A Regular Expression Denial of Service vulnerability in GitLab CE/EE affecting all versions from 1.0.2 prior to 14.10.5, 15.0 prior to 15.0.4, and 15.1 prior to 15.1.1 allows an attacker to make a GitLab instance inaccessible via specially crafted web server response headers
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 | 1.0.2 (including) | 14.10.5 (excluding) |
| Gitlab | Gitlab | 15.0.0 (including) | 15.0.4 (excluding) |
| Gitlab | Gitlab | 15.1.0 (including) | 15.1.0 (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
Related Attack Patterns
References
- https://gitlab.com/gitlab-org/cves/-/blob/master/2022/CVE-2022-1954.json
- https://gitlab.com/gitlab-org/gitlab/-/issues/358160
- https://hackerone.com/reports/1531958
- https://gitlab.com/gitlab-org/cves/-/blob/master/2022/CVE-2022-1954.json
- https://gitlab.com/gitlab-org/gitlab/-/issues/358160
- https://hackerone.com/reports/1531958