CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
55.1%
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.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Debian | 12 | all | cmark-gfm | < 0.29.0.gfm.6-2 | cmark-gfm_0.29.0.gfm.6-2_all.deb |
Debian | 11 | all | cmark-gfm | <= 0.29.0.gfm.0-6 | cmark-gfm_0.29.0.gfm.0-6_all.deb |
Debian | 999 | all | cmark-gfm | < 0.29.0.gfm.6-2 | cmark-gfm_0.29.0.gfm.6-2_all.deb |
Debian | 13 | all | cmark-gfm | < 0.29.0.gfm.6-2 | cmark-gfm_0.29.0.gfm.6-2_all.deb |
Debian | 12 | all | ghostwriter | < 2.1.6+ds-1 | ghostwriter_2.1.6+ds-1_all.deb |
Debian | 11 | all | ghostwriter | <= 1.8.1-2 | ghostwriter_1.8.1-2_all.deb |
Debian | 999 | all | ghostwriter | < 2.1.6+ds-1 | ghostwriter_2.1.6+ds-1_all.deb |
Debian | 13 | all | ghostwriter | < 2.1.6+ds-1 | ghostwriter_2.1.6+ds-1_all.deb |
Debian | 12 | all | python-cmarkgfm | <= 0.8.0-3 | python-cmarkgfm_0.8.0-3_all.deb |
Debian | 11 | all | python-cmarkgfm | <= 0.4.2-1 | python-cmarkgfm_0.4.2-1_all.deb |