Vulnerabilities

 37 via 72 paths

Dependencies

 90

Source

 Group 6 Copy Created with Sketch. Docker

Target OS

 ubuntu:18.04
Test your Docker Hub image against our market leading vulnerability database Sign up for free
Severity
  • 1
  • 19
  • 17
Status
  • 37
  • 0
  • 0

high severity
new

Out-of-bounds Write

  • Vulnerable module: gnupg2/gpgv
  • Introduced through: gnupg2/gpgv@2.2.4-1ubuntu1.6
  • Fixed in: 2.2.4-1ubuntu1.6+esm2

Detailed paths

  • Introduced through: ubuntu@bionic › gnupg2/gpgv@2.2.4-1ubuntu1.6

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.

In GnuPG before 2.4.9, armor_filter in g10/armor.c has two increments of an index variable where one is intended, leading to an out-of-bounds write for crafted input. (For ExtendedLTS, 2.2.51 and later are fixed versions.)

Remediation

Upgrade Ubuntu:18.04 gnupg2 to version 2.2.4-1ubuntu1.6+esm2 or higher.

References

Out-of-bounds Write vulnerability report

medium severity

Double Free

  • Vulnerable module: gnutls28/libgnutls30
  • Introduced through: gnutls28/libgnutls30@3.5.18-1ubuntu1.6
  • Fixed in: 3.5.18-1ubuntu1.6+esm2

Detailed paths

  • Introduced through: ubuntu@bionic › gnutls28/libgnutls30@3.5.18-1ubuntu1.6

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 flaw was found in GnuTLS. A double-free vulnerability exists in GnuTLS due to incorrect ownership handling in the export logic of Subject Alternative Name (SAN) entries containing an otherName. If the type-id OID is invalid or malformed, GnuTLS will call asn1_delete_structure() on an ASN.1 node it does not own, leading to a double-free condition when the parent function or caller later attempts to free the same structure.

This vulnerability can be triggered using only public GnuTLS APIs and may result in denial of service or memory corruption, depending on allocator behavior.

Remediation

Upgrade Ubuntu:18.04 gnutls28 to version 3.5.18-1ubuntu1.6+esm2 or higher.

References

Double Free vulnerability report

medium severity

Heap-based Buffer Overflow

  • Vulnerable module: gnutls28/libgnutls30
  • Introduced through: gnutls28/libgnutls30@3.5.18-1ubuntu1.6
  • Fixed in: 3.5.18-1ubuntu1.6+esm2

Detailed paths

  • Introduced through: ubuntu@bionic › gnutls28/libgnutls30@3.5.18-1ubuntu1.6

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 heap-buffer-overflow (off-by-one) flaw was found in the GnuTLS software in the template parsing logic within the certtool utility. When it reads certain settings from a template file, it allows an attacker to cause an out-of-bounds (OOB) NULL pointer write, resulting in memory corruption and a denial-of-service (DoS) that could potentially crash the system.

Remediation

Upgrade Ubuntu:18.04 gnutls28 to version 3.5.18-1ubuntu1.6+esm2 or higher.

References

Heap-based Buffer Overflow vulnerability report

medium severity

Directory Traversal

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

Detailed paths

  • Introduced through: ubuntu@bionic › pam/libpam-modules@1.1.8-3.6ubuntu2.18.04.6
  • Introduced through: ubuntu@bionic › pam/libpam-modules-bin@1.1.8-3.6ubuntu2.18.04.6
  • Introduced through: ubuntu@bionic › pam/libpam-runtime@1.1.8-3.6ubuntu2.18.04.6
  • Introduced through: ubuntu@bionic › pam/libpam0g@1.1.8-3.6ubuntu2.18.04.6

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.

A flaw was found in linux-pam. The pam_namespace module may improperly handle user-controlled paths, allowing local users to exploit symlink attacks and race conditions to elevate their privileges to root. This CVE provides a "complete" fix for CVE-2025-6020.

Remediation

There is no fixed version for Ubuntu:18.04 pam.

References

Directory Traversal vulnerability report

medium severity

Out-of-bounds Write

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

Detailed paths

  • Introduced through: ubuntu@bionic › ncurses/libncurses5@6.1-1ubuntu1.18.04.1
  • Introduced through: ubuntu@bionic › ncurses/libncursesw5@6.1-1ubuntu1.18.04.1
  • Introduced through: ubuntu@bionic › ncurses/libtinfo5@6.1-1ubuntu1.18.04.1
  • Introduced through: ubuntu@bionic › ncurses/ncurses-base@6.1-1ubuntu1.18.04.1
  • Introduced through: ubuntu@bionic › ncurses/ncurses-bin@6.1-1ubuntu1.18.04.1

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

Out-of-bounds Write vulnerability report

medium severity

Information Exposure

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

Detailed paths

  • Introduced through: ubuntu@bionic › gnutls28/libgnutls30@3.5.18-1ubuntu1.6

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

Information Exposure vulnerability report

medium severity

Information Exposure

  • Vulnerable module: gcc-8/gcc-8-base
  • Introduced through: gcc-8/gcc-8-base@8.4.0-1ubuntu1~18.04, gcc-8/libgcc1@1:8.4.0-1ubuntu1~18.04 and others

Detailed paths

  • Introduced through: ubuntu@bionic › gcc-8/gcc-8-base@8.4.0-1ubuntu1~18.04
  • Introduced through: ubuntu@bionic › gcc-8/libgcc1@1:8.4.0-1ubuntu1~18.04
  • Introduced through: ubuntu@bionic › gcc-8/libstdc++6@8.4.0-1ubuntu1~18.04

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

Information Exposure vulnerability report

medium severity

CVE-2024-22365

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

Detailed paths

  • Introduced through: ubuntu@bionic › pam/libpam-modules@1.1.8-3.6ubuntu2.18.04.6
  • Introduced through: ubuntu@bionic › pam/libpam-modules-bin@1.1.8-3.6ubuntu2.18.04.6
  • Introduced through: ubuntu@bionic › pam/libpam-runtime@1.1.8-3.6ubuntu2.18.04.6
  • Introduced through: ubuntu@bionic › pam/libpam0g@1.1.8-3.6ubuntu2.18.04.6

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

CVE-2024-22365 vulnerability report

medium severity

CVE-2025-30258

  • Vulnerable module: gnupg2/gpgv
  • Introduced through: gnupg2/gpgv@2.2.4-1ubuntu1.6
  • Fixed in: 2.2.4-1ubuntu1.6+esm1

Detailed paths

  • Introduced through: ubuntu@bionic › gnupg2/gpgv@2.2.4-1ubuntu1.6

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.

In GnuPG before 2.5.5, if a user chooses to import a certificate with certain crafted subkey data that lacks a valid backsig or that has incorrect usage flags, the user loses the ability to verify signatures made from certain other signing keys, aka a "verification DoS."

Remediation

Upgrade Ubuntu:18.04 gnupg2 to version 2.2.4-1ubuntu1.6+esm1 or higher.

References

CVE-2025-30258 vulnerability report

medium severity
new

Improper Verification of Cryptographic Signature

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

Detailed paths

  • Introduced through: ubuntu@bionic › gnupg2/gpgv@2.2.4-1ubuntu1.6

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.

In GnuPG through 2.4.8, if a signed message has \f at the end of a plaintext line, an adversary can construct a modified message that places additional text after the signed material, such that signature verification of the modified message succeeds (although an "invalid armor" message is printed during verification). This is related to use of \f as a marker to denote truncation of a long plaintext line.

Remediation

There is no fixed version for Ubuntu:18.04 gnupg2.

References

Improper Verification of Cryptographic Signature vulnerability report

medium severity

CVE-2024-2961

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1.6 and glibc/libc6@2.27-3ubuntu1.6
  • Fixed in: 2.27-3ubuntu1.6+esm2

Detailed paths

  • Introduced through: ubuntu@bionic › glibc/libc-bin@2.27-3ubuntu1.6
  • Introduced through: ubuntu@bionic › glibc/libc6@2.27-3ubuntu1.6

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 versions 2.39 and older may overflow the output buffer passed to it by up to 4 bytes when converting strings to the ISO-2022-CN-EXT character set, which may be used to crash an application or overwrite a neighbouring variable.

Remediation

Upgrade Ubuntu:18.04 glibc to version 2.27-3ubuntu1.6+esm2 or higher.

References

CVE-2024-2961 vulnerability report

medium severity

CVE-2024-33599

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1.6 and glibc/libc6@2.27-3ubuntu1.6
  • Fixed in: 2.27-3ubuntu1.6+esm3

Detailed paths

  • Introduced through: ubuntu@bionic › glibc/libc-bin@2.27-3ubuntu1.6
  • Introduced through: ubuntu@bionic › glibc/libc6@2.27-3ubuntu1.6

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.

nscd: Stack-based buffer overflow in netgroup cache

If the Name Service Cache Daemon's (nscd) fixed size cache is exhausted by client requests then a subsequent client request for netgroup data may result in a stack-based buffer overflow. This flaw was introduced in glibc 2.15 when the cache was added to nscd.

This vulnerability is only present in the nscd binary.

Remediation

Upgrade Ubuntu:18.04 glibc to version 2.27-3ubuntu1.6+esm3 or higher.

References

CVE-2024-33599 vulnerability report

medium severity

CVE-2024-33600

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1.6 and glibc/libc6@2.27-3ubuntu1.6
  • Fixed in: 2.27-3ubuntu1.6+esm3

Detailed paths

  • Introduced through: ubuntu@bionic › glibc/libc-bin@2.27-3ubuntu1.6
  • Introduced through: ubuntu@bionic › glibc/libc6@2.27-3ubuntu1.6

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.

nscd: Null pointer crashes after notfound response

If the Name Service Cache Daemon's (nscd) cache fails to add a not-found netgroup response to the cache, the client request can result in a null pointer dereference. This flaw was introduced in glibc 2.15 when the cache was added to nscd.

This vulnerability is only present in the nscd binary.

Remediation

Upgrade Ubuntu:18.04 glibc to version 2.27-3ubuntu1.6+esm3 or higher.

References

CVE-2024-33600 vulnerability report

medium severity

CVE-2024-33601

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1.6 and glibc/libc6@2.27-3ubuntu1.6
  • Fixed in: 2.27-3ubuntu1.6+esm3

Detailed paths

  • Introduced through: ubuntu@bionic › glibc/libc-bin@2.27-3ubuntu1.6
  • Introduced through: ubuntu@bionic › glibc/libc6@2.27-3ubuntu1.6

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.

nscd: netgroup cache may terminate daemon on memory allocation failure

The Name Service Cache Daemon's (nscd) netgroup cache uses xmalloc or xrealloc and these functions may terminate the process due to a memory allocation failure resulting in a denial of service to the clients. The flaw was introduced in glibc 2.15 when the cache was added to nscd.

This vulnerability is only present in the nscd binary.

Remediation

Upgrade Ubuntu:18.04 glibc to version 2.27-3ubuntu1.6+esm3 or higher.

References

CVE-2024-33601 vulnerability report

medium severity

CVE-2024-33602

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1.6 and glibc/libc6@2.27-3ubuntu1.6
  • Fixed in: 2.27-3ubuntu1.6+esm3

Detailed paths

  • Introduced through: ubuntu@bionic › glibc/libc-bin@2.27-3ubuntu1.6
  • Introduced through: ubuntu@bionic › glibc/libc6@2.27-3ubuntu1.6

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.

nscd: netgroup cache assumes NSS callback uses in-buffer strings

The Name Service Cache Daemon's (nscd) netgroup cache can corrupt memory when the NSS callback does not store all strings in the provided buffer. The flaw was introduced in glibc 2.15 when the cache was added to nscd.

This vulnerability is only present in the nscd binary.

Remediation

Upgrade Ubuntu:18.04 glibc to version 2.27-3ubuntu1.6+esm3 or higher.

References

CVE-2024-33602 vulnerability report

medium severity

CVE-2025-0395

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1.6 and glibc/libc6@2.27-3ubuntu1.6
  • Fixed in: 2.27-3ubuntu1.6+esm4

Detailed paths

  • Introduced through: ubuntu@bionic › glibc/libc-bin@2.27-3ubuntu1.6
  • Introduced through: ubuntu@bionic › glibc/libc6@2.27-3ubuntu1.6

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.

When the assert() function in the GNU C Library versions 2.13 to 2.40 fails, it does not allocate enough space for the assertion failure message string and size information, which may lead to a buffer overflow if the message string size aligns to page size.

Remediation

Upgrade Ubuntu:18.04 glibc to version 2.27-3ubuntu1.6+esm4 or higher.

References

CVE-2025-0395 vulnerability report

medium severity

CVE-2025-4802

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1.6 and glibc/libc6@2.27-3ubuntu1.6
  • Fixed in: 2.27-3ubuntu1.6+esm5

Detailed paths

  • Introduced through: ubuntu@bionic › glibc/libc-bin@2.27-3ubuntu1.6
  • Introduced through: ubuntu@bionic › glibc/libc6@2.27-3ubuntu1.6

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.

Untrusted LD_LIBRARY_PATH environment variable vulnerability in the GNU C Library version 2.27 to 2.38 allows attacker controlled loading of dynamically shared library in statically compiled setuid binaries that call dlopen (including internal dlopen calls after setlocale or calls to NSS functions such as getaddrinfo).

Remediation

Upgrade Ubuntu:18.04 glibc to version 2.27-3ubuntu1.6+esm5 or higher.

References

CVE-2025-4802 vulnerability report

medium severity

CVE-2025-8058

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1.6 and glibc/libc6@2.27-3ubuntu1.6

Detailed paths

  • Introduced through: ubuntu@bionic › glibc/libc-bin@2.27-3ubuntu1.6
  • Introduced through: ubuntu@bionic › glibc/libc6@2.27-3ubuntu1.6

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 regcomp function in the GNU C library version from 2.4 to 2.41 is subject to a double free if some previous allocation fails. It can be accomplished either by a malloc failure or by using an interposed malloc that injects random malloc failures. The double free can allow buffer manipulation depending of how the regex is constructed. This issue affects all architectures and ABIs supported by the GNU C library.

Remediation

There is no fixed version for Ubuntu:18.04 glibc.

References

CVE-2025-8058 vulnerability report

medium severity

CVE-2023-39804

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

Detailed paths

  • Introduced through: ubuntu@bionic › tar@1.29b-2ubuntu0.4

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

CVE-2023-39804 vulnerability report

medium severity

Directory Traversal

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

Detailed paths

  • Introduced through: ubuntu@bionic › tar@1.29b-2ubuntu0.4

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 1.35 allows file overwrite via directory traversal in crafted TAR archives, with a certain two-step process. First, the victim must extract an archive that contains a ../ symlink to a critical directory. Second, the victim must extract an archive that contains a critical file, specified via a relative pathname that begins with the symlink name and ends with that critical file's name. Here, the extraction follows the symlink and overwrites the critical file. This bypasses the protection mechanism of "Member name contains '..'" that would occur for a single TAR archive that attempted to specify the critical file via a ../ approach. For example, the first archive can contain "x -> ../../../../../home/victim/.ssh" and the second archive can contain x/authorized_keys. This can affect server applications that automatically extract any number of user-supplied TAR archives, and were relying on the blocking of traversal. This can also affect software installation processes in which "tar xf" is run more than once (e.g., when installing a package can automatically install two dependencies that are set up as untrusted tarballs instead of official packages). NOTE: the official GNU Tar manual has an otherwise-empty directory for each "tar xf" in its Security Rules of Thumb; however, third-party advice leads users to run "tar xf" more than once into the same directory.

Remediation

There is no fixed version for Ubuntu:18.04 tar.

References

Directory Traversal vulnerability report

low severity

Use After Free

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1.6 and glibc/libc6@2.27-3ubuntu1.6

Detailed paths

  • Introduced through: ubuntu@bionic › glibc/libc-bin@2.27-3ubuntu1.6
  • Introduced through: ubuntu@bionic › glibc/libc6@2.27-3ubuntu1.6

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

Use After Free vulnerability report

low severity

CVE-2023-26604

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

Detailed paths

  • Introduced through: ubuntu@bionic › systemd/libsystemd0@237-3ubuntu10.57
  • Introduced through: ubuntu@bionic › systemd/libudev1@237-3ubuntu10.57

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

CVE-2023-26604 vulnerability report

low severity

Improper Data Handling

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1.6 and glibc/libc6@2.27-3ubuntu1.6

Detailed paths

  • Introduced through: ubuntu@bionic › glibc/libc-bin@2.27-3ubuntu1.6
  • Introduced through: ubuntu@bionic › glibc/libc6@2.27-3ubuntu1.6

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

Improper Data Handling vulnerability report

low severity

Uncontrolled Recursion

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

Detailed paths

  • Introduced through: ubuntu@bionic › pcre3/libpcre3@2:8.39-9ubuntu0.1

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

Uncontrolled Recursion vulnerability report

low severity

Improper Input Validation

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

Detailed paths

  • Introduced through: ubuntu@bionic › 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

Improper Input Validation vulnerability report

low severity

CVE-2023-50495

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

Detailed paths

  • Introduced through: ubuntu@bionic › ncurses/libncurses5@6.1-1ubuntu1.18.04.1
  • Introduced through: ubuntu@bionic › ncurses/libncursesw5@6.1-1ubuntu1.18.04.1
  • Introduced through: ubuntu@bionic › ncurses/libtinfo5@6.1-1ubuntu1.18.04.1
  • Introduced through: ubuntu@bionic › ncurses/ncurses-base@6.1-1ubuntu1.18.04.1
  • Introduced through: ubuntu@bionic › ncurses/ncurses-bin@6.1-1ubuntu1.18.04.1

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

CVE-2023-50495 vulnerability report

low severity

Improper Data Handling

  • Vulnerable module: glibc/libc-bin
  • Introduced through: glibc/libc-bin@2.27-3ubuntu1.6 and glibc/libc6@2.27-3ubuntu1.6

Detailed paths

  • Introduced through: ubuntu@bionic › glibc/libc-bin@2.27-3ubuntu1.6
  • Introduced through: ubuntu@bionic › glibc/libc6@2.27-3ubuntu1.6

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

Improper Data Handling vulnerability report

low severity

Use After Free

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

Detailed paths

  • Introduced through: ubuntu@bionic › glibc/libc-bin@2.27-3ubuntu1.6
  • Introduced through: ubuntu@bionic › glibc/libc6@2.27-3ubuntu1.6

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 has been identified 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

Use After Free vulnerability report

low severity

Use After Free

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

Detailed paths

  • Introduced through: ubuntu@bionic › glibc/libc-bin@2.27-3ubuntu1.6
  • Introduced through: ubuntu@bionic › glibc/libc6@2.27-3ubuntu1.6

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 has been identified 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

Use After Free vulnerability report

low severity

Information Exposure

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

Detailed paths

  • Introduced through: ubuntu@bionic › gnutls28/libgnutls30@3.5.18-1ubuntu1.6

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

Information Exposure vulnerability report

low severity

Improper Authentication

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

Detailed paths

  • Introduced through: ubuntu@bionic › shadow/login@1:4.5-1ubuntu2.5
  • Introduced through: ubuntu@bionic › shadow/passwd@1:4.5-1ubuntu2.5

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

Improper Authentication vulnerability report

low severity

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

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

Detailed paths

  • Introduced through: ubuntu@bionic › shadow/login@1:4.5-1ubuntu2.5
  • Introduced through: ubuntu@bionic › shadow/passwd@1:4.5-1ubuntu2.5

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

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

low severity

Out-of-bounds Write

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

Detailed paths

  • Introduced through: ubuntu@bionic › gnupg2/gpgv@2.2.4-1ubuntu1.6

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

Out-of-bounds Write vulnerability report

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: ubuntu@bionic › procps@2:3.3.12-3ubuntu1.2
  • Introduced through: ubuntu@bionic › 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

Out-of-bounds Write vulnerability report

low severity

Arbitrary Code Injection

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

Detailed paths

  • Introduced through: ubuntu@bionic › shadow/login@1:4.5-1ubuntu2.5
  • Introduced through: ubuntu@bionic › shadow/passwd@1:4.5-1ubuntu2.5

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

Arbitrary Code Injection vulnerability report

low severity

Information Exposure

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

Detailed paths

  • Introduced through: ubuntu@bionic › libgcrypt20@1.8.1-4ubuntu1.3

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

Information Exposure vulnerability report

low severity

CVE-2024-56433

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

Detailed paths

  • Introduced through: ubuntu@bionic › shadow/login@1:4.5-1ubuntu2.5
  • Introduced through: ubuntu@bionic › shadow/passwd@1:4.5-1ubuntu2.5

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-utils (aka shadow) 4.4 through 4.17.0 establishes a default /etc/subuid behavior (e.g., uid 100000 through 165535 for the first user account) that can realistically conflict with the uids of users defined on locally administered networks, potentially leading to account takeover, e.g., by leveraging newuidmap for access to an NFS home directory (or same-host resources in the case of remote logins by these local network users). NOTE: it may also be argued that system administrators should not have assigned uids, within local networks, that are within the range that can occur in /etc/subuid.

Remediation

There is no fixed version for Ubuntu:18.04 shadow.

References

CVE-2024-56433 vulnerability report