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
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
|
#!/usr/bin/python -O
#---------------------------------------------------------------
# Project : Mandrake Linux
# Module : msec/share
# File : msec.py
# Version : $Id$
# Author : Frederic Lepied
# Created On : Wed Dec 5 20:20:21 2001
#---------------------------------------------------------------
from mseclib import *
from Log import *
from Log import _name
import Config
import ConfigFile
import sys
import os
import string
import getopt
import gettext
import imp
try:
cat = gettext.Catalog('msec')
_ = cat.gettext
except IOError:
_ = str
# Eval a file
import mseclib
def import_only_mseclib(name, globals = None, locals = None, fromlist = None):
""" Import hook to allow only the mseclib module to be imported. """
if name == 'mseclib':
return mseclib
else:
raise ImportError, '%s cannot be imported' % name
def eval_file(name):
""" Eval level.local file. Only allow mseclib to be imported for
backward compatibility. """
globals = {}
locals = {}
builtins = {}
# Insert symbols from mseclib into globals
non_exported_names = ['FAKE', 'indirect', 'commit_changes', 'print_changes', 'get_translation']
for attrib_name in dir(mseclib):
if attrib_name[0] != '_' and attrib_name not in non_exported_names:
globals[attrib_name] = getattr(mseclib, attrib_name)
# Set import hook -- it needs to be in globals['__builtins'] so we make
# a copy of builtins to put there
builtins.update(__builtins__.__dict__)
builtins['__import__'] = import_only_mseclib
globals['__builtins__'] = builtins
# Exec file
execfile(os.path.expanduser(name), globals, locals)
# program
_name = 'msec'
sys.argv[0] = os.path.basename(sys.argv[0])
try:
(opt, args) = getopt.getopt(sys.argv[1:], 'o:',
['option'])
except getopt.error:
error(_('Invalid option. Use %s (-o var=<val>...) ([0-5])') % _name)
sys.exit(1)
for o in opt:
if o[0] == '-o' or o[0] == '--option':
pair = string.split(o[1], '=')
if len(pair) != 2:
error(_('Invalid option format %s %s: use -o var=<val>') % (o[0], o[1]))
sys.exit(1)
else:
Config.set_config(pair[0], pair[1])
interactive = sys.stdin.isatty()
set_interactive(interactive)
# initlog must be done after processing the option because we can change
# the way to report log with options...
if interactive:
import syslog
initlog('msec', syslog.LOG_LOCAL1)
else:
initlog('msec')
if len(args) == 0:
level = get_secure_level()
if level == None:
error(_('Secure level not set. Use %s <secure level> to set it.') % _name)
sys.exit(1)
else:
level = args[0]
changing_level()
try:
level = int(level)
except ValueError:
error(_('Invalid secure level %s. Use %s [0-5] to set it.') % (level, _name))
sys.exit(1)
if level < 0 or level > 5:
error(_('Invalid secure level %s. Use %s [0-5] to set it.') % (level, _name))
sys.exit(1)
interactive and log(_('### Program is starting ###'))
set_secure_level(level)
server=(level in range(3, 6))
# process options
server_level = Config.get_config('server_level')
if server_level:
set_server_level(server_level)
create_server_link()
# for all levels: min length = 2 * (level - 1) and for level 4,5 makes mandatory
# to have at least one upper case character and one digit.
if level > 1:
plength = (level - 1) * 2
else:
plength = 0
password_length(plength, level / 4, level / 4)
enable_ip_spoofing_protection(server)
enable_dns_spoofing_protection(server)
# differences between level 5 and others
if level == 5:
set_root_umask('077')
set_shell_timeout(900)
authorize_services(NONE)
enable_pam_wheel_for_su(yes)
password_history(5)
else:
set_root_umask('022')
if level == 4:
set_shell_timeout(3600)
authorize_services(LOCAL)
else:
set_shell_timeout(0)
authorize_services(ALL)
enable_pam_wheel_for_su(no)
password_history(0)
# differences between level 4,5 and others
if level >= 4:
set_user_umask('077')
set_shell_history_size(10)
allow_root_login(no)
enable_sulogin(yes)
allow_user_list(no)
enable_promisc_check(yes)
accept_icmp_echo(no)
accept_broadcasted_icmp_echo(no)
accept_bogus_error_responses(no)
allow_reboot(no)
enable_at_crontab(no)
if level == 4:
password_aging(60, 30)
allow_remote_root_login(without_password)
else:
password_aging(30, 15)
allow_remote_root_login(no)
else:
set_user_umask('022')
set_shell_history_size(-1)
allow_root_login(yes)
allow_remote_root_login(yes)
enable_sulogin(no)
allow_user_list(yes)
enable_promisc_check(no)
accept_icmp_echo(yes)
accept_broadcasted_icmp_echo(yes)
accept_bogus_error_responses(yes)
allow_reboot(yes)
enable_at_crontab(yes)
password_aging(99999)
# differences between level 3,4,5 and others
if server:
allow_autologin(no)
enable_console_log(yes)
if level == 5:
allow_issues(NONE)
else:
allow_issues(LOCAL)
enable_log_strange_packets(yes)
else:
allow_autologin(yes)
enable_console_log(no)
allow_issues(ALL)
enable_log_strange_packets(no)
# differences between level 0 and others
if level != 0:
enable_security_check(yes)
enable_password(yes)
if level < 3:
allow_x_connections(LOCAL)
allow_xserver_to_listen(yes)
else:
if level == 3:
allow_x_connections(NONE)
allow_xserver_to_listen(yes)
else:
allow_x_connections(NONE)
allow_xserver_to_listen(no)
else:
enable_security_check(no)
enable_password(no)
allow_x_connections(ALL, 1)
# msec cron
enable_msec_cron(1)
# 0 1 2 3 4 5
FILE_CHECKS = {'CHECK_SECURITY' : ('no', 'yes', 'yes', 'yes', 'yes', 'yes', ),
'CHECK_PERMS' : ('no', 'no', 'no', 'yes', 'yes', 'yes', ),
'CHECK_SUID_ROOT' : ('no', 'no', 'yes', 'yes', 'yes', 'yes', ),
'CHECK_SUID_MD5' : ('no', 'no', 'yes', 'yes', 'yes', 'yes', ),
'CHECK_SUID_GROUP' : ('no', 'no', 'yes', 'yes', 'yes', 'yes', ),
'CHECK_WRITABLE' : ('no', 'no', 'yes', 'yes', 'yes', 'yes', ),
'CHECK_UNOWNED' : ('no', 'no', 'no', 'no', 'yes', 'yes', ),
'CHECK_PROMISC' : ('no', 'no', 'no', 'no', 'yes', 'yes', ),
'CHECK_OPEN_PORT' : ('no', 'no', 'no', 'yes', 'yes', 'yes', ),
'CHECK_PASSWD' : ('no', 'no', 'no', 'yes', 'yes', 'yes', ),
'CHECK_SHADOW' : ('no', 'no', 'no', 'yes', 'yes', 'yes', ),
'TTY_WARN' : ('no', 'no', 'no', 'no', 'yes', 'yes', ),
'MAIL_WARN' : ('no', 'no', 'no', 'yes', 'yes', 'yes', ),
'MAIL_EMPTY_CONTENT':('no', 'no', 'no', 'no', 'yes', 'yes', ),
'SYSLOG_WARN' : ('no', 'no', 'yes', 'yes', 'yes', 'yes', ),
'RPM_CHECK' : ('no', 'no', 'no', 'yes', 'yes', 'yes', ),
'CHKROOTKIT_CHECK' : ('no', 'no', 'no', 'yes', 'yes', 'yes', ),
}
for k in FILE_CHECKS.keys():
set_security_conf(k, FILE_CHECKS[k][level])
if Config.get_config('nolocal', '0') == '0':
# load local customizations
CONFIG='/etc/security/msec/level.local'
if os.path.exists(CONFIG):
interactive and log(_('Reading local rules from %s') % CONFIG)
try:
eval_file(CONFIG)
except:
log(_('Error loading %s: %s') % (CONFIG, str(sys.exc_value)))
if Config.get_config('print', '0') == '1':
print_changes()
else:
commit_changes()
interactive and log(_('Writing config files and then taking needed actions'))
ConfigFile.write_files()
closelog()
# msec.py ends here
|
