IP Telephony pen-test and VLAN's

From: Frank Bussink (frank_bussink@hotmail.com)
Date: Tue May 16 2006 - 02:28:51 EDT


Hello,

I'm trying to do a pen-test on a Cisco IPT system.

Cisco IP telephone are connected on the same network cable as the PC, but
are working on another vlan.
The access switches have a configuration like :
switchport mode access
switchport access vlan 123
switchport voice vlan 124

I think the negotation with the access switch is done by CDP but I'm not
sure.

Does anyone have a tool that emulates the PC as a voice device in order to
receive a dhcp lease on vlan 124, so I can start to inject ARP MITM with
Cain for example ?

Kind regards
Frank

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