blob: 1fa9a9d750bec38e017b9cafd6306253364759f1 (
plain)
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
|
#!/bin/bash
#
# Security level implementation...
# Writen by Vandoorselaere Yoann <yoann@mandrakesoft.com>
#
if [[ -f /usr/share/msec/lib.sh ]]; then
. /usr/share/msec/lib.sh
else
echo "Can't find /usr/share/msec/lib.sh, exiting."
exit 1
fi
echo -e "Changing attribute of /var/log/* to append only...\n"
# All events logged on tty12
echo "Loging all messages on tty12 : "
AddRules "*.* /dev/tty12" /etc/syslog.conf
# Prevent all kind of connection
echo "Denying all kind of connection : "
AddRules "ALL:ALL:DENY" /etc/hosts.deny
# No login as root
echo "Login as root is denied : "
echo "Modified file : /etc/securetty..."
echo -e "done.\n\n"
# Security check
echo "Updating file check variable : "
echo -e "\t- Check security : yes."
AddRules "CHECK_SECURITY=yes" /etc/security/msec/security.conf quiet
echo -e "\t- Check important permissions : yes."
AddRules "CHECK_PERMS=yes" /etc/security/msec/security.conf quiet
echo -e "\t- Check suid root file : yes."
AddRules "CHECK_SUID_ROOT=yes" /etc/security/msec/security.conf quiet
echo -e "\t- Check suid root file integrity (backdoor check) : yes."
AddRules "CHECK_SUID_MD5=yes" /etc/security/msec/security.conf quiet
echo -e "\t- Check suid group file : yes."
AddRules "CHECK_SUID_GROUP=yes" /etc/security/msec/security.conf quiet
echo -e "\t- Check world writable file : yes."
AddRules "CHECK_WRITEABLE=yes" /etc/security/msec/security.conf quiet
echo -e "\t- Check unowned file : yes."
AddRules "CHECK_UNOWNED=yes" /etc/security/msec/security.conf quiet
echo -e "\t- Check promiscuous mode : yes."
AddRules "CHECK_PROMISC=yes" /etc/security/msec/security.conf quiet
echo -e "\t- Check listening port : yes."
AddRules "CHECK_OPEN_PORT=yes" /etc/security/msec/security.conf quiet
echo -e "\t- Check passwd file integrity : yes."
AddRules "CHECK_PASSWD=yes" /etc/security/msec/security.conf quiet
echo -e "\t- Check shadow file integrity : yes."
AddRules "CHECK_SHADOW=yes" /etc/security/msec/security.conf quiet
echo -e "\t- Security warning on tty : yes."
AddRules "TTY_WARN=yes" /etc/security/msec/security.conf quiet
echo -e "\t- Security warning by mail : yes."
AddRules "MAIL_WARN=yes" /etc/security/msec/security.conf quiet
AddRules "MAIL_USER=root" /etc/security/msec/security.conf quiet
echo -e "\t- Security warning in syslog : yes."
AddRules "SYSLOG_WARN=yes" /etc/security/msec/security.conf
# end security check
################ Crontab things ###################
# Check every 1 minutes for promisc problem
echo "Adding promisc check in crontab (scheduled every minutes) :"
AddRules "*/1 * * * * root /usr/share/msec/promisc_check.sh" /etc/crontab
echo "Adding \"diff\" & \"global\" security check in crontab (scheduled every midnight) :"
AddRules "0 4 * * * root /usr/share/msec/security.sh" /etc/crontab
###################################################
# setup BSD accounting.
echo "Setting up BSD process accounting..."
if [[ -f /sbin/accton ]]; then
AddRules "touch /var/log/security/pacct.log" /etc/rc.d/rc.local
AddRules "/sbin/accton /var/log/security/pacct.log" /etc/rc.d/rc.local
AddRules "/var/log/security/pacct.log {" /etc/logrotate.conf
AddRules " postrotate" /etc/logrotate.conf
AddRules " /sbin/accton /var/log/security/pacct.log" /etc/logrotate.conf
AddRules " }" /etc/logrotate.conf
touch /var/log/security/pacct.log
chown root.root /var/log/security/pacct.log
chmod 600 /var/log/security/pacct.log
/sbin/accton /var/log/security/pacct.log
fi
# Wanna password ?
LoaderUpdate;
# Disable all server :
export SECURE_LEVEL=4
echo "Setting secure level variable to 5 :"
AddRules "SECURE_LEVEL=5" /etc/sysconfig/msec
IFS="
"
export SECURE_LEVEL=5
echo -n "Disabling all service, except : {"
for service in `chkconfig --list | awk '{print $1}'`; do
if grep -qx ${service} /etc/security/msec/server.5; then
echo -n " ${service}"
fi
done
echo " } : "
for service in `chkconfig --list | awk '{print $1}'`; do
chkconfig --del "${service}"
if ! chkconfig --msec --add "${service}"; then
echo -e "\t- Services ${service} scheduled to be disabled at next boot."
fi
done
echo -e "done.\n";
echo "Setting umask to 077 (u=rw) :"
AddRules "UMASK_ROOT=077" /etc/sysconfig/msec
AddRules "UMASK_USER=077" /etc/sysconfig/msec
if [[ -f /lib/libsafe.so.2 ]]; then
echo "Enabling stack overflow protection :"
AddRules "/lib/libsafe.so.2" /etc/ld.so.preload
fi
# Do not boot on a shell
ForbidReboot
ForbidAutologin
echo
echo "You are now running your system in security level 5,"
echo "All services are disabled : try the chkconfig to enable one..."
echo "If you're on a senssible machine, ( which is probably the case )"
echo "you should compile the server from the sources".
echo
echo "In order to launch X in this security level,"
echo "you need to add your user to the \"xgrp\" group..."
echo "Use : usermod -G xgrp username"
echo
# Group were modified in lib.sh...
grpconv
ForbidUserList
RootSshLogin 5
|
