Multiple vulnerabilities in cmark

Published: 2023-01-24

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2023-22486 CVE-2023-22484
CWE-ID	CWE-407
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	cmark Other software / Other software solutions
Vendor	CommonMark

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Inefficient Algorithmic Complexity

EUVDB-ID: #VU71459

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-22486

CWE-ID: CWE-407 - Inefficient Algorithmic Complexity

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a polynomial time complexity issue in cmark-gfm in handle_close_bracket. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

cmark: 0.30.0 - 0.30.2

CPE2.3

External links

https://github.com/github/cmark-gfm/security/advisories/GHSA-r572-jvj2-3m8p

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Inefficient Algorithmic Complexity

EUVDB-ID: #VU71460