An issue was discovered in GitLab CE/EE affecting all versions starting from 9.2 prior to 16.11.5, starting from 17.0 prior to 17.0.3, and starting from 17.1 prior to 17.1.1, with the processing logic for generating link in dependency files can lead to a regular expression DoS attack on the server
The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Gitlab | Gitlab | 9.2.0 (including) | 16.11.5 (excluding) |
| Gitlab | Gitlab | 17.0.0 (including) | 17.0.3 (excluding) |
| Gitlab | Gitlab | 17.1.0 (including) | 17.1.0 (including) |
| Gitlab | Ubuntu | esm-apps/xenial | * |
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.