The Communication Server in Alcatel-Lucent OmniPCX Enterprise 7.1 and earlier caches an IP address during a TFTP request from an IP Touch phone, and uses this IP address as the destination for all subsequent VoIP packets to this phone, which allows remote attackers to cause a denial of service (loss of audio) or intercept voice communications via a crafted TFTP request containing the phone's MAC address in the filename.
https://exchange.xforce.ibmcloud.com/vulnerabilities/38560
http://www1.alcatel-lucent.com/psirt/statements/2007004/IPTouchDOS.pdf
http://www.vupen.com/english/advisories/2007/3919
http://www.securitytracker.com/id?1018983
http://www.securityfocus.com/bid/26494
http://www.securityfocus.com/archive/1/483925/100/0/threaded
http://securityreason.com/securityalert/3387