GHSA-22f2-v57c-j9cx
Dashboard / Vulnerabilities / GHSA-22f2-v57c-j9cx
Summary: Rack vulnerable to ReDoS in content type parsing (2nd degree polynomial)
Details: ### Summary ```ruby module Rack class MediaType SPLIT_PATTERN = %r{\s*[;,]\s*} ``` The above regexp is subject to ReDos. 50K blank characters as a prefix to the header will take over 10s to split. ### PoC A simple HTTP request with lots of blank characters in the content-type header: ```ruby request["Content-Type"] = (" " * 50_000) + "a," ``` ### Impact It's a very easy to craft ReDoS. Like all ReDoS the impact is debatable.
References: https://github.com/rack/rack/security/advisories/GHSA-22f2-v57c-j9cx, https://nvd.nist.gov/vuln/detail/CVE-2024-25126, https://github.com/rack/rack/commit/6efb2ceea003c4b195815a614e00438cbd543462, https://github.com/rack/rack/commit/d9c163a443b8cadf4711d84bd2c58cb9ef89cf49, https://discuss.rubyonrails.org/t/denial-of-service-vulnerability-in-rack-content-type-parsing/84941, https://github.com/rack/rack, https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2024-25126.yml, https://lists.debian.org/debian-lts-announce/2024/04/msg00022.html, https://security.netapp.com/advisory/ntap-20240510-0005
Affected packages
Package
Name: rack
Purl: pkg:gem/rack
Affected ranges
Type: ECOSYSTEM
Events:
