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CVE-2022-23514— Inefficient Regular Expression Complexity in Loofah

Quick assessment

Affected
flavorjones loofah
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Loofah gem for Ruby是一款基于Ruby的、用于处理和转换HTML/XML文档的库。 Loofah gem for Ruby 2.19.1之前版本存在安全漏洞，该漏洞源于包含一个低效的正则表达式，在尝试清理某些 SVG 属性时容易受到过度回溯的影响， 这可能会因 CPU 资源消耗而导致拒绝服务。

CVSS 7.5 · High EPSS 1.76% · P77

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2022-23514

Vulnerability Information
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Vulnerability Title
Inefficient Regular Expression Complexity in Loofah
Source: CVE Program / CVE List V5
Vulnerability Description
Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Loofah < 2.19.1 contains an inefficient regular expression that is susceptible to excessive backtracking when attempting to sanitize certain SVG attributes. This may lead to a denial of service through CPU resource consumption. This issue is patched in version 2.19.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1333
Source: CVE Program / CVE List V5
Vulnerability Title
Loofah gem for Ruby 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Loofah gem for Ruby是一款基于Ruby的、用于处理和转换HTML/XML文档的库。 Loofah gem for Ruby 2.19.1之前版本存在安全漏洞，该漏洞源于包含一个低效的正则表达式，在尝试清理某些 SVG 属性时容易受到过度回溯的影响， 这可能会因 CPU 资源消耗而导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
flavorjones loofah < 2.19.1 -

II. Public POCs for CVE-2022-23514

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III. Intelligence Information for CVE-2022-23514

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Vendor Advisories for CVE-2022-23514 (1)

Mailing List Discussions for CVE-2022-23514 (1)

Other References for CVE-2022-23514 (1)

Same Patch Batch · flavorjones · 2022-12-14 · 3 CVEs total

CVE-2022-23516 7.5 HIGH Uncontrolled Recursion in Loofah
CVE-2022-23515 6.1 MEDIUM Improper neutralization of data URIs may allow XSS in Loofah

IV. Related Vulnerabilities

Same product: loofah
Same vendor: flavorjones
Same weakness: CWE-1333

V. Comments for CVE-2022-23514

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