units: enable MemoryDenyWriteExecute (#3459)

Secure daemons shipped by systemd by enabling MemoryDenyWriteExecute.

Closes: #3459

10 files changed, 10 insertions, 0 deletions

diff --git a/units/systemd-hostnamed.service.in b/units/systemd-hostnamed.service.in
index b7079e4a7c..fc43b2c4a6 100644
--- a/units/systemd-hostnamed.service.in
+++ b/units/systemd-hostnamed.service.in
@@ -20,3 +20,4 @@ PrivateDevices=yes
 PrivateNetwork=yes
 ProtectSystem=yes
 ProtectHome=yes
+MemoryDenyWriteExecute=yes
diff --git a/units/systemd-importd.service.in b/units/systemd-importd.service.in
index b74ad72cdc..2f8138e88e 100644
--- a/units/systemd-importd.service.in
+++ b/units/systemd-importd.service.in
@@ -17,3 +17,4 @@ CapabilityBoundingSet=CAP_CHOWN CAP_FOWNER CAP_FSETID CAP_MKNOD CAP_SETFCAP CAP_
 NoNewPrivileges=yes
 WatchdogSec=3min
 KillMode=mixed
+MemoryDenyWriteExecute=yes
diff --git a/units/systemd-journald.service.in b/units/systemd-journald.service.in
index 41bfde5be3..06abe04861 100644
--- a/units/systemd-journald.service.in
+++ b/units/systemd-journald.service.in
@@ -24,6 +24,7 @@ StandardOutput=null
 CapabilityBoundingSet=CAP_SYS_ADMIN CAP_DAC_OVERRIDE CAP_SYS_PTRACE CAP_SYSLOG CAP_AUDIT_CONTROL CAP_AUDIT_READ CAP_CHOWN CAP_DAC_READ_SEARCH CAP_FOWNER CAP_SETUID CAP_SETGID CAP_MAC_OVERRIDE
 WatchdogSec=3min
 FileDescriptorStoreMax=1024
+MemoryDenyWriteExecute=yes
 
 # Increase the default a bit in order to allow many simultaneous
 # services being run since we keep one fd open per service. Also, when
diff --git a/units/systemd-localed.service.in b/units/systemd-localed.service.in
index 9b13f901a3..743221472c 100644
--- a/units/systemd-localed.service.in
+++ b/units/systemd-localed.service.in
@@ -20,3 +20,4 @@ PrivateDevices=yes
 PrivateNetwork=yes
 ProtectSystem=yes
 ProtectHome=yes
+MemoryDenyWriteExecute=yes
diff --git a/units/systemd-logind.service.in b/units/systemd-logind.service.in
index ff049134ee..67e2c34482 100644
--- a/units/systemd-logind.service.in
+++ b/units/systemd-logind.service.in
@@ -25,6 +25,7 @@ RestartSec=0
 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
 
 # Increase the default a bit in order to allow many simultaneous
 # logins since we keep one fd open per session.
diff --git a/units/systemd-machined.service.in b/units/systemd-machined.service.in
index 685baab21d..1517068ecd 100644
--- a/units/systemd-machined.service.in
+++ b/units/systemd-machined.service.in
@@ -17,6 +17,7 @@ ExecStart=@rootlibexecdir@/systemd-machined
 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
 
 # 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
diff --git a/units/systemd-networkd.service.m4.in b/units/systemd-networkd.service.m4.in
index 27d4d58962..3c9970fa48 100644
--- a/units/systemd-networkd.service.m4.in
+++ b/units/systemd-networkd.service.m4.in
@@ -31,6 +31,7 @@ CapabilityBoundingSet=CAP_NET_ADMIN CAP_NET_BIND_SERVICE CAP_NET_BROADCAST CAP_N
 ProtectSystem=full
 ProtectHome=yes
 WatchdogSec=3min
+MemoryDenyWriteExecute=yes
 
 [Install]
 WantedBy=multi-user.target
diff --git a/units/systemd-resolved.service.m4.in b/units/systemd-resolved.service.m4.in
index 8e1c1dea79..07c7658bcc 100644
--- a/units/systemd-resolved.service.m4.in
+++ b/units/systemd-resolved.service.m4.in
@@ -27,6 +27,7 @@ CapabilityBoundingSet=CAP_SETUID CAP_SETGID CAP_SETPCAP CAP_CHOWN CAP_DAC_OVERRI
 ProtectSystem=full
 ProtectHome=yes
 WatchdogSec=3min
+MemoryDenyWriteExecute=yes
 
 [Install]
 WantedBy=multi-user.target
diff --git a/units/systemd-timedated.service.in b/units/systemd-timedated.service.in
index 0c9599db20..3636091472 100644
--- a/units/systemd-timedated.service.in
+++ b/units/systemd-timedated.service.in
@@ -18,3 +18,4 @@ WatchdogSec=3min
 PrivateTmp=yes
 ProtectSystem=yes
 ProtectHome=yes
+MemoryDenyWriteExecute=yes
diff --git a/units/systemd-timesyncd.service.in b/units/systemd-timesyncd.service.in
index a856dad709..caf1dc132f 100644
--- a/units/systemd-timesyncd.service.in
+++ b/units/systemd-timesyncd.service.in
@@ -28,6 +28,7 @@ PrivateDevices=yes
 ProtectSystem=full
 ProtectHome=yes
 WatchdogSec=3min
+MemoryDenyWriteExecute=yes
 
 [Install]
 WantedBy=sysinit.target