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GHSA-4qw4-jpp4-8gvp json

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

published 4y ago modified last yr.

cvss
—
not scored
cisa kev
Not listed
not in CISA's catalog
epss
—
no score, EPSS covers CVEs only
public exploits
0
none known

Summary

### Impact

CommonMarker uses `cmark-gfm` for rendering [Github Flavored Markdown](https://github.github.com/gfm/). 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](https://github.com/github/cmark-gfm)

### Acknowledgements

We would like to thank [Legit Security](https://www.legitsecurity.com) for reporting this vulnerability.

Patch / fix

  • rubygems commonmarker 0.23.6

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Affected packages

ecosystem package affected fixed in
rubygems commonmarker
<0.23.6
0.23.6

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.