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Uncontrolled Recursion in Loofah

High severity GitHub Reviewed Published Dec 13, 2022 in flavorjones/loofah • Updated Sep 14, 2023

Package

bundler loofah (RubyGems)

Affected versions

>= 2.2.0, < 2.19.1

Patched versions

2.19.1

Description

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

References

@flavorjones flavorjones published to flavorjones/loofah Dec 13, 2022
Published to the GitHub Advisory Database Dec 13, 2022
Reviewed Dec 13, 2022
Published by the National Vulnerability Database Dec 14, 2022
Last updated Sep 14, 2023

Severity

High
7.5
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses

CVE ID

CVE-2022-23516

GHSA ID

GHSA-3x8r-x6xp-q4vm

Source code

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