Cisco Intrusion Prevention System (IPS) Software on IPS NME devices before 7.0(9)E4 allows remote attackers to cause a denial of service (device reload) via malformed IPv4 packets that trigger incorrect memory allocation, aka Bug ID CSCua61977.
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130717-ips