Memory leak in the Cisco Tunneling Control Protocol (cTCP) encapsulation feature in Cisco IOS 12.4, when an Easy VPN (aka EZVPN) server is enabled, allows remote attackers to cause a denial of service (memory consumption and device crash) via a sequence of TCP packets.
| Software | From | Fixed in |
|---|---|---|
| cisco / ios | 12.4t | 12.4t.x |
| cisco / ios | 12.4ya | 12.4ya.x |
| cisco / ios | 12.4xz | 12.4xz.x |