Uncontrolled Recursion in Loofah

CAO 7.5CVE-2022-23516 · GHSA-3x8r-x6xp-q4vm · Công bố 14/12/2022 · cập nhật 17/06/2026

Tóm tắt nhanh

CVE-2022-23516 là lỗ hổng mức CAO (CVSS 7.5) ảnh hưởng loofah, loofah (loofah project).
Xác suất bị khai thác trong 30 ngày tới (EPSS): 1.2%, cao hơn 67.4% các lỗ hổng khác.
Cách xử lý: cập nhật lên 2.19.1 hoặc mới hơn.

Gói / sản phẩm	Phiên bản bị ảnh hưởng	Phiên bản đã vá
loofah RubyGems	`≥ 2.2.0, < 2.19.1`	`2.19.1`
loofah loofah_project	`≥ 2.2.0, < 2.19.1`	`2.19.1`

Mô tả

Summary

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.

Mitigation

Upgrade to Loofah >= 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.

Severity

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

References

CWE - CWE-674: Uncontrolled Recursion (4.9)

Mô tả của NVD

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.