feat: add new checks for debian12

systemd_timesyncd_is_enabled_and_running.sh	-> 2.3.2.2
rpcbind_is_disabled.sh				-> 2.1.12
ftp_client_not_installed.sh			-> 2.2.6
chrony_with_chrony_user.sh			-> 2.3.3.2
ipv6_is_enabled.sh				-> 3.1.1

bin/hardening/chrony_with_chrony_user.sh

@@ -0,0 +1,79 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# CIS Debian Hardening
+#
+
+#
+# Ensure chrony is running as user _chrony (Automated)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+# shellcheck disable=2034
+HARDENING_LEVEL=3
+# shellcheck disable=2034
+DESCRIPTION="Ensure chrony is running as user _chrony"
+FILE='/etc/chrony/chrony.conf'
+CHRONY_USER="_chrony"
+USER_PATTERN="^user"
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    CHRONY_USER_VALID=0
+
+    local running_user=""
+    running_user=$($SUDO_CMD ps -ef | awk '/[c]hronyd/ { print $1 }')
+    if [ -z "$running_user" ]; then
+        CHRONY_USER_VALID=1
+        crit "chrony is not running"
+    elif [[ "$running_user" != "$CHRONY_USER" ]]; then
+        CHRONY_USER_VALID=1
+        crit "chrony is running as root"
+    else
+        ok "chrony is running as $CHRONY_USER"
+    fi
+
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    audit
+
+    if [ "$CHRONY_USER_VALID" -ne 0 ]; then
+        does_pattern_exist_in_file "$FILE" "$USER_PATTERN"
+        if [ "$FNRET" -eq 0 ]; then
+            sed -i '/'$USER_PATTERN'/d' "$FILE"
+        fi
+
+        add_end_of_file "$FILE" "user $CHRONY_USER"
+        info "$FILE modified, please restart the service"
+    fi
+}
+
+# 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 "$CIS_LIB_DIR" ]; then
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "Cannot source CIS_LIB_DIR variable, aborting."
+    exit 128
+fi
+
+# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
+if [ -r "${CIS_LIB_DIR}"/main.sh ]; then
+    # shellcheck source=../../lib/main.sh
+    . "${CIS_LIB_DIR}"/main.sh
+else
+    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_LIB_DIR in /etc/default/cis-hardening"
+    exit 128
+fi