Cisco VPN 3000 series concentrators running software 4.7.0 through 4.7.2.A allow remote attackers to cause a denial of service (device reload or user disconnect) via a crafted HTTP packet.
https://exchange.xforce.ibmcloud.com/vulnerabilities/24330
http://www.vupen.com/english/advisories/2006/0346
http://www.securityfocus.com/bid/16394
http://www.cisco.com/warp/public/707/cisco-sa-20060126-vpn.shtml
http://securitytracker.com/id?1015546