Inefficient Regular Expression Complexity in Loofah

高 7.5CVE-2022-23514 · GHSA-486f-hjj9-9vhh · 14/12/2022 公開 · 17/06/2026 更新

要点

CVE-2022-23514 は loofah, loofah (loofah project) 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）：1.8%（全脆弱性の 78.9% より高い）。
対処：2.19.1 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
loofah RubyGems	`< 2.19.1`	`2.19.1`
loofah loofah_project	`< 2.19.1`	`2.19.1`

概要

Summary

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.

Mitigation

Upgrade to Loofah >= 2.19.1.

Severity

The Loofah 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

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.