GHSA-486f-hjj9-9vhh

Inefficient Regular Expression Complexity in Loofah

Source: GitHub Advisory Database (reviewed) High CVE-2022-23514

Packages

Ecosystem	Package	Affected	Fixed in
RubyGems	loofah	< 2.19.1	2.19.1

Details

As written in the advisory (Markdown source, shown as plain text).

## 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)](https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). ## References - [CWE - CWE-1333: Inefficient Regular Expression Complexity (4.9)](https://cwe.mitre.org/data/definitions/1333.html) - https://hackerone.com/reports/1684163 ## Credit This vulnerability was responsibly reported by @ooooooo-q (https://github.com/ooooooo-q).

References

External links from the advisory. They lead to third-party sites.