Is CVE-2022-39209 in the CISA KEV catalog?

No. CVE-2022-39209 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-39209?

CVE-2022-39209 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2022-39209?

CVE-2022-39209 has an EPSS score of 1.64% (73th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-39209?

Upgrade cmark-gfm on debian 12 to 0.29.0.gfm.6-2 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2022-39209

HIGHEPSS 73th pctl

7.5

CVSS v3

NVD

Description

cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. In versions prior to 0.29.0.gfm.6 a polynomial time complexity issue in cmark-gfm's autolink extension may lead to unbounded resource exhaustion and subsequent denial of service. Users may verify the patch by running `python3 -c 'print("![l"* 100000 + "\n")' | ./cmark-gfm -e autolink`, which will resource exhaust on unpatched cmark-gfm but render correctly on patched cmark-gfm. This vulnerability has been patched in 0.29.0.gfm.6. Users are advised to upgrade. Users unable to upgrade should disable the use of the autolink extension.

CWE-400Resource Exhaustion CWE-407

How to fix

Remediation Available

cmark-gfmDebian

Fixed in:0.29.0.gfm.6-2CVE-2022-39209

cmark-gfmUbuntu

Fixed in:0.29.0.gfm.0-4ubuntu0.1~esm1USN-7319-1

Fixed in:0.29.0.gfm.3-3ubuntu0.1~esm1USN-7319-1

Fixed in:0.29.0.gfm.6-6ubuntu0.24.04.1~esm1USN-7319-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

1.64%probability of exploitation in 30 days

73rdpercentile

Elevated risk: more likely to be exploited than 73% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory2

Other references3

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.