Quadratic complexity may lead to a denial of service in cmark-gfm

CVE-2023-24824

7.5HIGH

Key Information

Vendor
github
Status
cmark-gfm
Vendor
CVE Published:
31 March 2023

Summary

cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. A polynomial time complexity issue in cmark-gfm may lead to unbounded resource exhaustion and subsequent denial of service. This CVE covers quadratic complexity issues when parsing text which leads with either large numbers of > or - characters. This issue has been addressed in version 0.29.0.gfm.10. Users are advised to upgrade. Users unable to upgrade should validate that their input comes from trusted sources.

Affected Version(s)

cmark-gfm = < 0.29.0.gfm.10

Refferences

https://github.com/github/cmark-gfm/security/advisories/G...
x_refsource_CONFIRM
https://github.com/github/cmark-gfm/commit/2300c1bd2c8226...
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Collectors

NVD DatabaseMitre Database
.