Gentoo update for RedCloth

1) Inefficient regular expression complexity

EUVDB-ID: #VU80753

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-31606

CWE-ID: CWE-1333 - Inefficient Regular Expression Complexity

Exploit availability: No

Description

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

The vulnerability exists due to insufficient input validation when processing untrusted input with a regular expressions within the sanitize_html() function in lib/redcloth/formatters/html.rb. A remote attacker can pass specially crafted data to the application and perform regular expression denial of service (ReDos) attack.

Mitigation

Update the affected packages.
dev-ruby/redcloth to version: 4.3.2-r5

Vulnerable software versions

Gentoo Linux: All versions

dev-ruby/redcloth: before 4.3.2-r5

CPE2.3

• cpe:2.3:o:gentoo:gentoo_linux:*:*:*:*:*:*:*:
• cpe:2.3:o:gentoo:dev-ruby_redcloth:*:*:*:*:*:gentoo_linux:*:

External links

http://security.gentoo.org/glsa/202401-14

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.