PT-2022-24809 · Cmark-Gfm+3 · Cmark-Gfm+3

Anticomputer · Published 2022-09-15 · Updated 2025-03-03 · CVE-2022-39209

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions cmark-gfm versions prior to 0.29.0.gfm.6

Description A polynomial time complexity issue in cmark-gfm's autolink extension may lead to unbounded resource exhaustion and subsequent denial of service. Users can verify the patch by running python3 -c 'print("![l"* 100000 + " ")' | ./cmark-gfm -e autolink, which will resource exhaust on unpatched cmark-gfm but render correctly on patched cmark-gfm.

Recommendations To resolve the issue, users are advised to upgrade to version 0.29.0.gfm.6 or later. Users unable to upgrade should disable the use of the autolink extension as a temporary workaround.

Exploit

Fix

DoS

Resource Exhaustion

Weakness Enumeration

CWE-400

CWE-407

Related Identifiers

CVE-2022-39209

GHSA-CGH3-P57X-9Q7Q

RSEC-2023-7

USN-7319-1

Affected Products

Debian

Linuxmint

Ubuntu

Cmark-Gfm

References · 27

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/39xxx/CVE-2022-39209.json · Exploit
• https://github.com/github/cmark-gfm/commit/9d57d8a23142b316282bdfc954cb0ecda40a8655 · Patch
• https://security-tracker.debian.org/tracker/CVE-2022-24724 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JIUCZN3PEKUCT2JQYQTYOVIJG2KSD6G7 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-22486 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-22483 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2022-39209 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-22484 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-39209 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2022-39209 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-39209 · Vendor Advisory
• https://osv.dev/vulnerability/USN-7319-1 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UEAAAI4OULDYQ2TA3HOXH54PC3DCBFZS · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JMGP65NANDVKPDMXMKYO2ZV2H2HZJY4P · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-26485 · Vendor Advisory