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CVE-2022-21680

Description

Marked is a markdown parser and compiler. Prior to version 4.0.10, the regular expression `block.def` may cause catastrophic backtracking against some strings and lead to a regular expression denial of service (ReDoS). Anyone who runs untrusted markdown through a vulnerable version of marked and does not use a worker with a time limit may be affected. This issue is patched in version 4.0.10. As a workaround, avoid running untrusted markdown through marked or run marked on a worker thread and set a reasonable time limit to prevent draining resources.

POC

Reference

- https://github.com/markedjs/marked/security/advisories/GHSA-rrrm-qjm4-v8hf

Github

- https://github.com/ARPSyndicate/cvemon

- https://github.com/HotDB-Community/HotDB-Engine

- https://github.com/engn33r/awesome-redos-security