From b6fbd87328f8eabd82d65cc8f75dfb74341b0ace Mon Sep 17 00:00:00 2001
From: h7x4 <h7x4@nani.wtf>
Date: Fri, 28 Jul 2023 17:06:18 +0200
Subject: [PATCH]  nixos/atuin: harden systemd unit

---
 nixos/modules/services/misc/atuin.nix | 36 +++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/nixos/modules/services/misc/atuin.nix b/nixos/modules/services/misc/atuin.nix
index 8b6821ab8927..57ff02df7d68 100644
--- a/nixos/modules/services/misc/atuin.nix
+++ b/nixos/modules/services/misc/atuin.nix
@@ -91,6 +91,42 @@ in
         RuntimeDirectory = "atuin";
         RuntimeDirectoryMode = "0700";
         DynamicUser = true;
+
+        # Hardening
+        CapabilityBoundingSet = "";
+        LockPersonality = true;
+        NoNewPrivileges = true;
+        MemoryDenyWriteExecute = true;
+        PrivateDevices = true;
+        PrivateMounts = true;
+        PrivateTmp = true;
+        PrivateUsers = true;
+        ProcSubset = "pid";
+        ProtectClock = true;
+        ProtectControlGroups = true;
+        ProtectHome = true;
+        ProtectHostname = true;
+        ProtectKernelLogs = true;
+        ProtectKernelModules = true;
+        ProtectKernelTunables = true;
+        ProtectProc = "invisible";
+        ProtectSystem = "full";
+        RemoveIPC = true;
+        RestrictAddressFamilies = [
+          "AF_INET"
+          "AF_INET6"
+          # Required for connecting to database sockets,
+          "AF_UNIX"
+        ];
+        RestrictNamespaces = true;
+        RestrictRealtime = true;
+        RestrictSUIDSGID = true;
+        SystemCallArchitectures = "native";
+        SystemCallFilter = [
+          "@system-service"
+          "~@privileged"
+        ];
+        UMask = "0077";
       };
 
       environment = {