mirror of
https://github.com/ovh/debian-cis.git
synced 2025-08-04 22:31:16 +02:00
feat: add new scripts for debian 12
- tftp_is_disabled -> 2.1.16 - network_services_listening -> 2.1.22 - use_time_sync -> 2.3.1.1 Update the existing script to check there is only one installed - chrony_is_enabled_and_running -> 2.3.3.3
This commit is contained in:
Damien Cavagnini
committed by
damien cavagnini
damien cavagnini
parent
7c7730248e
commit
b0ca64f589
91
bin/hardening/chrony_is_enabled_and_running.sh
Executable file
91
bin/hardening/chrony_is_enabled_and_running.sh
Executable file
@@ -0,0 +1,91 @@
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#!/bin/bash
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# run-shellcheck
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#
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# CIS Debian Hardening
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#
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#
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# Ensure chrony is enabled and running (Automated)
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#
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set -e # One error, it's over
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set -u # One variable unset, it's over
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# shellcheck disable=2034
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HARDENING_LEVEL=3
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# shellcheck disable=2034
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DESCRIPTION="Ensure chrony is enabled and running."
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PACKAGE="chrony"
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SERVICE="chrony"
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# This function will be called if the script status is on enabled / audit mode
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audit() {
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CHRONY_INSTALLED=0
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CHRONY_ENABLED=0
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CHRONY_RUNNING=0
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is_pkg_installed "$PACKAGE"
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if [ "$FNRET" -ne 0 ]; then
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CHRONY_INSTALLED=1
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crit "$PACKAGE is not installed"
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fi
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# no package, no need to check further
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return
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is_service_enabled "$SERVICE"
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if [ "$FNRET" -ne 0 ]; then
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CHRONY_ENABLED=1
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crit "$SERVICE is not enabled"
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fi
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is_service_active "$SERVICE"
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if [ "$FNRET" -ne 0 ]; then
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CHRONY_RUNNING=1
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crit "$SERVICE is not running"
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fi
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}
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# This function will be called if the script status is on enabled mode
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apply() {
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audit
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if [ "$CHRONY_INSTALLED" -eq 1 ]; then
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warn "Please install $PACKAGE manually to ensure only one time synchronization system is installed"
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fi
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if [ "$CHRONY_ENABLED" -eq 1 ]; then
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info "Enabling $SERVICE service"
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manage_service "enable" "$SERVICE"
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fi
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if [ "$CHRONY_RUNNING" -eq 1 ]; then
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info "Starting $SERVICE service"
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manage_service "start" "$SERVICE"
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fi
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}
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# This function will check config parameters required
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check_config() {
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:
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}
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# Source Root Dir Parameter
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if [ -r /etc/default/cis-hardening ]; then
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# shellcheck source=../../debian/default
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. /etc/default/cis-hardening
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fi
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if [ -z "$CIS_LIB_DIR" ]; then
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echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
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echo "Cannot source CIS_LIB_DIR variable, aborting."
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exit 128
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fi
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# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
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if [ -r "${CIS_LIB_DIR}"/main.sh ]; then
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# shellcheck source=../../lib/main.sh
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. "${CIS_LIB_DIR}"/main.sh
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else
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echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_LIB_DIR in /etc/default/cis-hardening"
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exit 128
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fi
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86
bin/hardening/network_services_listening.sh
Executable file
86
bin/hardening/network_services_listening.sh
Executable file
@@ -0,0 +1,86 @@
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#!/bin/bash
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# run-shellcheck
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#
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# CIS Debian Hardening
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#
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#
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# Ensure only approved services are listening on a network interface (Manual)
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#
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set -e # One error, it's over
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set -u # One variable unset, it's over
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# shellcheck disable=2034
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HARDENING_LEVEL=3
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# shellcheck disable=2034
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DESCRIPTION="Ensure only approved services are listening on a network interface"
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# socket
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# ex: "127.0.0.1:123 0.0.0.0:123"
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# we only care about the socket, as there may be different process for a same service
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# ex: ntp or chrony for time synchronization
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EXCEPTIONS=""
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# This function will be called if the script status is on enabled / audit mode
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audit() {
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# shellcheck disable=2162
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while read i; do
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socket=$(echo "$i" | awk '{print $5}')
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proc=$(echo "$i" | awk '{print $7}' | awk -F ',' '{print $1}' | sed 's/users:((//')
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if [ -n "$socket" ]; then
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info -e "$proc listening on \t$socket"
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# output example :
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# "ntpd" listening on 127.0.0.1:123
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# "ntpd" listening on 0.0.0.0:123
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if grep -w "$socket" <<<"$EXCEPTIONS" >/dev/null; then
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debug "$socket" is an exception
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else
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crit "$socket" is not an exception
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fi
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fi
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done <<<"$($SUDO_CMD ss -plntuH)"
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}
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# This function will be called if the script status is on enabled mode
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apply() {
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info "This recommendation has to be reviewed and applied manually"
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}
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create_config() {
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# we try to put as default all services that should be running according to the CIS recommendation
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cat <<EOF
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status=audit
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# Put your custom configuration here
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EXCEPTIONS="127.0.0.1:123 0.0.0.0:123 0.0.0.0:22"
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EOF
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}
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# This function will check config parameters required
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check_config() {
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:
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}
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# Source Root Dir Parameter
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if [ -r /etc/default/cis-hardening ]; then
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# shellcheck source=../../debian/default
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. /etc/default/cis-hardening
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fi
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if [ -z "$CIS_LIB_DIR" ]; then
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echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
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echo "Cannot source CIS_LIB_DIR variable, aborting."
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exit 128
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fi
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# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
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if [ -r "${CIS_LIB_DIR}"/main.sh ]; then
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# shellcheck source=../../lib/main.sh
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. "${CIS_LIB_DIR}"/main.sh
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else
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echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_LIB_DIR in /etc/default/cis-hardening"
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exit 128
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fi
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91
bin/hardening/tftp_is_disabled.sh
Executable file
91
bin/hardening/tftp_is_disabled.sh
Executable file
@@ -0,0 +1,91 @@
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#!/bin/bash
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# run-shellcheck
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#
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# CIS Debian Hardening
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#
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#
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# Ensure tftp services are not in use (Automated)
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#
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set -e # One error, it's over
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set -u # One variable unset, it's over
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# shellcheck disable=2034
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HARDENING_LEVEL=3
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# shellcheck disable=2034
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DESCRIPTION="Ensure tftp services are not in use."
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PACKAGE='tftpd-hpa'
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SERVICE="tftpd-hpa.service"
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# 2 scenario here:
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# - tftp is a dependency for another package -> disable the service
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# - tftp is not a dependency for another package -> remove the package
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# This function will be called if the script status is on enabled / audit mode
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audit() {
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# 0 means true in bash
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PACKAGE_INSTALLED=1
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PACKAGE_IS_DEPENDENCY=1
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SERVICE_ENABLED=1
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is_pkg_installed "$PACKAGE"
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[ "$FNRET" = 0 ] && PACKAGE_INSTALLED=0 # 0 means true in bash
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is_pkg_a_dependency "$PACKAGE"
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# dnsmasq is installed with dnsmasq-base, which
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[ "$FNRET" = 0 ] && PACKAGE_IS_DEPENDENCY=0
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is_service_enabled "$SERVICE"
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[ "$FNRET" = 0 ] && SERVICE_ENABLED=0
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if [ "$PACKAGE_INSTALLED" -eq 0 ] && [ "$PACKAGE_IS_DEPENDENCY" -eq 1 ]; then
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crit "$PACKAGE is installed and not a dependency"
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elif [ "$PACKAGE_INSTALLED" -eq 0 ] && [ "$PACKAGE_IS_DEPENDENCY" -eq 0 ] && [ "$SERVICE_ENABLED" -eq 0 ]; then
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crit "$SERVICE is enabled"
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else
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ok "$PACKAGE is not in use"
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fi
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}
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# This function will be called if the script status is on enabled mode
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apply() {
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audit
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if [ "$PACKAGE_INSTALLED" -eq 0 ] && [ "$PACKAGE_IS_DEPENDENCY" -eq 1 ]; then
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crit "$PACKAGE is installed and not a dependency, removing it"
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apt_remove "$PACKAGE" -y
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apt-get autoremove -y
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elif [ "$PACKAGE_INSTALLED" -eq 0 ] && [ "$PACKAGE_IS_DEPENDENCY" -eq 0 ] && [ "$SERVICE_ENABLED" -eq 0 ] && [ "$IS_CONTAINER" -eq 1 ]; then
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crit "$SERVICE is enabled, i'm going to stop and mask it"
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systemctl stop "$SERVICE"
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systemctl mask "$SERVICE"
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else
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ok "$PACKAGE is not in use"
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fi
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}
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# This function will check config parameters required
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check_config() {
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:
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}
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# Source Root Dir Parameter
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if [ -r /etc/default/cis-hardening ]; then
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# shellcheck source=../../debian/default
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. /etc/default/cis-hardening
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fi
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if [ -z "$CIS_LIB_DIR" ]; then
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echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
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echo "Cannot source CIS_LIB_DIR variable, aborting."
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exit 128
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fi
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# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
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if [ -r "${CIS_LIB_DIR}"/main.sh ]; then
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# shellcheck source=../../lib/main.sh
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. "${CIS_LIB_DIR}"/main.sh
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else
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echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_LIB_DIR in /etc/default/cis-hardening"
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exit 128
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fi
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@@ -6,7 +6,7 @@
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#
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#
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# Ensure time synchronization is in use (Not Scored)
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# Ensure a single time synchronization daemon is in use (Automated)
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#
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set -e # One error, it's over
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@@ -15,28 +15,31 @@ set -u # One variable unset, it's over
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# shellcheck disable=2034
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HARDENING_LEVEL=3
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# shellcheck disable=2034
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DESCRIPTION="Ensure time synchronization is in use"
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DESCRIPTION="Ensure a single time synchronization is in use"
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PACKAGES="systemd-timesyncd ntp chrony"
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# This function will be called if the script status is on enabled / audit mode
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audit() {
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FOUND=false
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local count=0
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for PACKAGE in $PACKAGES; do
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is_pkg_installed "$PACKAGE"
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if [ "$FNRET" = 0 ]; then
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ok "Time synchronization is available through $PACKAGE"
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FOUND=true
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if [ "$FNRET" -eq 0 ]; then
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count=$(("$count" + 1))
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fi
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done
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if [ "$FOUND" = false ]; then
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if [ "$count" -eq 0 ]; then
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crit "None of the following time sync packages are installed: $PACKAGES"
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elif [ "$count" -gt 1 ]; then
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crit "Multiple time sync packages are installed, from $PACKAGES. Pick one and remove the others"
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else
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info "A single time sync package from $PACKAGES is installed"
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fi
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}
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# This function will be called if the script status is on enabled mode
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apply() {
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:
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info "This recommendation has to be reviewed and applied manually"
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}
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# This function will check config parameters required
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