CVE-2022-23516: Uncontrolled Recursion in Loofah
First published: Tue Dec 13 2022(Updated: )
## 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)
Credit: security-advisories@github.com security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Loofah Project Loofah | >=2.2.0<2.19.1 | |
| rubygems/loofah | >=2.2.0<2.19.1 | 2.19.1 |
| redhat/rubygem-loofah | <2.19.1 | 2.19.1 |
| redhat/rubygem-loofah | <0:2.19.1-1.el8 | 0:2.19.1-1.el8 |
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Reference Links
- https://github.com/flavorjones/loofah/security/advisories/GHSA-3x8r-x6xp-q4vm
- https://github.com/flavorjones/loofah/commit/86f7f6364491b0099d215db858ecdc0c89ded040
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/loofah/CVE-2022-23516.yml
- https://nvd.nist.gov/vuln/detail/CVE-2022-23516
- https://lists.debian.org/debian-lts-announce/2023/09/msg00011.html
- https://github.com/advisories/GHSA-3x8r-x6xp-q4vm (Advisory)
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2153242
- https://access.redhat.com/errata/RHSA-2023:2097
- https://access.redhat.com/security/cve/cve-2022-23516
- https://bugzilla.redhat.com/show_bug.cgi?id=2153241
- https://www.cve.org/CVERecord?id=CVE-2022-23516 https://nvd.nist.gov/vuln/detail/CVE-2022-23516 https://github.com/rubysec/ruby-advisory-db/blob/master/gems/loofah/CVE-2022-23516.yml
- collector/nvd-api
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- alias/CVE-2022-23516
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- package-manager/rubygems
- package-manager/redhat