GHSA-3x8r-x6xp-q4vm

Uncontrolled Recursion in Loofah

Source: GitHub Advisory Database (reviewed) High CVE-2022-23516

Packages

Ecosystem	Package	Affected	Fixed in
RubyGems	loofah	>= 2.2.0, < 2.19.1	2.19.1

Details

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

## 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)](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-674: Uncontrolled Recursion (4.9)](https://cwe.mitre.org/data/definitions/674.html)

References

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