USN-7507-1: Rack vulnerabilities

Publication date

12 May 2025

Overview

Rack could be made to crash or allow unintended access to network services.


Packages

  • ruby-rack - modular Ruby webserver interface

Details

It was discovered that Rack incorrectly handled deleted rack sessions. An
attacker could possibly use this issue to expose sensitive information or
to gain unauthorized access to user accounts. (CVE-2025-32441)

It was discovered that Rack incorrectly limited the number of parameters
in a web request. An attacker could possibly use this issue to cause a
denial of service. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04
LTS, Ubuntu 24.04 LTS, Ubuntu 24.10, and Ubuntu 25.04. (CVE-2025-46727)

It was discovered that Rack incorrectly handled deleted rack sessions. An
attacker could possibly use this issue to expose sensitive information or
to gain unauthorized access to user accounts. (CVE-2025-32441)

It was discovered that Rack incorrectly limited the number of parameters
in a web request. An attacker could possibly use this issue to cause a
denial of service. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04
LTS, Ubuntu 24.04 LTS, Ubuntu 24.10, and Ubuntu 25.04. (CVE-2025-46727)

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
25.04 plucky ruby-rack –  2.2.7-1.1ubuntu0.25.04.1
24.10 oracular ruby-rack –  2.2.7-1.1ubuntu0.2
24.04 noble ruby-rack –  2.2.7-1ubuntu0.3
22.04 jammy ruby-rack –  2.1.4-5ubuntu1.1+esm2  
20.04 focal ruby-rack –  2.0.7-2ubuntu0.1+esm7  
18.04 bionic ruby-rack –  1.6.4-4ubuntu0.2+esm8  
16.04 xenial ruby-rack –  1.6.4-3ubuntu0.2+esm8  
14.04 trusty ruby-rack –  1.5.2-3+deb8u3ubuntu1~esm10  

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