Cisco Security Advisory 20040113 – Multiple Cisco products contain vulnerabilities in the processing of H.323 messages, which are typically used in Voice over Internet Protocol (VoIP) or multimedia applications. All Cisco products running IOS software, Cisco CallManager versions 3.0 through 3.3, Cisco Conference Connection (CCC), Cisco Internet Service Node (ISN), Cisco BTS 10200 Softswitch, Cisco 7905 IP Phone H.323 Software Version 1.00, and Cisco ATA 18x series products running H.323/SIP loads with versions earlier than 2.16.1 are all susceptible to attack.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/32504/cisco-sa-20040113-h323.txt
Source: https://packetstormsecurity.com/files/32504/Cisco-Security-Advisory-20040113-h323.html