Secunia Security Advisory – Debian has issued an update for ruby1.8. This fixes some vulnerabilities, which can be exploited by malicious people to bypass certain security restrictions or cause a DoS (Denial of Service).
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/70880/sa32256.txt
Source: https://packetstormsecurity.com/files/70880/Secunia-Security-Advisory-32256.html