HOMEVULNERABILITIESCVE-2023-22742
MEDIUM

CVE-2023-22742

CWE-347Published: January 20, 2023· Updated: Jun 17, 2026

5.9
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2023-22742 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 5.9.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected Vendors & Products

libgit21 product(s)
libgit2
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/libgit2/libgit2/commit/42e5db98b963ae503229c63e44e06e439df50e56
PATCHhttps://github.com/libgit2/libgit2/commit/cd6f679af401eda1f172402006ef8265f8bd58ea
PATCHhttps://github.com/libgit2/libgit2/commit/42e5db98b963ae503229c63e44e06e439df50e56
PATCHhttps://github.com/libgit2/libgit2/commit/cd6f679af401eda1f172402006ef8265f8bd58ea
ADVISORYhttps://github.com/libgit2/libgit2/releases/tag/v1.4.5
ADVISORYhttps://github.com/libgit2/libgit2/releases/tag/v1.5.1
ADVISORYhttps://github.com/libgit2/libgit2/security/advisories/GHSA-8643-3wh5-rmjq
ADVISORYhttps://www.libssh2.org
ADVISORYhttps://github.com/libgit2/libgit2/releases/tag/v1.4.5
ADVISORYhttps://github.com/libgit2/libgit2/releases/tag/v1.5.1
ADVISORYhttps://github.com/libgit2/libgit2/security/advisories/GHSA-8643-3wh5-rmjq
ADVISORYhttps://www.libssh2.org

All References (14)

→
http://www.openwall.com/lists/oss-security/2023/11/06/5
→
https://github.com/libgit2/libgit2/commit/42e5db98b963ae503229c63e44e06e439df50e56Patch · Third Party Advisory
→
https://github.com/libgit2/libgit2/commit/cd6f679af401eda1f172402006ef8265f8bd58eaPatch · Third Party Advisory
→
https://github.com/libgit2/libgit2/releases/tag/v1.4.5Release Notes · Third Party Advisory
→
https://github.com/libgit2/libgit2/releases/tag/v1.5.1Release Notes · Third 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/42e5db98b963ae503229c63e44e06e439df50e56Patch · Third Party Advisory
→
https://github.com/libgit2/libgit2/commit/cd6f679af401eda1f172402006ef8265f8bd58eaPatch · Third Party Advisory
→
https://github.com/libgit2/libgit2/releases/tag/v1.4.5Release Notes · Third Party Advisory
→
https://github.com/libgit2/libgit2/releases/tag/v1.5.1Release Notes · Third Party Advisory
→
https://github.com/libgit2/libgit2/security/advisories/GHSA-8643-3wh5-rmjqThird Party Advisory
→
https://www.libssh2.orgThird Party Advisory

Quick Facts

CVE IDCVE-2023-22742
CVSS Score5.9 / 10
SeverityMEDIUM
WeaknessCWE-347
CISA KEVNo
Affected1 vendor(s)
PublishedJan 20, 2023

Related CVEs (CWE-347)

CVE-2024-32962
10.0
CVE-2026-48558
KEV10.0
CVE-2026-56451
10.0
CVE-2026-44748
9.9
CVE-2021-37927
9.8
CVE-2021-37160
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2023-22742 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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