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units: tighten system call filters a bit

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Take away kernel keyring access, CPU emulation system calls and various debug
system calls from the various daemons we have.
This commit is contained in:
Lennart Poettering 2016-06-10 18:00:12 +02:00
parent 1f9ac68b5b
commit 4e069746fe
10 changed files with 10 additions and 10 deletions
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2
units/systemd-hostnamed.service.in
View File

@ -21,4 +21,4 @@ PrivateNetwork=yes
ProtectSystem=yes
ProtectHome=yes
MemoryDenyWriteExecute=yes
SystemCallFilter=~@clock @module @mount @obsolete @raw-io ptrace
SystemCallFilter=~@clock @cpu-emulation @debug @keyring @module @mount @obsolete @raw-io

2
units/systemd-importd.service.in
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@ -18,4 +18,4 @@ NoNewPrivileges=yes
WatchdogSec=3min
KillMode=mixed
MemoryDenyWriteExecute=yes
SystemCallFilter=~@clock @module @mount @obsolete @raw-io ptrace
SystemCallFilter=~@clock @cpu-emulation @debug @keyring @module @mount @obsolete @raw-io

2
units/systemd-journald.service.in
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@ -25,7 +25,7 @@ CapabilityBoundingSet=CAP_SYS_ADMIN CAP_DAC_OVERRIDE CAP_SYS_PTRACE CAP_SYSLOG C
WatchdogSec=3min
FileDescriptorStoreMax=1024
MemoryDenyWriteExecute=yes
SystemCallFilter=~@clock @module @mount @obsolete @raw-io ptrace
SystemCallFilter=~@clock @cpu-emulation @debug @keyring @module @mount @obsolete @raw-io
# Increase the default a bit in order to allow many simultaneous
# services being run since we keep one fd open per service. Also, when

2
units/systemd-localed.service.in
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@ -21,4 +21,4 @@ PrivateNetwork=yes
ProtectSystem=yes
ProtectHome=yes
MemoryDenyWriteExecute=yes
SystemCallFilter=~@clock @module @mount @obsolete @privileged @raw-io ptrace
SystemCallFilter=~@clock @cpu-emulation @debug @keyring @module @mount @obsolete @raw-io

2
units/systemd-logind.service.in
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@ -26,7 +26,7 @@ BusName=org.freedesktop.login1
CapabilityBoundingSet=CAP_SYS_ADMIN CAP_MAC_ADMIN CAP_AUDIT_CONTROL CAP_CHOWN CAP_KILL CAP_DAC_READ_SEARCH CAP_DAC_OVERRIDE CAP_FOWNER CAP_SYS_TTY_CONFIG
WatchdogSec=3min
MemoryDenyWriteExecute=yes
SystemCallFilter=~@clock @module @mount @obsolete @raw-io ptrace
SystemCallFilter=~@clock @cpu-emulation @debug @keyring @module @obsolete @raw-io
# Increase the default a bit in order to allow many simultaneous
# logins since we keep one fd open per session.

2
units/systemd-machined.service.in
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@ -18,7 +18,7 @@ BusName=org.freedesktop.machine1
CapabilityBoundingSet=CAP_KILL CAP_SYS_PTRACE CAP_SYS_ADMIN CAP_SETGID CAP_SYS_CHROOT CAP_DAC_READ_SEARCH CAP_DAC_OVERRIDE CAP_CHOWN CAP_FOWNER CAP_FSETID CAP_MKNOD
WatchdogSec=3min
MemoryDenyWriteExecute=yes
SystemCallFilter=~@clock @module @mount @obsolete @raw-io ptrace
SystemCallFilter=~@clock @cpu-emulation @debug @keyring @module @mount @obsolete @raw-io
# Note that machined cannot be placed in a mount namespace, since it
# needs access to the host's mount namespace in order to implement the

2
units/systemd-networkd.service.m4.in
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@ -32,7 +32,7 @@ ProtectSystem=full
ProtectHome=yes
WatchdogSec=3min
MemoryDenyWriteExecute=yes
SystemCallFilter=~@clock @module @mount @obsolete @raw-io ptrace
SystemCallFilter=~@clock @cpu-emulation @debug @keyring @module @mount @obsolete @raw-io
[Install]
WantedBy=multi-user.target

2
units/systemd-resolved.service.m4.in
View File

@ -28,7 +28,7 @@ ProtectSystem=full
ProtectHome=yes
WatchdogSec=3min
MemoryDenyWriteExecute=yes
SystemCallFilter=~@clock @module @mount @obsolete @raw-io ptrace
SystemCallFilter=~@clock @cpu-emulation @debug @keyring @module @mount @obsolete @raw-io
[Install]
WantedBy=multi-user.target

2
units/systemd-timedated.service.in
View File

@ -19,4 +19,4 @@ PrivateTmp=yes
ProtectSystem=yes
ProtectHome=yes
MemoryDenyWriteExecute=yes
SystemCallFilter=~@module @mount @obsolete @raw-io ptrace
SystemCallFilter=~@cpu-emulation @debug @keyring @module @mount @obsolete @raw-io

2
units/systemd-timesyncd.service.in
View File

@ -29,7 +29,7 @@ ProtectSystem=full
ProtectHome=yes
WatchdogSec=3min
MemoryDenyWriteExecute=yes
SystemCallFilter=~@module @mount @obsolete @raw-io ptrace
SystemCallFilter=~@cpu-emulation @debug @keyring @module @mount @obsolete @raw-io
[Install]
WantedBy=sysinit.target