CVE-2022-23516

Uncontrolled Recursion in Loofah

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Loofah >= 2.2.0, < 2.19.1 uses recursion for sanitizing CDATA sections, making it susceptible to stack exhaustion and raising a SystemStackError exception. This may lead to a denial of service through CPU resource consumption. This issue is patched in version 2.19.1. Users who are unable to upgrade may be able to mitigate this vulnerability by limiting the length of the strings that are sanitized.

Loofah es una librería general para manipular y transformar documentos y fragmentos HTML/XML, construida sobre Nokogiri. Loofah versiones >= 2.2.0 y < 2.19.1 usa recursividad para sanitizar secciones CDATA, lo que la hace susceptible al agotamiento de la pila de memoria y genera una excepción SystemStackError. Esto puede provocar una denegación de servicio debido al consumo de recursos de la CPU. Este problema se solucionó en la versión 2.19.1. Los usuarios que no puedan actualizar pueden mitigar esta vulnerabilidad limitando la longitud de las cadenas que se sanitizan.

An uncontrolled recursion vulnerability was found in rubygem loofah. While sanitizing certain sections, loofah is susceptible to stack exhaustion, which can result in a denial of service through CPU resource consumption.

*Credits: N/A

CVSS Scores

NISTv3.1 7.5

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2022-01-19 CVE Reserved
2022-12-14 CVE Published
2024-07-06 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-674: Uncontrolled Recursion

CAPEC

References (4)

URL	Tag	Source
https://github.com/flavorjones/loofah/security/advisories/GHSA-3x8r-x6xp-q4vm	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/09/msg00011.html

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2022-23516	2023-05-03
https://bugzilla.redhat.com/show_bug.cgi?id=2153241	2023-05-03

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Loofah Project Search vendor "Loofah Project"		Loofah Search vendor "Loofah Project" for product "Loofah"				>= 2.2.0 < 2.19.1 Search vendor "Loofah Project" for product "Loofah" and version " >= 2.2.0 < 2.19.1"		ruby		Affected