From 983e696bd6c77d06c79599b98185ed91c5ed62db Mon Sep 17 00:00:00 2001
From: OniriCorpe <oniricorpe@disroot.org>
Date: Mon, 28 Mar 2022 13:37:16 +0200
Subject: [PATCH] [feature/security] Add systemd sandboxing options to harden
 security (#440)

---
 example/gotosocial.service | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/example/gotosocial.service b/example/gotosocial.service
index 9bc06afb5..9d35847b9 100644
--- a/example/gotosocial.service
+++ b/example/gotosocial.service
@@ -17,6 +17,39 @@ Restart=on-failure
 ExecStart=/gotosocial/gotosocial --config-path config.yaml server start
 WorkingDirectory=/gotosocial
 
+StandardOutput=append:/var/log/gotosocial/gotosocial.log
+StandardError=inherit
+
+
+# Sandboxing options to harden security
+# Details for these options: https://www.freedesktop.org/software/systemd/man/systemd.exec.html
+NoNewPrivileges=yes
+PrivateTmp=yes
+PrivateDevices=yes
+RestrictAddressFamilies=AF_UNIX AF_INET AF_INET6
+RestrictNamespaces=yes
+RestrictRealtime=yes
+DevicePolicy=closed
+ProtectSystem=full
+ProtectControlGroups=yes
+ProtectKernelModules=yes
+ProtectKernelTunables=yes
+LockPersonality=yes
+SystemCallFilter=~@clock @debug @module @mount @obsolete @reboot @setuid @swap
+
+# Denying access to capabilities that should not be relevant
+# Doc: https://man7.org/linux/man-pages/man7/capabilities.7.html
+CapabilityBoundingSet=~CAP_RAWIO CAP_MKNOD
+CapabilityBoundingSet=~CAP_AUDIT_CONTROL CAP_AUDIT_READ CAP_AUDIT_WRITE
+CapabilityBoundingSet=~CAP_SYS_BOOT CAP_SYS_TIME CAP_SYS_MODULE CAP_SYS_PACCT
+CapabilityBoundingSet=~CAP_LEASE CAP_LINUX_IMMUTABLE CAP_IPC_LOCK
+CapabilityBoundingSet=~CAP_BLOCK_SUSPEND CAP_WAKE_ALARM
+CapabilityBoundingSet=~CAP_SYS_TTY_CONFIG
+CapabilityBoundingSet=~CAP_MAC_ADMIN CAP_MAC_OVERRIDE
+CapabilityBoundingSet=~CAP_NET_ADMIN CAP_NET_BROADCAST CAP_NET_RAW
+CapabilityBoundingSet=~CAP_SYS_ADMIN CAP_SYS_PTRACE CAP_SYSLOG 
+
+
 [Install]
 WantedBy=default.target