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CVE-2022-23517— Inefficient Regular Expression Complexity in rails-html-sanitizer

Quick assessment

Affected
rails rails-html-sanitizer
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.

Rails是美国Rails团队的一套基于Ruby语言的开源Web应用框架。 Rails rails-html-sanitizer 1.4.4之前版本存在安全漏洞，该漏洞源于使用低效的正则表达式，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 1.52% · P74

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2022-23517

Vulnerability Information
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Vulnerability Title
Inefficient Regular Expression Complexity in rails-html-sanitizer
Source: CVE Program / CVE List V5
Vulnerability Description
rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. Certain configurations of rails-html-sanitizer < 1.4.4 use 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 has been patched in version 1.4.4.
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
Rails 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Rails是美国Rails团队的一套基于Ruby语言的开源Web应用框架。 Rails rails-html-sanitizer 1.4.4之前版本存在安全漏洞，该漏洞源于使用低效的正则表达式，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
rails rails-html-sanitizer < 1.4.4 -

II. Public POCs for CVE-2022-23517

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III. Intelligence Information for CVE-2022-23517

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Patches & Fixes for CVE-2022-23517 (1)

Vendor Advisories for CVE-2022-23517 (1)

Other References for CVE-2022-23517 (1)

Same Patch Batch · rails · 2022-12-14 · 4 CVEs total

CVE-2022-23519 7.2 HIGH Possible XSS vulnerability with certain configurations of rails-html-sanitizer
CVE-2022-23520 6.1 MEDIUM rails-html-sanitizer contains an incomplete fix for an XSS vulnerability
CVE-2022-23518 Improper neutralization of data URIs allows XSS in rails-html-sanitizer

IV. Related Vulnerabilities

Same product: rails-html-sanitizer
Same vendor: rails
Same weakness: CWE-1333

V. Comments for CVE-2022-23517

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