CVE Vulnerability

CVE-2023-22742

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.

5.9 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://github.com/libgit2/libgit2/commit/42e5db98b963ae503229c63e44e06e439df50e56 Patch Third Party Advisory
https://github.com/libgit2/libgit2/releases/tag/v1.5.1 Release Notes Third Party Advisory
https://github.com/libgit2/libgit2/security/advisories/GHSA-8643-3wh5-rmjq Third Party Advisory
https://github.com/libgit2/libgit2/commit/cd6f679af401eda1f172402006ef8265f8bd58ea Patch Third Party Advisory
https://github.com/libgit2/libgit2/releases/tag/v1.4.5 Release Notes Third Party Advisory
https://www.libssh2.org Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:libgit2:libgit2:*:*:*:*:*:*:*:*
cpe:2.3:a:libgit2:libgit2:1.5.0:*:*:*:*:*:*:*
Information

Published : 2023-01-20 11:15

Updated : 2023-01-30 08:53

NVD link : CVE-2023-22742

Mitre link : CVE-2023-22742

Products Affected
No products.
CWE
CWE-347

Improper Verification of Cryptographic Signature