Cisco Security Advisory – The Cisco VPN 3000 series concentrators are a family of purpose-built, remote access Virtual Private Network (VPN) platforms for data encryption and authentication. A malicious user may be able to send a crafted attack via SSL (Secure Sockets Layer) to the concentrators which may cause the device to reload, and/or drop user connections.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/36905/cisco-sa-20050330-vpn3k.txt
Source: https://packetstormsecurity.com/files/36905/Cisco-Security-Advisory-20050330-vpn3k.html