Comment by squarefoot

We're lucky that we can still catch some of them now. The current status of closed CPUs running proprietary firmware talking with closed chipsets running proprietary firmware blobs would make trivially easy to move the malware injection to the iron level for agencies funded by governments. Once they accomplish it, detecting their spyware using software, at any privilege level, will become impossible. I fear the scenario in which magic packets with a signature that turns off detection in network hardware (proprietary firmware) and interfaces (again, proprietary firmware) can directly instruct a system (proprietary firmware) unbeknownst to the user; it seems impossible today, however all it takes is having enough closed software and firmware so that a covert channel can be created from the CPU to the external world. Governments have enough funds and motivation to tell most network iron manufacturers to produce hardware according to some additional specifications.