CVE-2022-39209: Uncontrolled Resource Consumption in cmark-gfm
First published: Thu Sep 15 2022(Updated: )
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("
Reference Links
- https://en.wikipedia.org/wiki/Time_complexity
- https://github.com/github/cmark-gfm/commit/9d57d8a23142b316282bdfc954cb0ecda40a8655
- https://github.com/github/cmark-gfm/security/advisories/GHSA-cgh3-p57x-9q7q
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JIUCZN3PEKUCT2JQYQTYOVIJG2KSD6G7/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JMGP65NANDVKPDMXMKYO2ZV2H2HZJY4P/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UEAAAI4OULDYQ2TA3HOXH54PC3DCBFZS/
- https://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/
Frequently Asked Questions
What is CVE-2022-39209?
CVE-2022-39209 is a vulnerability in cmark-gfm, GitHub's fork of cmark, which could lead to unbounded resource exhaustion and denial of service.
What is the severity of CVE-2022-39209?
The severity of CVE-2022-39209 is high with a severity score of 6.5.
How does CVE-2022-39209 affect cmark-gfm?
CVE-2022-39209 affects cmark-gfm versions prior to 0.29.0.gfm.6 and may lead to unbounded resource exhaustion and subsequent denial of service.
How can I verify if my version of cmark-gfm is affected by CVE-2022-39209?
You can verify if your version of cmark-gfm is affected by CVE-2022-39209 by checking the patch version. Versions prior to 0.29.0.gfm.6 are affected.
How can I fix CVE-2022-39209?
To fix CVE-2022-39209, you should update cmark-gfm to version 0.29.0.gfm.6 or newer.
- collector/nvd-index
- agent/weakness
- agent/type
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/references
- agent/last-modified-date
- agent/author
- agent/severity
- agent/remedy
- agent/title
- agent/description
- agent/first-publish-date
- agent/event
- agent/tags
- vendor/github
- canonical/github cmark-gfm
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/35
- version/fedoraproject fedora/36
- version/fedoraproject fedora/37