Inefficient Regular Expression Complexity in rails-html-sanitizer

高 7.5CVE-2022-23517 · GHSA-5x79-w82f-gw8w · 14/12/2022 公開 · 17/06/2026 更新

要点

CVE-2022-23517 は rails-html-sanitizer, rails html sanitizers (rubyonrails) に影響する深刻度「高」 (CVSS 7.5) の脆弱性です。
今後30日間に悪用される確率（EPSS）：1.6%（全脆弱性の 75.5% より高い）。
対処：1.4.4 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
rails-html-sanitizer RubyGems	`< 1.4.4`	`1.4.4`
rails html sanitizers rubyonrails	`< 1.4.4`	`1.4.4`

概要

Summary

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.

Mitigation

Upgrade to rails-html-sanitizer >= 1.4.4.

Severity

The maintainers have evaluated this as High Severity 7.5 (CVSS3.1).

References

Credit

This vulnerability was responsibly reported by @ooooooo-q (https://github.com/ooooooo-q).

NVD の説明

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.