GitLab has remediated an issue in GitLab CE/EE affecting all versions from 9.2 before 18.7.5, 18.8 before 18.8.5, and 18.9 before 18.9.1 that could have allowed an unauthenticated user to cause regular expression denial of service by sending specially crafted input to a merge request endpoint under certain conditions.
Weakness
The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Gitlab | Gitlab | 9.2.0 (including) | 18.7.5 (excluding) |
| Gitlab | Gitlab | 18.8.0 (including) | 18.8.5 (excluding) |
| Gitlab | Gitlab | 18.9.0 (including) | 18.9.0 (including) |
| Gitlab | Ubuntu | esm-apps-legacy/xenial | * |
| Gitlab | Ubuntu | esm-apps/xenial | * |