Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS00cXc0LWpwcDQtOGd2cM4AAu97

Unbounded resource exhaustion in cmark-gfm autolink extension may lead to denial of service

Impact

CommonMarker uses cmark-gfm for rendering Github Flavored Markdown. A polynomial time complexity issue in cmark-gfm's autolink extension may lead to unbounded resource exhaustion and subsequent denial of service.

Patches

This vulnerability has been patched in the following CommonMarker release:

• v0.23.6

Workarounds

Disable use of the autolink extension.

References

https://github.com/gjtorikian/commonmarker/pull/190
https://github.com/github/cmark-gfm/security/advisories/GHSA-cgh3-p57x-9q7q
https://en.wikipedia.org/wiki/Time_complexity

For more information

If you have any questions or comments about this advisory:

• Open an issue in github/cmark-gfm

Acknowledgements

We would like to thank Legit Security for reporting this vulnerability.

Permalink: https://github.com/advisories/GHSA-4qw4-jpp4-8gvp
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS00cXc0LWpwcDQtOGd2cM4AAu97
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: over 1 year ago
Updated: over 1 year ago

Identifiers: GHSA-4qw4-jpp4-8gvp
References:

• https://github.com/gjtorikian/commonmarker/security/advisories/GHSA-4qw4-jpp4-8gvp
• https://github.com/gjtorikian/commonmarker/pull/190
• https://github.com/gjtorikian/commonmarker/releases/tag/v0.23.6
• https://github.com/advisories/GHSA-4qw4-jpp4-8gvp

Repository: https://github.com/gjtorikian/commonmarker
Blast Radius: 0.0

Affected Packages