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harden systemd services (RHEL-76760)

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Resolves: RHEL-76760
This commit is contained in:
Miroslav Lichvar 2025-01-30 16:31:28 +01:00
parent 97b9d322f2
commit c4396f9c5c
3 changed files with 79 additions and 0 deletions
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25
phc2sys.service
View File

@ -7,5 +7,30 @@ Type=simple
EnvironmentFile=-/etc/sysconfig/phc2sys
ExecStart=/usr/sbin/phc2sys $OPTIONS
CapabilityBoundingSet=CAP_SYS_TIME
DeviceAllow=char-pps rw
DeviceAllow=char-ptp rw
DevicePolicy=closed
LockPersonality=yes
MemoryDenyWriteExecute=yes
# This does not work with selinux
#NoNewPrivileges=yes
PrivateTmp=yes
ProtectControlGroups=yes
ProtectHome=yes
ProtectHostname=yes
ProtectKernelLogs=yes
ProtectKernelModules=yes
ProtectKernelTunables=yes
ProtectProc=invisible
ProtectSystem=strict
ReadWritePaths=/run
RestrictAddressFamilies=AF_UNIX
RestrictNamespaces=yes
RestrictSUIDSGID=yes
SystemCallArchitectures=native
SystemCallFilter=~@cpu-emulation @debug @module @mount @obsolete @raw-io
SystemCallFilter=~@reboot @resources @swap
[Install]
WantedBy=multi-user.target

26
ptp4l.service
View File

@ -8,5 +8,31 @@ Type=simple
EnvironmentFile=-/etc/sysconfig/ptp4l
ExecStart=/usr/sbin/ptp4l $OPTIONS
CapabilityBoundingSet=CAP_NET_ADMIN CAP_NET_BIND_SERVICE CAP_NET_RAW
CapabilityBoundingSet=CAP_SYS_ADMIN CAP_SYS_TIME
DeviceAllow=char-pps rw
DeviceAllow=char-ptp rw
DevicePolicy=closed
LockPersonality=yes
MemoryDenyWriteExecute=yes
# This does not work with selinux
#NoNewPrivileges=yes
PrivateTmp=yes
ProtectControlGroups=yes
ProtectHome=yes
ProtectHostname=yes
ProtectKernelLogs=yes
ProtectKernelModules=yes
ProtectKernelTunables=yes
ProtectProc=invisible
ProtectSystem=strict
ReadWritePaths=/run
RestrictAddressFamilies=AF_INET AF_INET6 AF_NETLINK AF_PACKET AF_UNIX
RestrictNamespaces=yes
RestrictSUIDSGID=yes
SystemCallArchitectures=native
SystemCallFilter=~@cpu-emulation @debug @module @mount @obsolete @raw-io
SystemCallFilter=~@reboot @resources @swap
[Install]
WantedBy=multi-user.target

28
timemaster.service
View File

@ -7,6 +7,34 @@ Wants=network-online.target
[Service]
Type=simple
ExecStart=/usr/sbin/timemaster -f /etc/timemaster.conf
RuntimeDirectory=timemaster
CapabilityBoundingSet=~CAP_AUDIT_CONTROL CAP_AUDIT_READ CAP_AUDIT_WRITE
CapabilityBoundingSet=~CAP_BLOCK_SUSPEND CAP_KILL CAP_LEASE CAP_LINUX_IMMUTABLE
CapabilityBoundingSet=~CAP_MAC_ADMIN CAP_MAC_OVERRIDE CAP_MKNOD
CapabilityBoundingSet=~CAP_SYS_BOOT CAP_SYS_CHROOT CAP_SYS_MODULE CAP_SYS_PACCT
CapabilityBoundingSet=~CAP_SYS_PTRACE CAP_SYS_RAWIO CAP_SYS_TTY_CONFIG CAP_WAKE_ALARM
DeviceAllow=char-pps rw
DeviceAllow=char-ptp rw
DeviceAllow=char-rtc rw
DevicePolicy=closed
LockPersonality=yes
MemoryDenyWriteExecute=yes
PrivateTmp=yes
ProtectControlGroups=yes
ProtectHome=yes
ProtectHostname=yes
ProtectKernelLogs=yes
ProtectKernelModules=yes
ProtectKernelTunables=yes
ProtectProc=invisible
ProtectSystem=strict
ReadWritePaths=/run/timemaster /var/lib/chrony -/var/log -/var/spool
RestrictAddressFamilies=AF_INET AF_INET6 AF_NETLINK AF_PACKET AF_UNIX
RestrictNamespaces=yes
RestrictSUIDSGID=yes
SystemCallArchitectures=native
SystemCallFilter=~@cpu-emulation @debug @module @mount @obsolete @raw-io @reboot @swap
[Install]
WantedBy=multi-user.target