Ubuntu 22.04 LTS: USN-5910-1 Critical: Rack Denial Of Service

The problem can be corrected by updating your system to the following package versions: Ubuntu 22.04 LTS:   ruby-rack                       2.1.4-5ubuntu1+esm3 Ubuntu 20.04 LTS:   ruby-rack                       2.0.7-2ubuntu0.1+esm3 Ubuntu 18.04 LTS:   ruby-rack                       1.6.4-4ubuntu0.2+esm4 Ubuntu 16.04 ESM:   ruby-rack                       1.6.4-3ubuntu0.2+esm4 Ubuntu 14.04 ESM:   ruby-rack                       1.5.2-3+deb8u3ubuntu1~esm6 After a standard system update you need to restart any applications using Rack to make all the necessary changes.