The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 23.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6678-1 advisory.

  - An issue was discovered in libgit2 before 0.28.4 and 0.9x before 0.99.0. path.c mishandles equivalent     filenames that exist because of NTFS Alternate Data Streams. This may allow remote code execution when     cloning a repository. This issue is similar to CVE-2019-1352. (CVE-2020-12278)

  - An issue was discovered in libgit2 before 0.28.4 and 0.9x before 0.99.0. checkout.c mishandles equivalent     filenames that exist because of NTFS short names. This may allow remote code execution when cloning a     repository. This issue is similar to CVE-2019-1353. (CVE-2020-12279)

  - libgit2 is a cross-platform, linkable library implementation of Git. When using an SSH remote with the     optional libssh2 backend, libgit2 does not perform certificate checking by default. Prior versions of     libgit2 require the caller to set the `certificate_check` field of libgit2's `git_remote_callbacks`     structure - if a certificate check callback is not set, libgit2 does not perform any certificate checking.
    This means that by default - without configuring a certificate check callback, clients will not perform     validation on the server SSH keys and may be subject to a man-in-the-middle attack. Users are encouraged     to upgrade to v1.4.5 or v1.5.1. Users unable to upgrade should ensure that all relevant certificates are     manually checked. (CVE-2023-22742)

  - libgit2 is a portable C implementation of the Git core methods provided as a linkable library with a solid     API, allowing to build Git functionality into your application. Using well-crafted inputs to     `git_revparse_single` can cause the function to enter an infinite loop, potentially causing a Denial of     Service attack in the calling application. The revparse function in `src/libgit2/revparse.c` uses a loop     to parse the user-provided spec string. There is an edge-case during parsing that allows a bad actor to     force the loop conditions to access arbitrary memory. Potentially, this could also leak memory if the     extracted rev spec is reflected back to the attacker. As such, libgit2 versions before 1.4.0 are not     affected. Users should upgrade to version 1.6.5 or 1.7.2. (CVE-2024-24575)

  - libgit2 is a portable C implementation of the Git core methods provided as a linkable library with a solid     API, allowing to build Git functionality into your application. Using well-crafted inputs to     `git_index_add` can cause heap corruption that could be leveraged for arbitrary code execution. There is     an issue in the `has_dir_name` function in `src/libgit2/index.c`, which frees an entry that should not be     freed. The freed entry is later used and overwritten with potentially bad actor-controlled data leading to     controlled heap corruption. Depending on the application that uses libgit2, this could lead to arbitrary     code execution. This issue has been patched in version 1.6.5 and 1.7.2. (CVE-2024-24577)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

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Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 23.10 : libgit2 vulnerabilities (USN-6678-1)

critical Nessus Plugin ID 191559

Version 1.1

Version 1.0

Version 1.1 Mar 6, 2024, 7:09 PM CVE (set "CVE" coverage to "CVE-2020-12278,CVE-2020-12279,CVE-2023-22742,CVE-2024-24575,CVE-2024-24577") CVSS metrics ("CVSSv2 score" set to 7.5. "CVSSv2 vector" set to "CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P". "CVSSv3 score" set to 9.8. "CVSSv3 vector" set to "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H") CVSS temporal metrics ("CVSSv2 temporal vector" set to "CVSS2#E:U/RL:OF/RC:C". "CVSSv3 temporal vector" set to "CVSS:3.0/E:U/RL:O/RC:C") CVSSv2 score source (set to "CVE-2020-12279") CVSSv3 score source (set to "CVE-2024-24577") Plugin metadata Plugin Feed: 202403061909
Version 1.0 Mar 6, 2024, 1:05 AM New Plugin Feed: 202403060105