VDB-215628 · CVE-2022-23516 · GHSA-3x8r-x6xp-q4vm

Loofah prior 2.19.1 recursion

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.7	$0-$5k	0.00

Summaryinfo

A vulnerability classified as problematic was found in Loofah. The affected element is an unknown function. The manipulation results in recursion. This vulnerability was named CVE-2022-23516. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Loofah. It has been classified as problematic. Affected is an unknown function. The manipulation with an unknown input leads to a recursion vulnerability. CWE is classifying the issue as CWE-674. The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack. This is going to have an impact on availability. CVE summarizes:

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.

The weakness was presented 12/13/2022. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2022-23516 since 01/19/2022. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability scanner Nessus provides a plugin with the ID 207898 (Debian dla-3901 : ruby-loofah - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.19.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (207898). Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Loofah

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.7

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 7.5
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Recursion
CWE: CWE-674 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 207898
Nessus Name: Debian dla-3901 : ruby-loofah - security update

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Loofah 2.19.1

Timelineinfo

01/19/2022 🔍
12/13/2022 +328 days 🔍
12/13/2022 +0 days 🔍
11/05/2025 +1058 days 🔍

Sourcesinfo

Advisory: GHSA-3x8r-x6xp-q4vm
Status: Confirmed

CVE: CVE-2022-23516 (🔍)
GCVE (CVE): GCVE-0-2022-23516
GCVE (VulDB): GCVE-100-215628

Entryinfo

Created: 12/13/2022 22:58
Updated: 11/05/2025 13:49
Changes: 12/13/2022 22:58 (35), 01/09/2023 07:04 (2), 01/09/2023 07:14 (12), 09/29/2024 04:50 (17), 11/05/2025 13:49 (13)
Complete: 🔍
Cache ID: 216::103