5.9

CVE-2023-22742: libgit2

CVSS: 5.9v3.1MediumModified
AliasesSUSE-SU-2023:1788-1SUSE-SU-2023:1909-1UBUNTU-CVE-2023-22742
Published 20-01-2023Last modified 10-03-2025
Open JSON

Vulnerability summary

CVE-2023-22742 is a medium (CVSS 5.9) vulnerability in libgit2. EPSS estimates a 0.58% chance of exploitation in the next 30 days, higher than 46.6% of scored vulnerabilities.

Overall risk
24/100
0100
Low · default modelHow is this calculated?
CVSS score
5.9/10
010
Medium · v3.1 (NVD)
EPSS score
0.58%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3 · Related 3
DLA-3340-1MGASA-2024-0059USN-6678-1CGA-M65J-66MR-3GJ7CGA-V4R3-9CQ4-P6CH

Timeline

  1. 20-01-2023
    PublishedVulnerability first disclosed.
  2. 10-03-2025
    Last modifiedVulnerability information updated.

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 metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.58%

Chance of exploitation in the next 30 days

Percentile

47%

Versus all other CVEs

30-day change

0.00 pp

From 0.58% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.58%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Suse4 products
  • libgit2&distro=SUSE Linux Enterprise Module for Development Tools 15 SP4< 1.3.0-150400.3.6.1
  • libgit2&distro=SUSE Linux Enterprise Real Time 15 SP3< 0.28.4-150200.3.6.1
  • libgit2&distro=SUSE Manager Server Module 4.2< 0.28.4-150200.3.6.1
  • libgit2&distro=SUSE Manager Server Module 4.3< 0.28.4-150200.3.6.1
Crates.Io2 products
  • git2< 0.16.1
  • libgit2-sys≥ 0.14.0, < 0.14.2 | < 0.13.5
Opensuse2 products
  • libgit2&distro=openSUSE Leap 15.4< 0.26.8-150000.3.18.1 | < 1.3.0-150400.3.6.1 | < 0.28.4-150200.3.6.1
  • libgit2&distro=openSUSE Tumbleweed< 1.5.1-1.1
Chainguard1 product
  • libgit2-1.5< 1.7.2-r0
Debian1 product
  • libgit2< 1.5.1+ds-1
Libgit21 product
Ubuntu1 product
  • libgit2< 0.24.1-2ubuntu0.2+esm2 | < 0.26.0+dfsg.1-1.1ubuntu0.2+esm1 | < 0.28.4+dfsg.1-2ubuntu0.1 | < 1.1.0+dfsg.1-4.1ubuntu0.1

7 vendors · 12 products

References

23 links
Show all 23 references