tacacsd in Cisco IOS XR 5.1 and earlier allows remote attackers to cause a denial of service (process reload) via a malformed TACACS+ packet, aka Bug ID CSCum00468.
secunia.com/advisories/59632
secunia.com/advisories/59649
tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2014-3378
tools.cisco.com/security/center/viewAlert.x?alertId=35775
www.securityfocus.com/bid/69957
www.securitytracker.com/id/1030878
exchange.xforce.ibmcloud.com/vulnerabilities/96067