Cisco ASR 5000 devices with software 19.0.M0.60828 allow remote attackers to cause a denial of service (OSPF process restart) via crafted length fields in headers of OSPF packets, aka Bug ID CSCuv62820.
http://www.securitytracker.com/id/1033355
http://tools.cisco.com/security/center/viewAlert.x?alertId=40585