Secunia Security Advisory – Ubuntu has issued an update for ruby1.8. This fixes some vulnerabilities, which can be exploited by malicious people to disclose sensitive information, cause a DoS (Denial of Service), or potentially compromise a vulnerable system.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/67756/sa30867.txt
Source: https://packetstormsecurity.com/files/67756/Secunia-Security-Advisory-30867.html