source: http://www.securityfocus.com/bid/26121/info

Macrovision SafeDisc is prone to a local privilege-escalation vulnerability because it fails to adequately sanitize user-supplied input.

Exploiting this vulnerability allows local attackers to execute arbitrary malicious code with SYSTEM-level privileges, facilitating the complete compromise of affected computers.

UPDATE: This issue affects only Microsoft Windows XP and 2003 platforms. Microsoft Vista is not affected. 

http://www.exploit-db.com/sploits/30680.zip