CVE Vulnerabilities

CVE-2023-6502

Inefficient Regular Expression Complexity

Published: May 23, 2024 | Modified: Dec 16, 2024
CVSS 3.x
6.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
RedHat/V2
RedHat/V3
Ubuntu
MEDIUM

A Denial of Service (DoS) condition has been discovered in GitLab CE/EE affecting all versions before 16.10.6, version 16.11 before 16.11.3, and 17.0 before 17.0.1. It is possible for an attacker to cause a denial of service using a crafted wiki page.

Weakness

The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles.

Affected Software

Name Vendor Start Version End Version
Gitlab Gitlab * 16.10.6 (excluding)
Gitlab Gitlab 16.11.0 (including) 16.11.3 (excluding)
Gitlab Gitlab 17.0.0 (including) 17.0.0 (including)
Gitlab Ubuntu esm-apps/xenial *

Extended Description

	  Attackers can create crafted inputs that
	  intentionally cause the regular expression to use
	  excessive backtracking in a way that causes the CPU
	  consumption to spike.

Potential Mitigations

References