/usr/share/pyshared/PreludeCorrelator/plugins/opensshauth.py is in prelude-correlator 1.0.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 | # Copyright (C) 2009 PreludeIDS Technologies. All Rights Reserved.
# Author: Sebastien Tricaud <stricaud@inl.fr>
# Author: Yoann Vandoorselaere <yoann.v@prelude-ids.com>
#
# This file is part of the Prelude-Correlator program.
#
# 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 2, 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; see the file COPYING. If not, write to
# the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
from PreludeCorrelator.pluginmanager import Plugin
from PreludeCorrelator.context import Context
def alert(ctx):
if len(ctx.authtype) > 1:
ctx.Set("alert.classification.text", "Multiple authentication methods")
ctx.Set("alert.correlation_alert.name", "Multiple authentication methods")
ctx.Set("alert.assessment.impact.severity", "medium")
ctx.Set("alert.assessment.impact.description", "Multiple ways of authenticating a single user have been found over SSH. If passphrase is the only allowed method, make sure you disable passwords.")
ctx.alert()
ctx.destroy()
class OpenSSHAuthPlugin(Plugin):
def run(self, idmef):
if idmef.Get("alert.analyzer(-1).manufacturer") != "OpenSSH":
return
if idmef.Get("alert.assessment.impact.completion") != "succeeded":
return
try:
idx = idmef.Get("alert.additional_data(*).meaning").index("Authentication method")
except:
return
data = idmef.Get("alert.additional_data(%d).data" % idx)
for username in idmef.Get("alert.target(*).user.user_id(*).name"):
for target in idmef.Get("alert.target(*).node.address(*).address"):
ctx = Context(("SSHAUTH", target, username), { "expire": 30, "alert_on_expire": alert }, update=True)
if ctx.getUpdateCount() == 0:
ctx.authtype = { data: True }
ctx.addAlertReference(idmef)
elif not ctx.authtype.has_key(data):
ctx.authtype[data] = True
ctx.addAlertReference(idmef)
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