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this post was submitted on 10 Aug 2024
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Sinkclose
Impacted systems: https://www.amd.com/en/resources/product-security/bulletin/amd-sb-7014.html
Original presentation details. https://ioactive.com/event/def-con-talk-amd-sinkclose-universal-ring-2-privilege-escalation/
This is a big f****** deal. If you get kernel access to a system, which is not uncommon, you can install a persistent back door that subverts the rest of the system forever. That's huge. It does not require physical access, requires kernel access.. different things
Steam games that ask for admin privileges, a USB stick that boots, normal virus infection that can never be uninstalled,. persistent RAT....
Negative rings are a horrible proprietary liability.
That's been clear from their inception, and this changes nothing.