On Wed, Jul 26, 2023 at 08:34:56PM +0000, 0x1eef wrote: > Hello, > > I was curious if there are plans to apply the "chicken bit" > workaround for the Ryzen line of processors. A firmware > update is not scheduled to be released until Nov or Dec > at the earliest. Thanks.
For those that would like to test if their systems are affected, this proof-of-concept was reported to work on at least one system: https://git.hardenedbsd.org/shawn.webb/zenbleed/-/tree/shawn.webb/bsd/main Building it depends on gmake and nasm. You'll want to be on the shawn.webb/bsd/main branch. Note that this code is simply Tavis' original PoC, just modified enough to get it to build on FreeBSD and OpenBSD. Thanks, -- Shawn Webb Cofounder / Security Engineer HardenedBSD https://git.hardenedbsd.org/hardenedbsd/pubkeys/-/raw/master/Shawn_Webb/03A4CBEBB82EA5A67D9F3853FF2E67A277F8E1FA.pub.asc
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