V8.00.000.2025.06.17

Signed-off-by: Marc S. Weidner <msw@coresecret.dev>

func/cdi_4400_hardening/4445_hardening_logrotate.sh

@@ -0,0 +1,76 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-06-17; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.installer.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.installer
+# SPDX-Security-Contact: security@coresecret.eu
+
+guard_sourcing
+
+#######################################
+# Hardening logrotate.
+# Globals:
+#   TARGET
+# Arguments:
+#   None
+# Returns:
+#   0: on success
+#######################################
+hardening_logrotate() {
+  ### Declare Arrays, HashMaps, and Variables.
+  declare -ar  ary_logrotate=( "alternatives" "apt" "btmp" "chrony" "dpkg" "fail2ban" "rkhunter" "ufw" "unattended-upgrades" "usbguard")
+  declare      var_file="" var_log=""
+
+  rm -f           "${TARGET}/etc/logrotate.conf"
+  insert_header   "${TARGET}/etc/logrotate.conf"
+  insert_comments "${TARGET}/etc/logrotate.conf"
+  cat << EOF >>   "${TARGET}/etc/logrotate.conf"
+# See "man logrotate" for details. Global options do not affect preceding include directives.
+
+# rotate log files daily
+daily
+
+# keep 128 daily worth of backlogs
+rotate 128
+
+# hard cap: delete rotated logs older than 384 days
+maxage 384
+
+# create new (empty) log files after rotating old ones
+create
+
+# use date as a suffix of the rotated file
+dateext
+
+# gzip older rotations
+compress
+
+# keep the most recent rotation uncompressed for one cycle
+delaycompress
+
+# packages drop log rotation information into this directory
+include /etc/logrotate.d
+
+# system-specific logs may also be configured here.
+
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=conf
+EOF
+
+  for var_log in "${ary_logrotate[@]}"; do
+    var_file="${TARGET}/etc/logrotate.d/${var_log}"
+    [[ -e "${var_file}" ]] || continue
+    ### Replace leading 'monthly'/'weekly' directives with 'daily', preserving indentation and trailing comments.
+    sed -E -i \
+      -e 's/^([[:space:]]*)(monthly|weekly)([[:space:]]*)(#.*)?$/\1daily\3\4/' \
+      -e 's/^([[:space:]]*)rotate([[:space:]]+[0-9]+)?([[:space:]]*)(#.*)?$/\1rotate 128\3\4/' \
+      "${var_file}"
+  done
+
+  guard_dir && return 0
+}
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh