Cisco IOS 12.3 and 12.4 on Aironet access points allows remote attackers to cause a denial of service (radio-interface input-queue hang) via IAPP 0x3281 packets, aka Bug ID CSCtc12426.

Cisco 1200, 1131, and 1240 series Access Points, when operating in Lightweight Access Point Protocol (LWAPP) mode and controlled by 2000 and 4400 series Airespace WLAN controllers running 3.1.59.24, allow remote attackers to send unencrypted traffic to a secure network using frames with the MAC address of an authenticated end host.