medium5.3
CVE-2024-25126
Rack vulnerable to ReDoS in content type parsing (2nd degree polynomial)
Impact
### 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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| rubygems | rack | >= 3.0.0, < 3.0.9.1 | 3.0.9.1 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Rack | Rack | from 0.4 before 2.2.8.1 from 3.0.0 before 3.0.9.1 |
| Debian | Debian Linux | Version 10.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- 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://github.com/advisories/GHSA-22f2-v57c-j9cx
- https://nvd.nist.gov/vuln/detail/CVE-2024-25126
- https://security.netapp.com/advisory/ntap-20240510-0005