Vulnerability in GitLab
CVE-2023-3909
An issue has been discovered in GitLab CE/EE affecting all versions starting from 12.3 before 16.3.6, all versions starting from 16.4 before 16.4.2, all versions starting from 16.5 before 16.5.1. A Regular Expression Denial of Service was possible by adding a large string in timeout input in gitlab-ci.yml file.
Vulnerability class: ReDoS (Regular Expression Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.006 (46.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 46.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.000
Affected products
- GitLab — versions 16.4, 16.5.0, 16.5
Weakness classification (CWE)
References
- gitlab.com/gitlab-org/gitlab/-/issues/418763 (issue-tracking, permissions-required, Broken Link)
- hackerone.com/reports/2050269 (Permissions Required, technical-description, permissions-required, exploit)
Frequently asked questions
- What is CVE-2023-3909?
- CVE-2023-3909 is a medium-severity vulnerability in GitLab, classified under Inefficient Regular Expression Complexity. CVSS score: 4.3/10. Published 2023-11-06.
- How severe is CVE-2023-3909?
- Medium severity. CVSS v3 base score is 4.3 out of 10.