The IKE implementation in Cisco IOS 12.2 through 12.4 on Cisco 7200 and 7301 routers with VAM2+ allows remote attackers to cause a denial of service (device reload) via a malformed IKE packet, aka Bug ID CSCtb13491.
The on-line help system options in Cisco routers allows non-privileged users without "enabled" access to obtain sensitive information via the show command.