What is CVE-2023-37463?

CVE-2023-37463 is a medium-severity vulnerability in Github Cmark-Gfm, classified under Uncontrolled Resource Consumption. CVSS score: 6.4/10. Published 2023-07-13.

How severe is CVE-2023-37463?

Medium severity. CVSS v3 base score is 6.4 out of 10.

Is CVE-2023-37463 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Resource exhaustion in Github Cmark-Gfm

CVE-2023-37463

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.

Vulnerability class: DoS (Denial of Service)

EPSS: 0.007 (49.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H.

Affected products

Github Cmark-gfm — versions < 0.29.0.gfm.12

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit)
security-advisories@github.com (x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2023-37463?: CVE-2023-37463 is a medium-severity vulnerability in Github Cmark-Gfm, classified under Uncontrolled Resource Consumption. CVSS score: 6.4/10. Published 2023-07-13.
How severe is CVE-2023-37463?: Medium severity. CVSS v3 base score is 6.4 out of 10.
Is CVE-2023-37463 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.