CVE-2023-22484 Inefficient Quadratic complexity bug in handle_pointy_brace may lead to a denial of service
An attacker can cause denial of service in cmark-gfm by submitting input that triggers inefficient quadratic complexity during parsing.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-22484?
CVE-2023-22484 is a low-severity denial of service vulnerability in github cmark-gfm, published on 23 Jan 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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 a polynomial time complexity issue in cmark-gfm that may lead to unbounded resource exhaustion and subsequent denial of service. This vulnerability has been patched in 0.29.0.gfm.7.
Which versions are affected by CVE-2023-22484?
It affects 1 product.
Products include Github Cmark-Gfm.
How do I fix CVE-2023-22484?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-22484 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-22484 exists.
Other vulnerabilities in github cmark-gfm
- CVE-2024-22051 CommonMarker Integer Overflow Vulnerability
- CVE-2023-37463 Quadratic complexity bugs may lead to a denial of service
- CVE-2023-24824 Quadratic complexity may lead to a denial of service in cmark-gfm
- CVE-2023-26485 Quadratic complexity may lead to a denial of service in cmark-gfm
- CVE-2023-22485 cmark-gfm out-of-bounds read in validate_protocol
Sources
Also known as DEBIAN-CVE-2023-22484, GHSA-24f7-9frr-5h2r, UBUNTU-CVE-2023-22484.