feat: official Debian 11 compatibility (#176)

Introduce Debian 11 compatibility Based on CIS_Debian_Linux_11_Benchmark_v1.0.0 After review, here are the notable changes : - Harden /var/log more (noexec,nodev,nosuid) - Harden /var/log/audit more (noexec,nodev,nosuid) - Harden /home more (nosuid) - Disable cramfs - Fix 5.3.4_acc_pam_sha512.sh - Deprecate Debian 9 and remove useless docker images NB : more audit log rules have been introduced and will be inserted in the checks later Fix #158
2025-06-24 11:34:35 +02:00 · 2023-05-02 14:16:19 +02:00
parent 05521d5961
commit 04457e7df2
29 changed files with 1168 additions and 62 deletions
--- a/bin/hardening/1.1.12.2_var_log_audit_nosuid.sh
+++ b/bin/hardening/1.1.12.2_var_log_audit_nosuid.sh
@ -0,0 +1,92 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# CIS Debian Hardening
+#
+
+#
+# 1.1.12.2 Ensure nosuid option set on /var/log/audit partition (Scored)
+#
+
+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="/var/log/audit partition with nosuid option."
+
+# Quick factoring as many script use the same logic
+PARTITION="/var/log/audit"
+OPTION="nosuid"
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    info "Verifying that $PARTITION is a partition"
+    FNRET=0
+    is_a_partition "$PARTITION"
+    if [ "$FNRET" -gt 0 ]; then
+        crit "$PARTITION is not a partition"
+        FNRET=2
+    else
+        ok "$PARTITION is a partition"
+        has_mount_option "$PARTITION" "$OPTION"
+        if [ "$FNRET" -gt 0 ]; then
+            crit "$PARTITION has no option $OPTION in fstab!"
+            FNRET=1
+        else
+            ok "$PARTITION has $OPTION in fstab"
+            has_mounted_option "$PARTITION" "$OPTION"
+            if [ "$FNRET" -gt 0 ]; then
+                warn "$PARTITION is not mounted with $OPTION at runtime"
+                FNRET=3
+            else
+                ok "$PARTITION mounted with $OPTION"
+            fi
+        fi
+    fi
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    if [ "$FNRET" = 0 ]; then
+        ok "$PARTITION is correctly set"
+    elif [ "$FNRET" = 2 ]; then
+        crit "$PARTITION is not a partition, correct this by yourself, I cannot help you here"
+    elif [ "$FNRET" = 1 ]; then
+        info "Adding $OPTION to fstab"
+        add_option_to_fstab "$PARTITION" "$OPTION"
+        info "Remounting $PARTITION from fstab"
+        remount_partition "$PARTITION"
+    elif [ "$FNRET" = 3 ]; then
+        info "Remounting $PARTITION from fstab"
+        remount_partition "$PARTITION"
+    fi
+}
+
+# This function will check config parameters required
+check_config() {
+    # No param for this script
+    :
+}
+
+# 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