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#!/bin/sh
################################################################################
# #
# Copyright (C) 2008-2014 LABBE Corentin <clabbe.montjoie@gmail.com>
#
# YASAT 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 3 of the License, or
# (at your option) any later version.
#
# YASAT 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 YASAT. If not, see <http://www.gnu.org/licenses/>.
# #
################################################################################
SSH_CONF_REP="${SCAN_ROOT}/etc/ssh/"
Title "Check ssh and sshd configurations"
if [ ! -e "$SSH_CONF_REP" ]; then
echo "strange no ssh directory"
return 1;
fi
TESTNAME='YASAT_TEST_SSH Disable and Remove OpenSSH Software'
Compliance --result 'NOTTESTED' --plugin ssh --nsag 3.5.1.1 --cce 4268-9 --cce 4272-1
TESTNAME='YASAT_TEST_SSH Remove SSH Server iptables Firewall Exception'
Compliance --result 'NOTTESTED' --plugin ssh --nsag 3.5.1.2 --cce 4295-2
TESTNAME='YASAT_TEST_SSH Limit Users SSH Access'
Compliance --result 'NOTTESTED' --plugin ssh --nsag 3.5.2.2
TESTNAME='YASAT_TEST_SSH Set Idle Timeout Interval for User Logins'
Compliance --result 'NOTTESTED' --plugin ssh --nsag 3.5.2.3 --cce 14061-6
TESTNAME='YASAT_TEST_SSH Enable a Warning Banner'
Compliance --result 'NOTIMPL' --plugin ssh --nsag 3.5.2.8 --cce 4431-3
TESTNAME='YASAT_TEST_SSH Do Not Allow Users to Set Environment Options'
Compliance --result 'NOTIMPL' --plugin ssh --nsag 3.5.2.9 --cce 14716-5
TESTNAME='YASAT_TEST_SSH Use Only Approved Ciphers in Counter Mode'
Compliance --result 'NOTIMPL' --plugin ssh --nsag 3.5.2.10 --cce 14491-5
TESTNAME='YASAT_TEST_SSH Strengthen Firewall Configuration if Possible'
Compliance --result 'NOTIMPL' --plugin ssh --nsag 3.5.2.11
#TODO not always /usr/sbin/sshd
check_file "${SCAN_ROOT}/usr/sbin/sshd" 2 BINARY
TESTNAME='YASAT_TEST_SSH_1 NSAG=3.5.2.6 CCEID=4387-7 PermitRootLogin must be set to no'
FindValueOf ${SSH_CONF_REP}/sshd_config PermitRootLogin JUSTTEST
check_value "$RESULTAT" 'no' 'false' 'PermitRootLogin' 'RED' 'SSH_ROOT_LOGIN' 3.5.2.6 4387-7
#if [ ! -z "$RESULTAT" ] ; then
# if [ "$RESULTAT" = "yes" ] ;then
# Display --indent 2 --text "PermitRootLogin" --result "$RESULTAT" --color RED --advice SSH_ROOT_LOGIN
# else
# Display --indent 2 --text "PermitRootLogin" --result "$RESULTAT" --color GREEN
# fi
#else
# Display --indent 2 --text "PermitRootLogin" --result NOTFOUND --color RED --advice SSH_ROOT_LOGIN
#fi
TESTNAME='YASAT_TEST_SSH_2 NSAG=3.5.2.7 CCEID=3660-8 PermitEmptyPassword must be set to no'
FindValueOf ${SSH_CONF_REP}/sshd_config PermitEmptyPassword JUSTTEST
check_value "$RESULTAT" 'no' 'false' 'PermitEmptyPassword' 'RED' 'TODO' 3.5.2.7 3660-8
#if [ ! -z "$RESULTAT" ] ; then
# if [ "$RESULTAT" = "no" ] ;then
# Display --indent 2 --text "PermitEmptyPassword" --result "$RESULTAT" --color RED
# else
# Display --indent 2 --text "PermitEmptyPassword" --result "$RESULTAT" --color GREEN
# fi
#else
# Display --indent 2 --text "PermitEmptyPassword" --result NOTFOUND --color GREEN
#fi
TESTNAME='YASAT_TEST_SSH_3 NSAG=3.5.2.5 CCEID=4370-3 HostbasedAuthentication must be set to no'
FindValueOf ${SSH_CONF_REP}/sshd_config HostbasedAuthentication JUSTTEST
check_value "$RESULTAT" 'no' 'false' 'HostbasedAuthentication' 'RED' 'TODO' 3.5.2.5 4370-3
#if [ ! -z "$RESULTAT" ] ;then
# if [ "$RESULTAT" = "yes" ] ;then
# Display --indent 2 --text "HostbasedAuthentication" --result "$RESULTAT" --color RED
# else
# Display --indent 2 --text "HostbasedAuthentication" --result "$RESULTAT" --color GREEN
# fi
#else
# Display --indent 2 --text "HostbasedAuthentication" --result NOTFOUND --color GREEN
#fi
#YASAT_TEST_SSH_4 RhostsAuthentication must be set to no
FindValueOf ${SSH_CONF_REP}/sshd_config RhostsAuthentication JUSTTEST
if [ ! -z "$RESULTAT" ] ;then
if [ "$RESULTAT" = "yes" ] ;then
Display --indent 2 --text "RhostsAuthentication" --result "$RESULTAT" --color RED
else
Display --indent 2 --text "RhostsAuthentication" --result "$RESULTAT" --color GREEN
fi
else
Display --indent 2 --text "RhostsAuthentication" --result NOTFOUND --color GREEN
fi
TESTNAME='YASAT_TEST_SSH_5 NSAG=3.5.2.1 CCEID=4325-7 Protocol must be set to 2'
FindValueOf ${SSH_CONF_REP}/sshd_config Protocol JUSTTEST
if [ ! -z "$RESULTAT" ] ;then
if [ "$RESULTAT" = "2" ] ;then
Display --indent 2 --text "Protocol" --result "$RESULTAT" --color GREEN
Compliance --result OK --plugin ssh --nsag 3.5.2.1 --cce 4325-7
else
Display --indent 2 --text "Protocol" --result "$RESULTAT" --color RED
Compliance --result NOK --plugin ssh --nsag 3.5.2.1 --cce 4325-7
fi
else
Display --indent 2 --text "Protocol" --result NOTFOUND --color GREEN
Compliance --result OK --plugin ssh --nsag 3.5.2.1 --cce 4325-7
fi
#YASAT_TEST_SSH_6 StrictModes must be set to yes
FindValueOf ${SSH_CONF_REP}/sshd_config StrictModes JUSTTEST
if [ ! -z "$RESULTAT" ] ; then
if [ "$RESULTAT" = "no" ] ; then
Display --indent 2 --text "StrictModes" --result "$RESULTAT" --color RED
else
Display --indent 2 --text "StrictModes" --result "$RESULTAT" --color GREEN
fi
else
Display --indent 2 --text "StrictModes" --result NOTFOUND --color GREEN
fi
#YASAT_TEST_SSH_7 UsePrivilegeSeparation must be set to yes
FindValueOf ${SSH_CONF_REP}/sshd_config UsePrivilegeSeparation JUSTTEST
if [ ! -z "$RESULTAT" ] ; then
if [ "$RESULTAT" = "no" ] ; then
Display --indent 2 --text "UsePrivilegeSeparation" --result "$RESULTAT" --color RED
else
Display --indent 2 --text "UsePrivilegeSeparation" --result "$RESULTAT" --color GREEN
fi
else
Display --indent 2 --text "UsePrivilegeSeparation" --result NOTFOUND --color GREEN
fi
#YASAT_TEST_SSH_8 X11Forwarding must be set to no
FindValueOf ${SSH_CONF_REP}/sshd_config X11Forwarding JUSTTEST
check_value "$RESULTAT" 'no' 'false' 'X11Forwarding' 'ORANGE' 'SSH_X11FORWARDING'
TESTNAME='YASAT_TEST_SSH_9 NSAG=3.5.2.4 CCEID=4475-0 IgnoreRhosts must be set to yes'
FindValueOf ${SSH_CONF_REP}/sshd_config IgnoreRhosts JUSTTEST
check_value "$RESULTAT" 'yes' 'false' 'IgnoreRhosts' 'RED' 'SSH_IGNORERHOSTS' 3.5.2.4 4475-0
#check HostKey
#grep ^HostKey "${SSH_CONF_REP}/sshd_config"
#YASAT_TEST_SSH_10 Check ssh_host_dsa_key permissions
if [ -e "${SSH_CONF_REP}"/ssh_host_dsa_key ] ; then
check_private_key "${SSH_CONF_REP}"/ssh_host_dsa_key 2 sshd
fi
#YASAT_TEST_SSH_11 Check ssh_host_dsa_key.pub permissions
if [ -e "${SSH_CONF_REP}"/ssh_host_dsa_key ] ; then
check_a_file "${SSH_CONF_REP}"/ssh_host_dsa_key.pub 2 root "$ROOTGROUP" 644
fi
#YASAT_TEST_SSH_12 Check ssh_host_rsa_key permissions and keysize
if [ -e "${SSH_CONF_REP}"/ssh_host_rsa_key ] ; then
check_private_key "${SSH_CONF_REP}"/ssh_host_rsa_key 2 sshd
fi
#YASAT_TEST_SSH_13 Check ssh_host_rsa_key.pub permissions
if [ -e "${SSH_CONF_REP}"/ssh_host_rsa_key ] ; then
check_a_file "${SSH_CONF_REP}"/ssh_host_rsa_key.pub 2 root "$ROOTGROUP" 644
fi
#YASAT_TEST_SSH_14 Check ssh_host_key permissions
if [ -e "${SSH_CONF_REP}"/ssh_host_key ] ; then
# check_a_file "${SSH_CONF_REP}"/ssh_host_key 2 root "$ROOTGROUP" 600
check_private_key "${SSH_CONF_REP}"/ssh_host_key 2 sshd
fi
#YASAT_TEST_SSH_15 Check ssh_host_key.pub permissions
if [ -e "${SSH_CONF_REP}"/ssh_host_key ] ; then
check_a_file "${SSH_CONF_REP}"/ssh_host_key.pub 2 root "$ROOTGROUP" 644
fi
#YASAT_TEST_SSH_16 Check sshd_config_key permissions
if [ -e "${SSH_CONF_REP}"/sshd_config ] ; then
check_a_file "${SSH_CONF_REP}"/sshd_config 2 root "$ROOTGROUP" 600
fi
#YASAT_TEST_SSH_17 Check sshd_config_key permissions
if [ -e "${SSH_CONF_REP}"/ssh_config ] ; then
check_a_file "${SSH_CONF_REP}"/ssh_config 2 root "$ROOTGROUP" 644
fi
return 0;
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