Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Libgit2 | Libgit2 | < 1.4.5 |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2023/11/06/5
- https://github.com/libgit2/libgit2/commit/42e5db98b963ae503229c63e44e06e439df50ePatchThird Party Advisory
- https://github.com/libgit2/libgit2/commit/cd6f679af401eda1f172402006ef8265f8bd58PatchThird Party Advisory
- https://github.com/libgit2/libgit2/releases/tag/v1.4.5Release NotesThird Party Advisory
- https://github.com/libgit2/libgit2/releases/tag/v1.5.1Release NotesThird Party Advisory
- https://github.com/libgit2/libgit2/security/advisories/GHSA-8643-3wh5-rmjqThird Party Advisory
- https://www.libssh2.orgThird Party Advisory
- http://www.openwall.com/lists/oss-security/2023/11/06/5
- https://github.com/libgit2/libgit2/commit/42e5db98b963ae503229c63e44e06e439df50ePatchThird Party Advisory
- https://github.com/libgit2/libgit2/commit/cd6f679af401eda1f172402006ef8265f8bd58PatchThird Party Advisory
- https://github.com/libgit2/libgit2/releases/tag/v1.4.5Release NotesThird Party Advisory
- https://github.com/libgit2/libgit2/releases/tag/v1.5.1Release NotesThird Party Advisory
- https://github.com/libgit2/libgit2/security/advisories/GHSA-8643-3wh5-rmjqThird Party Advisory
- https://www.libssh2.orgThird Party Advisory
FAQ
What is CVE-2023-22742?
CVE-2023-22742 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 version...
How severe is CVE-2023-22742?
CVE-2023-22742 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-22742?
Check the references section above for vendor advisories and patch information. Affected products include: Libgit2 Libgit2.