-1ubuntu1
  • Introduced through: concourse/concourse:5.1@* shadow/passwd@1:4.5-1ubuntu1

Overview

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.

References

low severity

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

  • Vulnerable module: shadow/login
  • Introduced through: shadow/login@1:4.5-1ubuntu1 and shadow/passwd@1:4.5-1ubuntu1

Detailed paths

  • Introduced through: concourse/concourse:5.1@* shadow/login@1:4.5-1ubuntu1
  • Introduced through: concourse/concourse:5.1@* shadow/passwd@1:4.5-1ubuntu1

Overview

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

References

low severity

Improper Input Validation

  • Vulnerable module: systemd/libsystemd0
  • Introduced through: systemd/libsystemd0@237-3ubuntu10.13 and systemd/libudev1@237-3ubuntu10.13

Detailed paths

  • Introduced through: concourse/concourse:5.1@* systemd/libsystemd0@237-3ubuntu10.13
  • Introduced through: concourse/concourse:5.1@* systemd/libudev1@237-3ubuntu10.13

Overview

Affected versions of this package are vulnerable to Improper Input Validation systemd through v245 mishandles numerical usernames such as ones composed of decimal digits or 0x followed by hex digits, as demonstrated by use of root privileges when privileges of the 0x0 user account were intended. NOTE: this issue exists because of an incomplete fix for CVE-2017-1000082.

Remediation

There is no fixed version for systemd.

References

low severity

Incorrect Privilege Assignment

  • Vulnerable module: systemd/libsystemd0
  • Introduced through: systemd/libsystemd0@237-3ubuntu10.13 and systemd/libudev1@237-3ubuntu10.13
  • Fixed in: 237-3ubuntu10.38

Detailed paths

  • Introduced through: concourse/concourse:5.1@* systemd/libsystemd0@237-3ubuntu10.13
  • Introduced through: concourse/concourse:5.1@* systemd/libudev1@237-3ubuntu10.13

Overview

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.

References

low severity

Missing Release of Resource after Effective Lifetime

  • Vulnerable module: systemd/libsystemd0
  • Introduced through: systemd/libsystemd0@237-3ubuntu10.13 and systemd/libudev1@237-3ubuntu10.13
  • Fixed in: 237-3ubuntu10.38

Detailed paths

  • Introduced through: concourse/concourse:5.1@* systemd/libsystemd0@237-3ubuntu10.13
  • Introduced through: concourse/concourse:5.1@* systemd/libudev1@237-3ubuntu10.13

Overview

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.

References

low severity

Privilege Chaining

  • Vulnerable module: systemd/libsystemd0
  • Introduced through: systemd/libsystemd0@237-3ubuntu10.13 and systemd/libudev1@237-3ubuntu10.13
  • Fixed in: 237-3ubuntu10.38

Detailed paths

  • Introduced through: concourse/concourse:5.1@* systemd/libsystemd0@237-3ubuntu10.13
  • Introduced through: concourse/concourse:5.1@* systemd/libudev1@237-3ubuntu10.13

Overview

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.

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:5.1@* tar@1.29b-2ubuntu0.1

Overview

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).

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:5.1@* tar@1.29b-2ubuntu0.1

Overview

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.

References

low severity

Access Restriction Bypass

  • Vulnerable module: util-linux
  • Introduced through: util-linux@2.31.1-0.4ubuntu3.3, util-linux/fdisk@2.31.1-0.4ubuntu3.3 and others
  • Fixed in: 2.31.1-0.4ubuntu3.7

Detailed paths

  • Introduced through: concourse/concourse:5.1@* util-linux@2.31.1-0.4ubuntu3.3
  • Introduced through: concourse/concourse:5.1@* util-linux/fdisk@2.31.1-0.4ubuntu3.3
  • Introduced through: concourse/concourse:5.1@* util-linux/libblkid1@2.31.1-0.4ubuntu3.3
  • Introduced through: concourse/concourse:5.1@* util-linux/libfdisk1@2.31.1-0.4ubuntu3.3
  • Introduced through: concourse/concourse:5.1@* util-linux/libmount1@2.31.1-0.4ubuntu3.3
  • Introduced through: concourse/concourse:5.1@* util-linux/libsmartcols1@2.31.1-0.4ubuntu3.3
  • Introduced through: concourse/concourse:5.1@* util-linux/libuuid1@2.31.1-0.4ubuntu3.3
  • Introduced through: concourse/concourse:5.1@* util-linux/mount@2.31.1-0.4ubuntu3.3

Overview

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.

References