Incorrect Regular Expression in GitLab Enterprise Edition and Gitlab Community Edition - CVE-2023-3909
Published: November 1, 2023
Vulnerability identifier: #VU82622
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-3909
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 timeout input validation when processing regular expressions in gitlab-ci.yml file. A remote user can pass specially crafted data to the application and perform regular expression denial of service (ReDos) attack.
Affected software
GitLab Enterprise Edition
Gitlab Community Edition
Gitlab Community Edition
How to mitigate CVE-2023-3909
Install updates from vendor's website.
GitLab Enterprise Edition - addressed in versions 16.3.6, 16.4.2, 16.5.1
Gitlab Community Edition - addressed in versions 16.3.6, 16.4.2, 16.5.1
Gitlab Community Edition - addressed in versions 16.3.6, 16.4.2, 16.5.1