The BGP implementation in Cisco NX-OS 6.2(2a) and earlier does not properly handle the interaction of UPDATE messages with IPv6, VPNv4, and VPNv6 labeled unicast-address families, which allows remote attackers to cause a denial of service (peer reset) via a crafted message, aka Bug ID CSCuj03174.
https://exchange.xforce.ibmcloud.com/vulnerabilities/90119
http://www.securitytracker.com/id/1029568
http://www.securityfocus.com/bid/64670
http://tools.cisco.com/security/center/viewAlert.x?alertId=32325
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-6982