Secunia Security Advisory – Ubuntu has issued an update for ruby1.9. This fixes multiple vulnerabilities and a weakness, which can be exploited by malicious people to cause a DoS (Denial of Service), compromise a vulnerable system, and manipulate certain data.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/86410/sa38586.txt
Source: https://packetstormsecurity.com/files/86410/Secunia-Security-Advisory-38586.html