An issue has been discovered in GitLab CE/EE affecting all versions from 12.7 prior to 16.6.6, 16.7 prior to 16.7.4, and 16.8 prior to 16.8.1 It was possible for an attacker to trigger a Regular Expression Denial of Service via a Cargo.toml containing maliciously crafted input.
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 | 12.7.0 (including) | 16.6.6 (excluding) |
| Gitlab | Gitlab | 16.7.0 (including) | 16.7.4 (excluding) |
| Gitlab | Gitlab | 16.8.0 (including) | 16.8.0 (including) |
| Gitlab | Ubuntu | esm-apps/xenial | * |
| Gitlab | Ubuntu | 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
Related Attack Patterns
References
- https://about.gitlab.com/releases/2024/01/25/critical-security-release-gitlab-16-8-1-released/
- https://gitlab.com/gitlab-org/gitlab/-/issues/431924
- https://hackerone.com/reports/2251278
- https://about.gitlab.com/releases/2024/01/25/critical-security-release-gitlab-16-8-1-released/
- https://gitlab.com/gitlab-org/gitlab/-/issues/431924
- https://hackerone.com/reports/2251278