GMS-2023-123: Several quadratic complexity bugs may lead to denial of service in Commonmarker

January 24, 2023

Impact

Several quadratic complexity bugs in commonmarker’s underlying cmark-gfm library may lead to unbounded resource exhaustion and subsequent denial of service.

The following vulnerabilities were addressed:

CVE-2023-22483
CVE-2023-22484
CVE-2023-22485
CVE-2023-22486

For more information, consult the release notes for version 0.23.0.gfm.7.

Mitigation

Users are advised to upgrade to commonmarker version 0.23.7.

References

github.com/advisories/GHSA-636f-xm5j-pj9m
github.com/gjtorikian/commonmarker/security/advisories/GHSA-636f-xm5j-pj9m

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