Main Vulnerability Database Vulnerabilities #VU78859

Incorrect Regular Expression in Gitlab Community Edition and GitLab Enterprise Edition - CVE-2023-3994

Published: August 2, 2023

Vulnerability identifier: #VU78859

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2023-3994

CWE-ID: CWE-185

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient input validation when processing regular expressions within the ProjectReferenceFilter in any Markdown fields. A remote attacker can pass specially crafted data to the application and perform regular expression denial of service (ReDos) attack.

Affected software

Gitlab Community Edition
GitLab Enterprise Edition

How to mitigate CVE-2023-3994

Install updates from vendor's website.

Gitlab Community Edition - addressed in versions 16.0.8, 16.1.3, 16.2.2
GitLab Enterprise Edition - addressed in versions 16.0.8, 16.1.3, 16.2.2

External References

https://about.gitlab.com/releases/2023/08/01/security-release-gitlab-16-2-2-released/

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