USN-4089-1: Rack vulnerability
7 August 2019
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
Rack could allow cross-site scripting (XSS) attacks.
- ruby-rack - modular Ruby webserver interface
It was discovered that Rack incorrectly handled carefully crafted requests. A remote attacker could use this issue to execute a cross-site scripting (XSS) attack.
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.