Unspecified vulnerability in Cisco IOS 12.2 and 12.4, when SSLVPN sessions, SSH sessions, or IKE encrypted nonces are enabled, allows remote attackers to cause a denial of service (device reload) via a crafted encrypted packet, aka Bug ID CSCsq24002.
http://www.vupen.com/english/advisories/2009/2759
http://www.securitytracker.com/id?1022930
http://www.cisco.com/en/US/products/products_security_advisory09186a0080af811c.shtml
http://tools.cisco.com/security/center/viewAlert.x?alertId=18892