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#!/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 "Loging all messages on tty12 : "
AddRules "*.* /dev/tty12" /etc/syslog.conf
# login as root from the console allowed
echo "Login as root is allowed (on the console) : "
AddRules "tty1" /etc/securetty quiet
AddRules "tty2" /etc/securetty quiet
AddRules "tty3" /etc/securetty quiet
AddRules "tty4" /etc/securetty quiet
AddRules "tty5" /etc/securetty quiet
AddRules "tty6" /etc/securetty
AddRules "vc/1" /etc/securetty quiet
AddRules "vc/2" /etc/securetty quiet
AddRules "vc/3" /etc/securetty quiet
AddRules "vc/4" /etc/securetty quiet
AddRules "vc/5" /etc/securetty quiet
AddRules "vc/6" /etc/securetty
# 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 : no."
AddRules "CHECK_UNOWNED=no" /etc/security/msec/security.conf quiet
echo -e "\t- Check promiscuous mode : no."
AddRules "CHECK_PROMISC=no" /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=no" /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
echo "Adding permission check in crontab (scheduled every midnight) :"
AddRules "0 4 * * * root /usr/share/msec/security.sh" /etc/crontab
export SECURE_LEVEL=3
echo "Setting secure level variable to 3 :"
AddRules "SECURE_LEVEL=3" /etc/sysconfig/msec
echo "Setting umask to 022 (u=rw,g=r,o=r) :"
AddRules "UMASK_ROOT=022" /etc/sysconfig/msec
AddRules "UMASK_USER=022" /etc/sysconfig/msec
# icmp echo
echo "Enabling icmp echo :"
AddRules "net.ipv4.icmp_echo_ignore_all=0" /etc/sysctl.conf
AddRules "net.ipv4.icmp_echo_ignore_broadcasts=1" /etc/sysctl.conf
# bad error
echo "Enabling bad error message Protection :"
AddRules "net.ipv4.icmp_ignore_bogus_error_responses=1" /etc/sysctl.conf
# log strange packets
echo "Enabling logging Spoofed Packets, Source Routed Packets, Redirect Packets :"
AddRules "net.ipv4.conf.all.log_martians=1" /etc/sysctl.conf
LoadSysctl
# Do not boot on a shell
AllowReboot
ForbidAutologin
# Group were modified in lib.sh...
grpconv
AllowUserList
RootSshLogin 3
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