high
7.5
CWE
1333
EPSS
0.045%
Advisory Published
Advisory Published
CVE Published
Updated

CVE-2024-25126: Rack ReDos in content type parsing (2nd degree polynomial)

First published: Fri Feb 23 2024(Updated: )

### 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.

Credit: security-advisories@github.com security-advisories@github.com

Affected SoftwareAffected VersionHow to fix
rubygems/rack>=0.4<2.2.8.1
2.2.8.1
rubygems/rack>=3.0.0<3.0.9.1
3.0.9.1
redhat/rubygem-rack<3.0.9.1
3.0.9.1
redhat/rubygem-rack<2.2.8.1
2.2.8.1
debian/ruby-rack
2.1.4-3+deb11u2
2.2.6.4-1+deb12u1
3.0.8-4
Rack>=0.4<2.2.8.1
Rack>=3.0.0<3.0.9.1
Debian=10.0

Remedy

https://github.com/rack/rack/commit/6efb2ceea003c4b195815a614e00438cbd543462

Remedy

https://github.com/rack/rack/commit/d9c163a443b8cadf4711d84bd2c58cb9ef89cf49

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2024-25126?

    CVE-2024-25126 has been classified as a medium severity vulnerability due to its potential to lead to Denial of Service attacks through ReDoS.

  • How do I fix CVE-2024-25126?

    To fix CVE-2024-25126, update the 'rack' package to version 2.2.8.1 or 3.0.9.1, depending on your current version.

  • Which versions of Rack are affected by CVE-2024-25126?

    The vulnerable versions of Rack range from 0.4 up to 2.2.8.1 and from 3.0.0 up to 3.0.9.1.

  • What kind of attack does CVE-2024-25126 enable?

    CVE-2024-25126 enables ReDoS (Regular Expression Denial of Service) attacks, which can significantly delay response times.

  • Are there specific platforms affected by CVE-2024-25126?

    Yes, CVE-2024-25126 affects installations of Rack on RubyGems, Red Hat, and Debian packages.

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