Denial of Service in cmark-gfm <0.29.0.gfm.12 via Resource Exhaustion
CVE-2023-37463 Published on July 13, 2023

Quadratic complexity bugs may lead to a denial of service
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.

Github Repository NVD

Vulnerability Analysis

CVE-2023-37463 can be exploited with network access, and requires small amount of user privileges. This vulnerability is consided to have a high level of attack complexity. Public availability of a proof of concept (POC) exploit exists for CVE-2023-37463. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and a high impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
HIGH
Privileges Required:
LOW
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
LOW
Integrity Impact:
LOW
Availability Impact:
HIGH

Weakness Type

What is a Resource Exhaustion Vulnerability?

The software does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.

CVE-2023-37463 has been classified to as a Resource Exhaustion vulnerability or weakness.


Products Associated with CVE-2023-37463

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github Cmark Gfm
 

Affected Versions

github cmark-gfm Version < 0.29.0.gfm.12 is affected by CVE-2023-37463

Vulnerable Packages

The following package name and versions may be associated with CVE-2023-37463

Package Manager Vulnerable Package Versions Fixed In
rubygems commonmarker < 0.23.10 0.23.10

Exploit Probability

EPSS
0.33%
Percentile
56.01%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.