cmark-gfm Quadratic complexity bug in handle_close_bracket may lead to a denial of service
CVE-2023-22486

7.5HIGH

Key Information:

Vendor
github
Status
cmark-gfm
Vendor
CVE Published:
26 January 2023

Summary

The cmark-gfm library, a GitHub fork of the CommonMark parsing and rendering tool, exhibits a polynomial time complexity flaw in the handle_close_bracket function. This issue can lead to unbounded resource exhaustion, compromising system efficiency by triggering a denial of service, especially in applications relying on this library for markdown rendering. The vulnerability has been addressed in version 0.29.0.gfm.7, highlighting the importance of upgrading to maintain optimal performance and security.

Affected Version(s)

cmark-gfm < 0.29.0.gfm.7

References

https://github.com/github/cmark-gfm/security/advisories/G...
x_refsource_CONFIRM

CVSS V3.1

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

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.