Cisco Wireless LAN Controller (WLC) devices with software 7.0 before 7.0.220.0, 7.1 before 7.1.91.0, and 7.2 before 7.2.103.0 allow remote attackers to cause a denial of service (Access Point reload) via crafted SIP packets, aka Bug ID CSCts87659.
http://www.securitytracker.com/id/1028027
http://www.securityfocus.com/bid/57524
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130123-wlc