Cisco IOS 15.0 through 15.3 and IOS XE 3.2 through 3.8, when a VRF interface exists, allows remote attackers to cause a denial of service (interface queue wedge) via crafted UDP RSVP packets, aka Bug ID CSCuf17023.
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130925-rsvp