CVE-2022-21680
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).
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.83%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 2.83% probability · 86th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-400, CWE-1333
- Affected
- marked project/marked · fedoraproject/fedora
- Source
- security-advisories@github.com
References
- https://github.com/markedjs/marked/commit/c4a3ccd344b6929afa8a1d50ac54a721e57012c0Patch, Third Party Advisory
- https://github.com/markedjs/marked/releases/tag/v4.0.10Release Notes, Third Party Advisory
- https://github.com/markedjs/marked/security/advisories/GHSA-rrrm-qjm4-v8hfExploit, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AIXDMC3CSHYW3YWVSQOXAWLUYQHAO5UX/
- https://github.com/markedjs/marked/commit/c4a3ccd344b6929afa8a1d50ac54a721e57012c0Patch, Third Party Advisory
- https://github.com/markedjs/marked/releases/tag/v4.0.10Release Notes, Third Party Advisory
- https://github.com/markedjs/marked/security/advisories/GHSA-rrrm-qjm4-v8hfExploit, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AIXDMC3CSHYW3YWVSQOXAWLUYQHAO5UX/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.