3 ms·
> Depends on how you define "booting". As mentioned in one of the linked tweets, ME was possible to exploit through early-boot attacks before the HAP bit was e
by chithanh 2y ago
> Depends on how you define "booting".
As mentioned in one of the linked tweets, ME was possible to exploit through early-boot attacks before the HAP bit was even checked. So non-negligible things happen while it "boots".
- kukrimate 2y agoAbsolutely is, one of those exact attacks is being used here to bypass BootGaurd. However all pre-boot attacks I am aware of rely on writing a malicious payload to the system's SPI flash and involve physical access. While they are genuine vulernabilties, I wouldn't consider this a worse problem than being able to inject rootkits into other parts of the firmware which is also the case here.
- chithanh 2y agoIn my understanding, the concern is not what outside attackers can do. It is what capabilities exist under Intel's control before they are reduced to some hopefully benign subset. And the understanding that we have is mostly limited to what is in flash memory, e.g. the ME's BootROM hasn't been dumped yet (as far as I am aware).
- kukrimate 2y agoI have the ME11's boot ROM in a disassembler as I write this :)