Description
Semantic MediaWiki 3.0.0 before 7.3.1 contains an uncontrolled recursion vulnerability in LegacyParser::getSubqueryDescription() that processes nested query tokens before depth limits apply. Unauthenticated attackers can submit deeply nested query elements to the action=ask API to consume substantial CPU and memory, tying up request workers.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| SemanticMediaWiki | SemanticMediaWiki | 3.0.0 – < 7.3.1 | 7.3.1 |
References
- GitHub Security Advisory (GHSA-f8vw-wvm6-h2qq) vendor-advisory
- https://github.com/SemanticMediaWiki/SemanticMediaWiki/commit/756492002752f937a9e115e14330b1181bd8c60c patch
- https://github.com/SemanticMediaWiki/SemanticMediaWiki/commit/e642f38c708dee7da5e885b8d40be8ffc56f3e87 patch
- VulnCheck Advisory: Semantic MediaWiki 3.0.0 before 7.3.1 Uncontrolled Recursion via Special:Ask third-party-advisory