Secunia Security Advisory – Cisco has acknowledged a security issue in Cisco Clean Access, which can be exploited by malicious users to bypass certain security restrictions.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/53424/sa23617.txt
Source: https://packetstormsecurity.com/files/53424/Secunia-Security-Advisory-23617.html