CVE-2022-23514: Inefficient Regular Expression Complexity

December 14, 2022 (updated September 13, 2023)

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 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. This issue is patched in version 2.19.1.

References

github.com/advisories/GHSA-486f-hjj9-9vhh
github.com/flavorjones/loofah/commit/a6e0a1ab90675a17b1b2be189129d94139e4b143
github.com/flavorjones/loofah/security/advisories/GHSA-486f-hjj9-9vhh
hackerone.com/reports/1684163
nvd.nist.gov/vuln/detail/CVE-2022-23514

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