Discourse is an open source discussion platform. In affected versions a malicious user can cause a regular expression denial of service using a carefully crafted git URL. This issue is patched in the latest stable, beta and tests-passed versions of Discourse. Users are advised to upgrade. There are no known workarounds for this issue.
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 |
|---|---|---|---|
| Discourse | Discourse | * | 3.0.1 (excluding) |
| Discourse | Discourse | 3.1.0-beta1 (including) | 3.1.0-beta1 (including) |
Potential Mitigations
Related Attack Patterns
References
- https://github.com/discourse/discourse/commit/ec4c30270887366dc28788bc4ab8a22a098573cd
- https://github.com/discourse/discourse/security/advisories/GHSA-4w55-w26q-r35w
- https://github.com/discourse/discourse/commit/ec4c30270887366dc28788bc4ab8a22a098573cd
- https://github.com/discourse/discourse/security/advisories/GHSA-4w55-w26q-r35w