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6.5
CVSSv3

CVE-2022-39209

Published: 15/09/2022 Updated: 07/11/2023
CVSS v3 Base Score: 6.5 | Impact Score: 3.6 | Exploitability Score: 2.8
VMScore: 0
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Vulnerability Summary

cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. In versions before 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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github cmark-gfm

fedoraproject fedora 35

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fedoraproject fedora 37

Vendor Advisories

Debian CVElist Bug Report Logs: cmark-gfm: CVE-2022-39209
Debian Bug report logs - #1020588 cmark-gfm: CVE-2022-39209 Package: src:cmark-gfm; Maintainer for src:cmark-gfm is Keith Packard <keithp@keithpcom>; Reported by: Salvatore Bonaccorso <carnil@debianorg> Date: Fri, 23 Sep 2022 20:24:02 UTC Severity: important Tags: security, upstream Found in version cmark-gfm/029 ...
Red Hat:
Description The MITRE CVE dictionary describes this issue as: cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C In versions prior to 0290gfm6 a polynomial time complexity issue in cmark-gfm's autolink extension may lead to unbounded resource exhaustion and subsequent denial of service Users ...

References

CWE-407https://github.com/github/cmark-gfm/security/advisories/GHSA-cgh3-p57x-9q7qhttps://en.wikipedia.org/wiki/Time_complexityhttps://github.com/github/cmark-gfm/commit/9d57d8a23142b316282bdfc954cb0ecda40a8655https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JMGP65NANDVKPDMXMKYO2ZV2H2HZJY4P/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JIUCZN3PEKUCT2JQYQTYOVIJG2KSD6G7/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UEAAAI4OULDYQ2TA3HOXH54PC3DCBFZS/https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1020588https://nvd.nist.govhttps://access.redhat.com/security/cve/cve-2022-39209
CVSSv3
CVSSv2
CVSSv3
VMScore
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