CVE-2023-24824: github cmark-gfm Uncontrolled Resource Consumption

Vulnerability summary

CVE-2023-24824 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in github cmark-gfm. EPSS estimates a 1.04% chance of exploitation in the next 30 days, higher than 63.3% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 31-03-2023
   PublishedVulnerability first disclosed.
2. 11-02-2025
   Last modifiedVulnerability information updated.

Description

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.

• CWE-400Uncontrolled Resource ConsumptionThe product does not properly control the allocation and maintenance of a limited resource.
• CWE-407Inefficient Algorithmic ComplexityAn algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached.