Cisco IOS 12.0 through 12.4 on Cisco 10000, uBR10012 and uBR7200 series devices handles external UDP packets that are sent to 127.0.0.0/8 addresses intended for IPC communication within the device, which allows remote attackers to cause a denial of service (device or linecard reload) via crafted UDP packets, a different vulnerability than CVE-2008-3806.
http://www.vupen.com/english/advisories/2008/2670
http://www.cisco.com/en/US/products/products_security_advisory09186a0080a014ae.shtml
http://tools.cisco.com/security/center/viewAlert.x?alertId=16646