Is CVE-2023-22742 in the CISA KEV catalog?

No. CVE-2023-22742 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-22742?

CVE-2023-22742 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2023-22742?

CVE-2023-22742 has an EPSS score of 0.58% (44th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-22742?

Upgrade libgit2 on debian 11 to 1.1.0+dfsg.1-4+deb11u1 or later. Fixes are available for 7 affected products.

CVE & CISA-KEV Catalog

CVE-2023-22742

MEDIUM

5.3

CVSS v3

NVD

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.

CWE-347

How to fix

Remediation Available

libgit2Debian

Fixed in:1.1.0+dfsg.1-4+deb11u1CVE-2023-22742

Fixed in:1.5.1+ds-1CVE-2023-22742

libgit2Ubuntu

Fixed in:0.24.1-2ubuntu0.2+esm2USN-6678-1

Fixed in:0.26.0+dfsg.1-1.1ubuntu0.2+esm1USN-6678-1

Fixed in:0.28.4+dfsg.1-2ubuntu0.1USN-6678-1

Fixed in:1.1.0+dfsg.1-4.1ubuntu0.1USN-6678-1

Fixed in:1.5.1+ds-1ubuntu1.1USN-6678-1

libgit2-1.1Ubuntu

Fixed in:1.1.0+dfsg.1-4.1ubuntu0.1USN-6678-1

libgit2-1.5Ubuntu

Fixed in:1.5.1+ds-1ubuntu1.1USN-6678-1

libgit2-24Ubuntu

Fixed in:0.24.1-2ubuntu0.2+esm2USN-6678-1

libgit2-26Ubuntu

Fixed in:0.26.0+dfsg.1-1.1ubuntu0.2+esm1USN-6678-1

libgit2-28Ubuntu

Fixed in:0.28.4+dfsg.1-2ubuntu0.1USN-6678-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

Exploit Intelligence

0.58%probability of exploitation in 30 days

44thpercentile

Moderate risk: more likely to be exploited than 44% of all known CVEs.

References

Patch2

Third-Party Advisory4

Other references1

openwall.com

Related Vulnerabilities

Other CWE-347 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2018-16042	Medium	6.5	82%	-	-
CVE-2025-59718	Critical	9.8	66%	KEV	Fix
CVE-2025-25292	Critical	9.8	64%	-	Fix
CVE-2021-22160	Critical	9.8	53%	-	Fix
CVE-2013-3900	Medium	5.5	45%	KEV	-
CVE-2018-0114	High	7.5	43%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.