An issue has been discovered in GitLab affecting all versions starting from 15.11 before 16.1.5, all versions starting from 16.2 before 16.2.5, all versions starting from 16.3 before 16.3.1. An authenticated user could trigger a denial of service when importing or cloning malicious content.
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 | 15.11 (including) | 16.1.5 (excluding) |
| Gitlab | Gitlab | 16.2 (including) | 16.2.5 (excluding) |
| Gitlab | Gitlab | 16.3.0 (including) | 16.3.0 (including) |
| Gitlab | Ubuntu | bionic | * |
| Gitlab | Ubuntu | esm-apps/xenial | * |
| Gitlab | Ubuntu | trusty | * |
| 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.