2022-07-26 18:09:49 -04:00
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#!/bin/bash
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2024-04-28 16:57:34 -04:00
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# Copyright (C) 2022-2024 Thien Tran
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2023-09-27 03:58:33 -04:00
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may not
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# use this file except in compliance with the License. You may obtain a copy of
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# the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations under
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# the License.
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2024-04-28 16:57:34 -04:00
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# Compliance
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systemctl mask debug-shell.service
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systemctl mask kdump.service
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2022-07-26 18:09:49 -04:00
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2024-04-28 16:57:34 -04:00
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# Setting umask to 077
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umask 077
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sed -i 's/umask 022/umask 077/g' /etc/bashrc
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echo 'umask 077' | tee -a /etc/bashrc
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2023-01-18 08:52:35 -05:00
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2024-04-28 16:57:34 -04:00
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# Disable timesyncd
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systemctl disable --now systemd-timesyncd
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systemctl mask systemd-timesyncd
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# Security kernel settings
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curl --proxy http://127.0.0.1:8082 https://raw.githubusercontent.com/Kicksecure/security-misc/master/etc/modprobe.d/30_security-misc.conf | tee /etc/modprobe.d/30_security-misc.conf
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chmod 644 /etc/modprobe.d/30_security-misc.conf
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sed -i 's/#install msr/install msr/g' /etc/modprobe.d/30_security-misc.conf
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curl --proxy http://127.0.0.1:8082 https://raw.githubusercontent.com/Kicksecure/security-misc/master/usr/lib/sysctl.d/990-security-misc.conf | tee /etc/sysctl.d/990-security-misc.conf
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chmod 644 /etc/sysctl.d/990-security-misc.conf
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sed -i 's/kernel.yama.ptrace_scope=2/kernel.yama.ptrace_scope=3/g' /etc/sysctl.d/990-security-misc.conf
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curl --proxy http://127.0.0.1:8082 https://raw.githubusercontent.com/Kicksecure/security-misc/master/usr/lib/sysctl.d/30_silent-kernel-printk.conf | tee /etc/sysctl.d/30_silent-kernel-printk.conf
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chmod 644 /etc/sysctl.d/30_silent-kernel-printk.conf
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curl --proxy http://127.0.0.1:8082 https://raw.githubusercontent.com/Kicksecure/security-misc/master/usr/lib/sysctl.d/30_security-misc_kexec-disable.conf | tee /etc/sysctl.d/30_security-misc_kexec-disable.conf
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chmod 644 /etc/sysctl.d/30_security-misc_kexec-disable.conf
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# Dracut doesn't seem to work - need to investigate
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# dracut -f
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sysctl -p
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# Harden SSH
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curl --proxy http://127.0.0.1:8082 https://raw.githubusercontent.com/TommyTran732/Linux-Setup-Scripts/main/etc/ssh/ssh_config.d/10-custom.conf | tee /etc/ssh/ssh_config.d/10-custom.conf
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2024-04-28 17:16:43 -04:00
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chmod 644 /etc/ssh/ssh_config.d/10-custom.conf
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# Setup hardened_malloc
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dnf install 'https://divested.dev/rpm/fedora/divested-release-20231210-2.noarch.rpm' -y
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sed -i 's/^metalink=.*/&?protocol=https/g' /etc/yum.repos.d/divested-release.repo
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dnf config-manager --save --setopt=divested.includepkgs=divested-release,real-ucode,microcode_ctl,amd-ucode-firmware,hardened_malloc
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dnf install hardened_malloc -y
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echo 'libhardened_malloc.so' | sudo tee /etc/ld.so.preload
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