What’s Vulnerable › Vulnerabilities
CVE-2024-25126: Rack ReDos in content type parsing (2nd degree polynomial)
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 35.4% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2024-02-29 · updated 2026-06-17
- Weakness: CWE-1333
Description
Rack is a modular Ruby web server interface. Carefully crafted content type headers can cause Rack’s media type parser to take much longer than expected, leading to a possible denial of service vulnerability (ReDos 2nd degree polynomial). This vulnerability is patched in 3.0.9.1 and 2.2.8.1.
Affected products
- Debian Linux: 10.0
- rack: from 0.4 before 2.2.8.1; from 3.0.0 before 3.0.9.1 — fixed in 2.2.8.1, 3.0.9.1
- Rubygems Rack: from 3.0.0 before 3.0.9.1; from 0.4 before 2.2.8.1; 3.0.0, 3.0.1, 3.0.2, 3.0.3, 3.0.4, 3.0.4.1 (+112) — fixed in 3.0.9.1, 2.2.8.1
How to fix
Upgrade to a fixed version: rack 2.2.8.1, 3.0.9.1; Rubygems Rack 3.0.9.1, 2.2.8.1. Check the vendor advisory for mitigations.
References
- https://discuss.rubyonrails.org/t/denial-of-service-vulnerability-in-rack-content-type-parsing/84941
- https://github.com/rack/rack/commit/6efb2ceea003c4b195815a614e00438cbd543462
- https://github.com/rack/rack/commit/d9c163a443b8cadf4711d84bd2c58cb9ef89cf49
- https://github.com/rack/rack/security/advisories/GHSA-22f2-v57c-j9cx
- 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/
- https://discuss.rubyonrails.org/t/denial-of-service-vulnerability-in-rack-content-type-parsing/84941
- https://github.com/rack/rack/commit/6efb2ceea003c4b195815a614e00438cbd543462
- https://github.com/rack/rack/commit/d9c163a443b8cadf4711d84bd2c58cb9ef89cf49
- https://github.com/rack/rack/security/advisories/GHSA-22f2-v57c-j9cx
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2024-25126.yml
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