This is so much worse that the title makes it out to be: 1. Your OS installs malware (technically manufacturers software) from a 3rd party vendor in background, zero user interaction 2. Happens as soon as you or anyone with physical access plug in a device into the HDMI port 3. That malware has internet and full system access, no sandboxing 4. It starts with every system boot 5. This software gets installed when you…
The USB protocol does not have any authentication, just a VendorID/ProductID pair: 2×16 bits that Windows uses for looking up the driver package to install. Programming a MCU to use any VendorID/ProductID is straightforward. A USB device could even appear innocuous at first but after a timer or external trigger disconnect and reconnect masquerading as another device.
1. https://arstechnica.com/information-technology/2021/08/need-...