Vulnerability · Published Jul 13, 2023 · Assigned by GitLab

CVE-2023-3424Inefficient Regular Expression Complexity in GitLab

High 7.5

In plain English

A high-severity regular-expression denial of service in GitLab from GitLab. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 60% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.9%top 40.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

An issue has been discovered in GitLab CE/EE affecting all versions starting from 10.3 before 15.11.10, all versions starting from 16.0 before 16.0.6, all versions starting from 16.1 before 16.1.1. A Regular Expression Denial of Service was possible via sending crafted payloads to the preview_markdown endpoint.

Affected products (as reported)

Vendor	Product	Versions
GitLab	GitLab	10.3 – before 15.11.1016.0 – before 16.0.616.1 – before 16.1.1

Weakness: CWE-1333 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

GitLab Issue #409802 issue-tracking
HackerOne Bug Bounty Report #1960970 technical-description, exploit