GitHub cmark-gfm up to 0.29.0.gfm.6 CommonMark Parsing handle_close_bracket algorithmic complexity

CVSS Meta Temp Score
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CTI Interest Score
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5.0$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in GitHub cmark-gfm up to 0.29.0.gfm.6. This issue affects the function handle_close_bracket of the component CommonMark Parsing. The manipulation leads to algorithmic complexity. This vulnerability is uniquely identified as CVE-2023-22486. The attack is possible to be carried out remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in GitHub cmark-gfm up to 0.29.0.gfm.6 (Bug Tracking Software). This issue affects the function handle_close_bracket of the component CommonMark Parsing. The manipulation with an unknown input leads to a algorithmic complexity vulnerability. Using CWE to declare the problem leads to CWE-407. An algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached. Impacted is availability. The summary by CVE is:

cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. Versions prior to 0.29.0.gfm.7 contain a polynomial time complexity issue in handle_close_bracket that may lead to unbounded resource exhaustion and subsequent denial of service. This vulnerability has been patched in 0.29.0.gfm.7.

The weakness was disclosed 01/27/2023 as GHSA-r572-jvj2-3m8p. The advisory is shared at github.com. The identification of this vulnerability is CVE-2023-22486 since 12/29/2022. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 218384 (Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 : cmark-gfm vulnerabilities (USN-7319-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 0.29.0.gfm.7 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (218384). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Vendor

Name

Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 5.0

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 3.5
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Algorithmic complexity
CWE: CWE-407 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 218384
Nessus Name: Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 : cmark-gfm vulnerabilities (USN-7319-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: cmark-gfm 0.29.0.gfm.7

Timelineinfo

12/29/2022 🔍
01/27/2023 +29 days 🔍
01/27/2023 +0 days 🔍
03/04/2025 +767 days 🔍

Sourcesinfo

Product: github.com

Advisory: GHSA-r572-jvj2-3m8p
Status: Confirmed

CVE: CVE-2023-22486 (🔍)
GCVE (CVE): GCVE-0-2023-22486
GCVE (VulDB): GCVE-100-219377

Entryinfo

Created: 01/27/2023 09:00
Updated: 03/04/2025 14:23
Changes: 01/27/2023 09:00 (54), 02/19/2023 17:24 (11), 03/04/2025 14:23 (17)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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