mirror of
https://github.com/ovh/debian-cis.git
synced 2024-12-23 14:35:26 +01:00
99 lines
3.2 KiB
Bash
Executable File
99 lines
3.2 KiB
Bash
Executable File
#!/bin/bash
|
|
|
|
# run-shellcheck
|
|
#
|
|
# OVH Security audit
|
|
#
|
|
|
|
#
|
|
# 99.5.2.1 Ensure that sshd only allows authentication through public key.
|
|
#
|
|
|
|
set -e # One error, it's over
|
|
set -u # One variable unset, it's over
|
|
|
|
# shellcheck disable=2034
|
|
HARDENING_LEVEL=2
|
|
# shellcheck disable=2034
|
|
DESCRIPTION="Ensure that sshd only allows authentication through public key."
|
|
|
|
PACKAGE='openssh-server'
|
|
FILE='/etc/ssh/sshd_config'
|
|
OPTIONS='PubkeyAuthentication=yes PasswordAuthentication=no KbdInteractiveAuthentication=no KerberosAuthentication=no ChallengeResponseAuthentication=no HostbasedAuthentication=no GSSAPIAuthentication=no GSSAPIKeyExchange=no '
|
|
|
|
# This function will be called if the script status is on enabled / audit mode
|
|
audit() {
|
|
is_pkg_installed "$PACKAGE"
|
|
if [ "$FNRET" != 0 ]; then
|
|
ok "$PACKAGE is not installed!"
|
|
else
|
|
ok "$PACKAGE is installed"
|
|
for SSH_OPTION in $OPTIONS; do
|
|
SSH_PARAM=$(echo "$SSH_OPTION" | cut -d= -f 1)
|
|
SSH_VALUE=$(echo "$SSH_OPTION" | cut -d= -f 2)
|
|
PATTERN="^${SSH_PARAM}[[:space:]]+$SSH_VALUE"
|
|
does_pattern_exist_in_file_nocase "$FILE" "$PATTERN"
|
|
if [ "$FNRET" = 0 ]; then
|
|
ok "$PATTERN is present in $FILE"
|
|
else
|
|
crit "$PATTERN is not present in $FILE"
|
|
fi
|
|
done
|
|
fi
|
|
}
|
|
|
|
# This function will be called if the script status is on enabled mode
|
|
apply() {
|
|
is_pkg_installed "$PACKAGE"
|
|
if [ "$FNRET" = 0 ]; then
|
|
ok "$PACKAGE is installed"
|
|
else
|
|
crit "$PACKAGE is absent, installing it"
|
|
apt_install "$PACKAGE"
|
|
fi
|
|
for SSH_OPTION in $OPTIONS; do
|
|
SSH_PARAM=$(echo "$SSH_OPTION" | cut -d= -f 1)
|
|
SSH_VALUE=$(echo "$SSH_OPTION" | cut -d= -f 2)
|
|
PATTERN="^${SSH_PARAM}[[:space:]]+$SSH_VALUE"
|
|
does_pattern_exist_in_file_nocase $FILE "$PATTERN"
|
|
if [ "$FNRET" = 0 ]; then
|
|
ok "$PATTERN is present in $FILE"
|
|
else
|
|
warn "$PATTERN is not present in $FILE, adding it"
|
|
does_pattern_exist_in_file_nocase "$FILE" "^${SSH_PARAM}"
|
|
if [ "$FNRET" != 0 ]; then
|
|
add_end_of_file "$FILE" "$SSH_PARAM $SSH_VALUE"
|
|
else
|
|
info "Parameter $SSH_PARAM is present but with the wrong value -- Fixing"
|
|
replace_in_file $FILE "^${SSH_PARAM}[[:space:]]+.*" "$SSH_PARAM $SSH_VALUE"
|
|
fi
|
|
/etc/init.d/ssh reload >/dev/null 2>&1
|
|
fi
|
|
done
|
|
}
|
|
|
|
# This function will check config parameters required
|
|
check_config() {
|
|
:
|
|
}
|
|
|
|
# Source Root Dir Parameter
|
|
if [ -r /etc/default/cis-hardening ]; then
|
|
# shellcheck source=../../debian/default
|
|
. /etc/default/cis-hardening
|
|
fi
|
|
if [ -z "$CIS_ROOT_DIR" ]; then
|
|
echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
|
|
echo "Cannot source CIS_ROOT_DIR variable, aborting."
|
|
exit 128
|
|
fi
|
|
|
|
# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
|
|
if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
|
|
# shellcheck source=../../lib/main.sh
|
|
. "$CIS_ROOT_DIR"/lib/main.sh
|
|
else
|
|
echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
|
|
exit 128
|
|
fi
|