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Vulnerability · Published Jul 13, 2023 · Assigned by GitHub_M

CVE-2023-37463Quadratic complexity bugs may lead to a denial of service

Medium 6.4

In plain English

A medium-severity uncontrolled resource consumption in cmark-gfm from github. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.4Medium
Exploit odds (30 days)0.7%top 46.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

cmark-gfm is an extended version of the C reference implementation of CommonMark, a rationalized version of Markdown syntax with a spec. Three polynomial time complexity issues in cmark-gfm may lead to unbounded resource exhaustion and subsequent denial of service. These vulnerabilities have been patched in 0.29.0.gfm.12.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12cmark-gfmno fix listedDEBIAN-CVE-2023-37463
Debian:13cmark-gfm0.29.0.gfm.13-1DEBIAN-CVE-2023-37463
Debian:14cmark-gfm0.29.0.gfm.13-1DEBIAN-CVE-2023-37463
Debian:12python-cmarkgfmno fix listedDEBIAN-CVE-2023-37463
Debian:13python-cmarkgfm2024.11.20-1DEBIAN-CVE-2023-37463
Debian:14python-cmarkgfm2024.11.20-1DEBIAN-CVE-2023-37463
Debian:12r-cran-commonmarkno fix listedDEBIAN-CVE-2023-37463
Debian:13r-cran-commonmark1.9.1-1DEBIAN-CVE-2023-37463
Debian:14r-cran-commonmark1.9.1-1DEBIAN-CVE-2023-37463
Debian:12ruby-commonmarkerno fix listedDEBIAN-CVE-2023-37463
Debian:13ruby-commonmarker0.23.10-1DEBIAN-CVE-2023-37463
Debian:14ruby-commonmarker0.23.10-1DEBIAN-CVE-2023-37463

Affected products (as reported)

VendorProductVersions
github cmark-gfm < 0.29.0.gfm.12

Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H

References