CVE-2023-22486: cmark-gfm Quadratic complexity bug in handle_close_bracket may lead to a denial of service
First published: Tue Jan 24 2023(Updated: )
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 contain a polynomial time complexity issue in handle_close_bracket that may lead to unbounded resource exhaustion and subsequent denial of service. This vulnerability has been patched in 0.29.0.gfm.7.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Github Cmark-gfm | <0.29.0.gfm.7 |
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Frequently Asked Questions
What is CVE-2023-22486?
CVE-2023-22486 is a vulnerability in cmark-gfm, a CommonMark parsing and rendering library and program in C, that can lead to unbounded resource exhaustion and subsequent denial of service.
What is the severity of CVE-2023-22486?
The severity of CVE-2023-22486 is high with a score of 7.5 out of 10.
How does CVE-2023-22486 affect cmark-gfm?
Versions prior to 0.29.0.gfm.7 of cmark-gfm are affected by CVE-2023-22486.
How can CVE-2023-22486 be exploited?
CVE-2023-22486 can be exploited by an attacker to exploit the polynomial time complexity issue in handle_close_bracket, causing unbounded resource exhaustion.
Is there a fix available for CVE-2023-22486?
Yes, upgrading to version 0.29.0.gfm.7 or later of cmark-gfm fixes the vulnerability.
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