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nixos/libreddit: systemd unit hardening

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This commit is contained in:
Alexandre Iooss 2021-08-13 15:46:35 +02:00
parent 63e65bcf16
commit d68f731ba2
1 changed files with 25 additions and 0 deletions
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25
nixos/modules/services/misc/libreddit.nix
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@ -56,6 +56,31 @@ in
AmbientCapabilities = lib.mkIf (cfg.port < 1024) [ "CAP_NET_BIND_SERVICE" ];
Restart = "on-failure";
RestartSec = "2s";
# Hardening
CapabilityBoundingSet = if (cfg.port < 1024) then [ "CAP_NET_BIND_SERVICE" ] else [ "" ];
DeviceAllow = [ "" ];
LockPersonality = true;
MemoryDenyWriteExecute = true;
PrivateDevices = true;
# A private user cannot have process capabilities on the host's user
# namespace and thus CAP_NET_BIND_SERVICE has no effect.
PrivateUsers = (cfg.port >= 1024);
ProcSubset = "pid";
ProtectClock = true;
ProtectControlGroups = true;
ProtectHome = true;
ProtectHostname = true;
ProtectKernelLogs = true;
ProtectKernelModules = true;
ProtectKernelTunables = true;
ProtectProc = "invisible";
RestrictAddressFamilies = [ "AF_INET" "AF_INET6" ];
RestrictNamespaces = true;
RestrictRealtime = true;
RestrictSUIDSGID = true;
SystemCallArchitectures = "native";
SystemCallFilter = [ "@system-service" "~@privileged" "~@resources" ];
UMask = "0077";
};
};