CVE-2023-22742
What it is
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.
At a glance
- Exploitability
- Can be exploited over the network without logging in, but needs a user to act. High risk of data tampering.
- Exploit odds
- 0.6% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.6% in the next 30 days (EPSS).
- Severity: 5.3 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.6% · EPSS, next 30 days
- Weakness
- CWE-347
- Record status
- Modified
Affected
- libgit2 < 1.4.5
- libgit2 1.5.0
Attack profile CVSS 3.1 · 5.3
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Raw vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2023-22742.md and follow it. Check whether this project is affected by CVE-2023-22742. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://github.com/libgit2/libgit2/commit/42e5db98b963ae503229c63e44e06e439df50e56
- https://github.com/libgit2/libgit2/commit/cd6f679af401eda1f172402006ef8265f8bd58ea
- https://github.com/libgit2/libgit2/releases/tag/v1.4.5
- https://github.com/libgit2/libgit2/releases/tag/v1.5.1
- https://github.com/libgit2/libgit2/security/advisories/GHSA-8643-3wh5-rmjq
- https://github.com/libgit2/libgit2/commit/42e5db98b963ae503229c63e44e06e439df50e56
- https://github.com/libgit2/libgit2/commit/cd6f679af401eda1f172402006ef8265f8bd58ea
- https://github.com/libgit2/libgit2/releases/tag/v1.4.5
- https://github.com/libgit2/libgit2/releases/tag/v1.5.1
- https://github.com/libgit2/libgit2/security/advisories/GHSA-8643-3wh5-rmjq
References
- http://www.openwall.com/lists/oss-security/2023/11/06/5
- https://github.com/libgit2/libgit2/commit/42e5db98b963ae503229c63e44e06e439df50e56
- https://github.com/libgit2/libgit2/commit/cd6f679af401eda1f172402006ef8265f8bd58ea
- https://github.com/libgit2/libgit2/releases/tag/v1.4.5
- https://github.com/libgit2/libgit2/releases/tag/v1.5.1
- https://github.com/libgit2/libgit2/security/advisories/GHSA-8643-3wh5-rmjq
- https://www.libssh2.org
- http://www.openwall.com/lists/oss-security/2023/11/06/5
- https://github.com/libgit2/libgit2/commit/42e5db98b963ae503229c63e44e06e439df50e56
- https://github.com/libgit2/libgit2/commit/cd6f679af401eda1f172402006ef8265f8bd58ea
- https://github.com/libgit2/libgit2/releases/tag/v1.4.5
- https://github.com/libgit2/libgit2/releases/tag/v1.5.1
- https://github.com/libgit2/libgit2/security/advisories/GHSA-8643-3wh5-rmjq
- https://www.libssh2.org