Ubuntu Security Notice 651-1 – A large amount of vulnerabilities have been addressed in Ruby. These issues include integer overflow, bypass, input validation, and various other vulnerabilities.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/70822/USN-651-1.txt
Source: https://packetstormsecurity.com/files/70822/Ubuntu-Security-Notice-651-1.html