CVE-2023-22485 cmark-gfm out-of-bounds read in validate_protocol
A crafted markdown document triggers an out-of-bounds read in cmark-gfm, potentially causing a crash or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-22485?
CVE-2023-22485 is a medium-severity vulnerability in github cmark-gfm, published on 24 Jan 2023. An attacker can exploit it over the internet without logging in, 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. In versions prior 0.29.0.gfm.7, a crafted markdown document can trigger an out-of-bounds read in the `validate_protocol` function. We believe this bug is harmless in practice, because the out-of-bounds read accesses `malloc` metadata without causing any visible damage.This vulnerability has been patched in 0.29.0.gfm.7.
Which versions are affected by CVE-2023-22485?
It affects 1 product.
Products include Github Cmark-Gfm.
How do I fix CVE-2023-22485?
Upgrade to a fixed version.
Is CVE-2023-22485 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-22485 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-2023-22486 cmark-gfm Quadratic complexity bug in handle_close_bracket may lead to a denial of service
Sources
Also known as DEBIAN-CVE-2023-22485, GHSA-c944-cv5f-hpvr, UBUNTU-CVE-2023-22485.