USN-7319-1: cmark-gfm vulnerabilities

USN-7319-1: cmark-gfm vulnerabilities
3 March 2025

Several security issues were fixed in cmark-gfm.

Releases
Ubuntu 24.10 Ubuntu 24.04 LTS Ubuntu 22.04 LTS Ubuntu 20.04 LTS

Packages
cmark-gfm - CommonMark parsing and rendering program, GitHub flavor

Details
It was discovered that cmark-gfm’s autolink extension did not correctly
handle parsing large inputs. An attacker could possibly use this issue
to cause a denial of service. This issue only affected Ubuntu 20.04 LTS
and Ubuntu 22.04 LTS. (CVE-2022-39209)

It was discovered that cmark-gfm did not correctly handle parsing large
inputs. An attacker could possibly use this issue to cause a denial of
service. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and
Ubuntu 24.10. (CVE-2023-22483)

It was discovered that cmark-gfm did not correctly handle parsing large
inputs. An attacker could possibly use this issue to cause a denial of
service. This issue only affected Ubuntu 24.04 LTS and Ubuntu 24.10.
(CVE-2023-22484)

It was discovered that cmark-gfm did not correctly handle parsing large
inputs. An attacker could possibly use this issue to cause a denial of
service. (CVE-2023-22486, CVE-2023-26485)

Update instructions
The problem can be corrected by updating your system to the following package versions:

Ubuntu 24.10

• cmark-gfm - 0.29.0.gfm.6-6ubuntu0.24.10.1
  Ubuntu 24.04
• cmark-gfm - 0.29.0.gfm.6-6ubuntu0.24.04.1~esm1
  Ubuntu 22.04
• cmark-gfm - 0.29.0.gfm.3-3ubuntu0.1~esm1
  Ubuntu 20.04
• cmark-gfm - 0.29.0.gfm.0-4ubuntu0.1~esm1
  In general, a standard system update will make all the necessary changes.