security: Verify session pid against DBus connection

diff --git a/tools/actions/container_manager.py b/tools/actions/container_manager.py
index e537e1843a7eb715d36ecbe004c3f44cc258fcde..5a6fe71b3e0641e4ff0740992d7b7b4949a66324 100644 (file)
--- a/tools/actions/container_manager.py
+++ b/tools/actions/container_manager.py
@@ -28,6 +28,9 @@ class DbusContainerManager(dbus.service.Object):
         uid = dbus_info.GetConnectionUnixUser(sender)
         if str(uid) not in ["0", session["user_id"]]:
             raise RuntimeError("Cannot start a session on behalf of another user")
+        pid = dbus_info.GetConnectionUnixProcessID(sender)
+        if str(uid) != "0" and str(pid) != session["pid"]:
+            raise RuntimeError("Invalid session pid")
         do_start(self.args, session)
 
     @dbus.service.method("id.waydro.ContainerManager", in_signature='b', out_signature='')