Inefficient Regular Expression Complexity in Loofah
## 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).
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2022-23514US | high7.5 | — | ||
Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Loofah < 2.19.1 contains an inefficient regular expression… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/flavorjones/loofahPACKAGE
- https://github.com/flavorjones/loofah/commit/a6e0a1ab90675a17b1b2be189129d94139e4b143WEB
- https://github.com/flavorjones/loofah/security/advisories/GHSA-486f-hjj9-9vhhWEB
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/loofah/CVE-2022-23514.ymlWEB
- https://hackerone.com/reports/1684163WEB
- https://lists.debian.org/debian-lts-announce/2023/09/msg00011.htmlWEB
- https://lists.debian.org/debian-lts-announce/2024/09/msg00044.htmlWEB
- https://nvd.nist.gov/vuln/detail/CVE-2022-23514ADVISORY
Advisories like this name the exposed products attackers go after on your perimeter. See what is exposed on your perimeter with a free passive scan.
Free scan