Responder/servers/SNMP.py
Stephen Shkardoon 9d4f919b39
Implement a basic SNMP listener
All community strings are logged as they are sent to the server.
This initial implementation only supports SNMPv1 and SNMPv2c.

`pyasn1` is required for this server to function.
2022-11-06 01:27:28 +13:00

50 lines
1.8 KiB
Python
Executable file

#!/usr/bin/env python
# This file is part of Responder, a network take-over set of tools
# created and maintained by Laurent Gaffie.
# email: laurent.gaffie@gmail.com
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
from utils import *
if settings.Config.PY2OR3 == "PY3":
from socketserver import BaseRequestHandler
else:
from SocketServer import BaseRequestHandler
from pyasn1.codec.der.decoder import decode
class SNMP(BaseRequestHandler):
def handle(self):
data = self.request[0]
received_record, rest_of_substrate = decode(data)
snmp_version = int(received_record['field-0'])
if snmp_version > 1:
# TODO: Add support for SNMPv3 (which will have a field-0 value of 2)
print(text("[SNMP] Unsupported SNMPv3 request received from %s" % self.client_address[0].replace("::ffff:","")))
return
community_string = str(received_record['field-1'])
SaveToDb(
{
"module": "SNMP",
"type": "Cleartext",
"client": self.client_address[0],
"user": community_string,
"cleartext": community_string,
"fullhash": community_string,
}
)