=========================================================================
Ubuntu Security Notice USN-7507-1
May 12, 2025

ruby-rack vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.04
- Ubuntu 24.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

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

Software Description:
- 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)

Update instructions:

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

Ubuntu 25.04
  ruby-rack                       2.2.7-1.1ubuntu0.25.04.1

Ubuntu 24.10
  ruby-rack                       2.2.7-1.1ubuntu0.2

Ubuntu 24.04 LTS
  ruby-rack                       2.2.7-1ubuntu0.3

Ubuntu 22.04 LTS
  ruby-rack                       2.1.4-5ubuntu1.1+esm2
                                  Available with Ubuntu Pro

Ubuntu 20.04 LTS
  ruby-rack                       2.0.7-2ubuntu0.1+esm7
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  ruby-rack                       1.6.4-4ubuntu0.2+esm8
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  ruby-rack                       1.6.4-3ubuntu0.2+esm8
                                  Available with Ubuntu Pro

Ubuntu 14.04 LTS
  ruby-rack                       1.5.2-3+deb8u3ubuntu1~esm10
                                  Available with Ubuntu Pro

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

References:
  https://ubuntu.com/security/notices/USN-7507-1
  CVE-2025-32441, CVE-2025-46727

Package Information:
  https://launchpad.net/ubuntu/+source/ruby-rack/2.2.7-1.1ubuntu0.25.04.1
  https://launchpad.net/ubuntu/+source/ruby-rack/2.2.7-1.1ubuntu0.2
  https://launchpad.net/ubuntu/+source/ruby-rack/2.2.7-1ubuntu0.3