#!/bin/bash
# SPDX-Version: 3.0
# SPDX-CreationInfo: 2025-10-11; WEIDNER, Marc S.; <msw@coresecret.dev>
# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.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: LicenseRef-CNCL-1.1 OR LicenseRef-CCLA-1.1
# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
# SPDX-PackageName: CISS.debian.live.builder
# SPDX-Security-Contact: security@coresecret.eu
set -Ceuo pipefail

printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"

mkdir -p /etc/systemd/system/clamav-daemon.service.d
cat << 'EOF' >| /etc/systemd/system/clamav-daemon.service.d/override.conf
[Service]
User=clamav
Group=clamav
ProtectSystem=full
ProtectHome=read-only
PrivateTmp=yes
NoNewPrivileges=yes
PermissionsStartOnly=true
ExecStartPre=/bin/mkdir -p /run/clamav
ExecStartPre=/bin/chown clamav:clamav /run/clamav
ExecStartPre=/bin/chmod 750 /run/clamav

ReadOnlyPaths=/
ReadWritePaths=/var/lib/clamav /var/log/clamav /var/run/clamav /run/clamav

MemoryDenyWriteExecute=yes
#MemoryLimit=4096M
#CPUShares=512

RestrictAddressFamilies=AF_INET AF_INET6
RestrictNamespaces=yes
RestrictRealtime=yes
SystemCallFilter=@system-service
CapabilityBoundingSet=CAP_NET_BIND_SERVICE CAP_SYS_NICE

EOF
chmod 0644 /etc/systemd/system/clamav-daemon.service.d/override.conf

mkdir -p /etc/systemd/system/clamav-freshclam.service.d
cat << 'EOF' >| /etc/systemd/system/clamav-freshclam.service.d/override.conf
[Service]
User=clamav
Group=clamav
ProtectSystem=full
ProtectHome=read-only
PrivateTmp=yes
NoNewPrivileges=yes

ReadOnlyPaths=/
ReadWritePaths=/var/lib/clamav /var/log/clamav /var/run/clamav

MemoryDenyWriteExecute=yes
#MemoryLimit=4096M
#CPUShares=512

RestrictAddressFamilies=AF_INET AF_INET6
RestrictNamespaces=yes
RestrictRealtime=yes
SystemCallFilter=@system-service
CapabilityBoundingSet=CAP_NET_BIND_SERVICE CAP_SYS_NICE

EOF
chmod 0644 /etc/systemd/system/clamav-freshclam.service.d/override.conf

printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"

exit 0
# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh