CVE-2023-22483: github cmark-gfm Uncontrolled Resource Consumption

Vulnerability summary

CVE-2023-22483 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in github cmark-gfm. EPSS estimates a 1.07% chance of exploitation in the next 30 days, higher than 64.6% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 23-01-2023
   PublishedVulnerability first disclosed.
2. 10-03-2025
   Last modifiedVulnerability information updated.

Description

cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. Versions prior to 0.29.0.gfm.7 are subject to several polynomial time complexity issues in cmark-gfm that may lead to unbounded resource exhaustion and subsequent denial of service. Various commands, when piped to cmark-gfm with large values, cause the running time to increase quadratically. These vulnerabilities have been patched in version 0.29.0.gfm.7.

• 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.