#VU70330 Uncontrolled Recursion in Loofah - CVE-2022-23516

Vulnerability identifier: #VU70330

Vulnerability 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-2022-23516

CWE-ID: CWE-674

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Loofah
Universal components / Libraries / Libraries used by multiple products

Vendor: Mike Dalessio

Description

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

The vulnerability exists due to uncontrolled recursion when handling CDATA sections. A remote attacker can pass specially crafted data to the application and consume excessive CPU resources.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Loofah: 2.2.0 - 2.19.0

---

External links
https://github.com/flavorjones/loofah/releases/tag/v2.19.1
https://github.com/flavorjones/loofah/security/advisories/GHSA-3x8r-x6xp-q4vm

---

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.