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#!/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']
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(1)
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(0)
# differences between level 4,5 and others
if level >= 4:
set_user_umask('077')
set_shell_history_size(10)
allow_root_login(0)
allow_remote_root_login(0)
enable_sulogin(1)
allow_user_list(0)
enable_promisc_check(1)
accept_icmp_echo(0)
accept_broadcasted_icmp_echo(0)
accept_bogus_error_responses(0)
allow_reboot(0)
enable_at_crontab(0)
if level == 4:
password_aging(60, 30)
else:
password_aging(30, 15)
else:
set_user_umask('022')
set_shell_history_size(-1)
allow_root_login(1)
allow_remote_root_login(1)
enable_sulogin(0)
allow_user_list(1)
enable_promisc_check(0)
accept_icmp_echo(1)
accept_broadcasted_icmp_echo(1)
accept_bogus_error_responses(1)
allow_reboot(1)
enable_at_crontab(1)
password_aging(99999)
# differences between level 3,4,5 and others
if server:
allow_autologin(0)
enable_console_log(1)
if level == 5:
allow_issues(NONE)
else:
allow_issues(LOCAL)
enable_log_strange_packets(1)
else:
allow_autologin(1)
enable_console_log(0)
allow_issues(ALL)
enable_log_strange_packets(0)
# differences between level 0 and others
if level != 0:
enable_security_check(1)
enable_password(1)
if level < 3:
allow_x_connections(LOCAL)
allow_xserver_to_listen(1)
else:
if level == 3:
allow_x_connections(NONE)
allow_xserver_to_listen(1)
else:
allow_x_connections(NONE)
allow_xserver_to_listen(0)
else:
enable_security_check(0)
enable_password(0)
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_WRITEABLE' : ('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', ),
'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])
# 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)))
commit_changes()
interactive and log(_('Writing config files and then taking needed actions'))
ConfigFile.write_files()
closelog()
# msec.py ends here
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