templates/systemd/mastodon: enable sandbox mode (#15937)

dist/mastodon-sidekiq.service

@@ -12,6 +12,33 @@ Environment="MALLOC_ARENA_MAX=2"
 ExecStart=/home/mastodon/.rbenv/shims/bundle exec sidekiq -c 25
 TimeoutSec=15
 Restart=always
+# Capabilities
+CapabilityBoundingSet=
+# Security
+NoNewPrivileges=true
+# Sandboxing
+ProtectSystem=strict
+PrivateTmp=true
+PrivateDevices=true
+PrivateUsers=true
+ProtectHostname=true
+ProtectKernelLogs=true
+ProtectKernelModules=true
+ProtectKernelTunables=true
+ProtectControlGroups=true
+RestrictAddressFamilies=AF_INET
+RestrictAddressFamilies=AF_INET6
+RestrictAddressFamilies=AF_NETLINK
+RestrictAddressFamilies=AF_UNIX
+RestrictNamespaces=true
+LockPersonality=true
+RestrictRealtime=true
+RestrictSUIDSGID=true
+PrivateMounts=true
+ProtectClock=true
+# System Call Filtering
+SystemCallArchitectures=native
+SystemCallFilter=~@clock @cpu-emulation @debug @keyring @module @mount @obsolete @reboot @resources @setuid @swap
 
 [Install]
 WantedBy=multi-user.target

dist/mastodon-streaming.service

@@ -12,6 +12,33 @@ Environment="STREAMING_CLUSTER_NUM=1"
 ExecStart=/usr/bin/node ./streaming
 TimeoutSec=15
 Restart=always
+# Capabilities
+CapabilityBoundingSet=
+# Security
+NoNewPrivileges=true
+# Sandboxing
+ProtectSystem=strict
+PrivateTmp=true
+PrivateDevices=true
+PrivateUsers=true
+ProtectHostname=true
+ProtectKernelLogs=true
+ProtectKernelModules=true
+ProtectKernelTunables=true
+ProtectControlGroups=true
+RestrictAddressFamilies=AF_INET
+RestrictAddressFamilies=AF_INET6
+RestrictAddressFamilies=AF_NETLINK
+RestrictAddressFamilies=AF_UNIX
+RestrictNamespaces=true
+LockPersonality=true
+RestrictRealtime=true
+RestrictSUIDSGID=true
+PrivateMounts=true
+ProtectClock=true
+# System Call Filtering
+SystemCallArchitectures=native
+SystemCallFilter=~@clock @cpu-emulation @debug @keyring @module @mount @obsolete @reboot @resources @setuid @swap
 
 [Install]
 WantedBy=multi-user.target

dist/mastodon-web.service

@@ -12,6 +12,33 @@ ExecStart=/home/mastodon/.rbenv/shims/bundle exec puma -C config/puma.rb
 ExecReload=/bin/kill -SIGUSR1 $MAINPID
 TimeoutSec=15
 Restart=always
+# Capabilities
+CapabilityBoundingSet=
+# Security
+NoNewPrivileges=true
+# Sandboxing
+ProtectSystem=strict
+PrivateTmp=true
+PrivateDevices=true
+PrivateUsers=true
+ProtectHostname=true
+ProtectKernelLogs=true
+ProtectKernelModules=true
+ProtectKernelTunables=true
+ProtectControlGroups=true
+RestrictAddressFamilies=AF_INET
+RestrictAddressFamilies=AF_INET6
+RestrictAddressFamilies=AF_NETLINK
+RestrictAddressFamilies=AF_UNIX
+RestrictNamespaces=true
+LockPersonality=true
+RestrictRealtime=true
+RestrictSUIDSGID=true
+PrivateMounts=true
+ProtectClock=true
+# System Call Filtering
+SystemCallArchitectures=native
+SystemCallFilter=~@clock @cpu-emulation @debug @keyring @module @mount @obsolete @reboot @resources @setuid @swap
 
 [Install]
 WantedBy=multi-user.target