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Harden the security of the systemd services

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This commit is contained in:
ewilly 2023-03-06 22:28:57 +01:00
parent 325a131e15
commit 1dbed54860
2 changed files with 58 additions and 31 deletions
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45
conf/systemd-scrutiny-collector.service
View file

@ -14,26 +14,39 @@ Restart=no
StandardOutput=append:/var/log/__APP__/__APP__-collector.log StandardOutput=append:/var/log/__APP__/__APP__-collector.log
StandardError=inherit StandardError=inherit
NoNewPrivileges=true # Sandboxing options to harden security
SystemCallArchitectures=native # Depending on specificities of your service/app, you may need to tweak these
# .. but this should be a good baseline
# Details for these options: https://www.freedesktop.org/software/systemd/man/systemd.exec.html
NoNewPrivileges=yes
PrivateTmp=yes PrivateTmp=yes
ProtectHome=yes #PrivateDevices=yes
#ProtectSystem=strict RestrictAddressFamilies=AF_UNIX AF_INET AF_INET6 AF_NETLINK
ProtectKernelTunables=yes
ProtectKernelModules=yes
ProtectKernelLogs=yes
ProtectControlGroups=yes
ProtectHostname=yes
RestrictAddressFamilies=AF_INET AF_INET6
RestrictNamespaces=yes RestrictNamespaces=yes
LockPersonality=yes
MemoryDenyWriteExecute=yes
RestrictRealtime=yes RestrictRealtime=yes
RestrictSUIDSGID=yes #DevicePolicy=closed
RemoveIPC=yes #ProtectClock=yes # smartctl apparently doesn't function properly with this protection in place
ProtectHostname=yes
ProtectProc=invisible
ProtectSystem=full
ProtectControlGroups=yes
ProtectKernelModules=yes
ProtectKernelTunables=yes
LockPersonality=yes
SystemCallArchitectures=native
SystemCallFilter=~@clock @debug @module @mount @obsolete @reboot @setuid @swap @cpu-emulation @privileged
# smartctl apparently doesn't function properly with this protection in place # Denying access to capabilities that should not be relevant for webapps
#ProtectClock=yes # 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] [Install]
WantedBy=multi-user.target WantedBy=multi-user.target

44
conf/systemd-scrutiny-web-server.service
View file

@ -15,25 +15,39 @@ RestartSec=10s
StandardOutput=append:/var/log/__APP__/__APP__-web-server.log StandardOutput=append:/var/log/__APP__/__APP__-web-server.log
StandardError=inherit StandardError=inherit
# Sandboxing options to harden security
# Depending on specificities of your service/app, you may need to tweak these
# .. but this should be a good baseline
# Details for these options: https://www.freedesktop.org/software/systemd/man/systemd.exec.html
NoNewPrivileges=yes NoNewPrivileges=yes
ProtectHome=yes
#ProtectSystem=strict
PrivateTmp=yes PrivateTmp=yes
PrivateDevices=yes PrivateDevices=yes
ProtectKernelTunables=yes RestrictAddressFamilies=AF_UNIX AF_INET AF_INET6 AF_NETLINK
ProtectKernelModules=yes RestrictNamespaces=yes
ProtectKernelLogs=yes RestrictRealtime=yes
ProtectControlGroups=yes DevicePolicy=closed
ProtectHostname=yes
ProtectClock=yes ProtectClock=yes
RestrictAddressFamilies=AF_INET AF_INET6 ProtectHostname=yes
RestrictNamespaces=true ProtectProc=invisible
LockPersonality=true ProtectSystem=full
MemoryDenyWriteExecute=true ProtectControlGroups=yes
RestrictRealtime=true ProtectKernelModules=yes
RestrictSUIDSGID=true ProtectKernelTunables=yes
RemoveIPC=true LockPersonality=yes
CapabilityBoundingSet= SystemCallArchitectures=native
SystemCallFilter=~@clock @debug @module @mount @obsolete @reboot @setuid @swap @cpu-emulation @privileged
# Denying access to capabilities that should not be relevant for webapps
# 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] [Install]
WantedBy=multi-user.target WantedBy=multi-user.target