Re: IP Telephony pen-test and VLAN's

[Chris Serafin <chris () chrisserafin com>]

Well this is how I would start:

  * Most likely the Cisco Call Manager's AND Unity are on a windows
    platform, as Linux support is not out till 5.0, which I can't even
    get.
  * The 'supported' platform is windows 2000, and it will most likely
    be a win2000 box, so all the usual Windows 2000 exploits should
    work hopefully
  * The default location for Cisco CM web admin is :
    https://ipaddress/ccmadmin/
  * The default login/pass is : ccmadministrator/cisco
  * Check if RDP and VNC is available,  the prolly will be...remember 
    a realVNC exploit was just released, check metasploit.
  * Use VLAN hopping to get on the voice VLAN
  * Possibly use CDP packets to get your QoS DSCP markings through
  * Check the router/gateway and the switches for 'r00ting' them via
    old http exploits or mainly SNMP hacking
  * Sniff traffic for 'chatty' cisco protocols that give a bunch of
    info for enumeration/recon
  * Sniff VoIP RTP in windows with ethereal or Cain&Able
  * Sniff VoIP RTP in Linux via ethereal or VOMIT
  * Use routing protocols for recon or for re-routing
  * the normal arp spoofing for MITM


well that's just a start..........

I work exclusively in the Cisco IPT industry and I come from a security 
background so I would love to chat about this with you/the community:)

Chris Serafin
IT Security / Cisco VoIP Engineer
chris@chrisserafin[dot]com





Frank Bussink wrote:
> 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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This List Sponsored by: Cenzic

Concerned about Web Application Security? 
Why not go with the #1 solution - Cenzic, the only one to win the Analyst's 
Choice Award from eWeek. As attacks through web applications continue to rise, 
you need to proactively protect your applications from hackers. Cenzic has the 
most comprehensive solutions to meet your application security penetration 
testing and vulnerability management needs. You have an option to go with a 
managed service (Cenzic ClickToSecure) or an enterprise software 
(Cenzic Hailstorm). Download FREE whitepaper on how a managed service can 
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