Security restrictions bypass in Nokogiri

1) Incorrect Regular Expression

EUVDB-ID: #VU64190

Risk: Low

CVSSv3.1: 3.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-24836

CWE-ID: CWE-185 - Incorrect Regular Expression

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to usage of an incorrect regular expression that is susceptible to excessive backtracking when attempting to detect encoding in HTML documents. A remote attacker can bypass implemented restrictions.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Nokogiri: 1.4.4 - 1.13.3

External links

http://github.com/sparklemotion/nokogiri/security/advisories/GHSA-crjr-9rc5-ghw8
http://github.com/sparklemotion/nokogiri/commit/e444525ef1634b675cd1cf52d39f4320ef0aecfd
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XMDCWRQXJQ3TFSETPCEFMQ6RR6ME5UA3/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OUPLBUZVM4WPFSXBEP2JS3R6LMKRTLFC/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6DHCOWMA5PQTIQIMDENA7R2Y5BDYAIYM/
http://lists.debian.org/debian-lts-announce/2022/05/msg00013.html

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.