Secunia Security Advisory – Some vulnerabilities have been reported in Cisco PIX 500 Series, 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/86446/sa38636.txt
Source: https://packetstormsecurity.com/files/86446/Secunia-Security-Advisory-38636.html