High severity · published Jul 13, 2023
CVE-2023-37463
Quadratic complexity bugs may lead to a denial of service
7.5
CVSS
0.7%
EPSS
No
On KEV
Description
cmark-gfm is an extended version of the C reference implementation of CommonMark, a rationalized version of Markdown syntax with a spec. Three polynomial time complexity issues in cmark-gfm may lead to unbounded resource exhaustion and subsequent denial of service. These vulnerabilities have been patched in 0.29.0.gfm.12.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 53% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CM
cmark-gfm · github
< 0.29.0.gfm.12 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-37463
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-37463
Release Notes
https://github.com/github/cmark-gfm/releases/tag/0.29.0.gfm.12
Exploit
https://github.com/github/cmark-gfm/security/advisories/GHSA-w4qg-3vf7-m9x5
More from cmark-gfm
9.8
CVE-2024-22051
CommonMarker Integer Overflow Vulnerability
9.8
CVE-2022-24724
cmark-gfm is GitHub's extended version of the C reference implementation of CommonMark
7.5
CVE-2023-24824
Quadratic complexity may lead to a denial of service in cmark-gfm
7.5
CVE-2023-26485
Quadratic complexity may lead to a denial of service in cmark-gfm
7.5
CVE-2023-22486
cmark-gfm Quadratic complexity bug in handle_close_bracket may lead to a denial of service