cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. In versions prior to 0.29.0.gfm.6 a polynomial time complexity issue in cmark-gfm's autolink extension may lead to unbounded resource exhaustion and subsequent denial of service. Users may verify the patch by running `python3 -c 'print("![l"* 100000 + "\n")' | ./cmark-gfm -e autolink`, which will resource exhaust on unpatched cmark-gfm but render correctly on patched cmark-gfm. This vulnerability has been patched in 0.29.0.gfm.6. Users are advised to upgrade. Users unable to upgrade should disable the use of the autolink extension.
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Advisories
| Source | ID | Title |
|---|---|---|
EUVD |
EUVD-2022-41748 | cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. In versions prior to 0.29.0.gfm.6 a polynomial time complexity issue in cmark-gfm's autolink extension may lead to unbounded resource exhaustion and subsequent denial of service. Users may verify the patch by running `python3 -c 'print("![l"* 100000 + "\n")' | ./cmark-gfm -e autolink`, which will resource exhaust on unpatched cmark-gfm but render correctly on patched cmark-gfm. This vulnerability has been patched in 0.29.0.gfm.6. Users are advised to upgrade. Users unable to upgrade should disable the use of the autolink extension. |
Ubuntu USN |
USN-7319-1 | cmark-gfm vulnerabilities |
Fixes
Solution
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Workaround
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References
History
Wed, 23 Apr 2025 17:15:00 +0000
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ssvc
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2025-04-23T17:10:11.051Z
Reserved: 2022-09-02T00:00:00.000Z
Link: CVE-2022-39209
Updated: 2024-08-03T12:00:42.513Z
Status : Modified
Published: 2022-09-15T18:15:12.260
Modified: 2024-11-21T07:17:47.487
Link: CVE-2022-39209
OpenCVE Enrichment
No data.
EUVD
Ubuntu USN