جزئیات آسیب‌پذیری

LobeChat before version 2.2.10-canary.15 contains a regular expression denial of service (ReDoS) vulnerability that allows authenticated attackers to block the Node.js event loop by supplying a catastrophic-backtracking pattern in a GitHub repository URL path during skill import. Attackers can craft a malicious basePath value containing unescaped regex metacharacters such as catastrophic-backtracking patterns, which are injected into a dynamically constructed regular expression in the findSkillMd function and executed synchronously against archive entries, denying service to all concurrent users for tens of seconds per request.

• https://github.com/lobehub/lobehub/releases/tag/v2.2.10-canary.15 release-notes
• https://github.com/lobehub/lobehub/issues/16494 exploittechnical-descriptionissue-tracking
• https://github.com/lobehub/lobehub/pull/16548 issue-trackingpatch
• https://github.com/lobehub/lobehub/commit/349bbe326eb8635d6d9c6a96d12702681ae3a84a patch
• https://www.vulncheck.com/advisories/lobechat-canary-15-regular-expression-denial-of-service-in-github-skill-import third-party-advisory