[OffTopic] A vulnerability postmortem on Network Security Services
pjmlp at progtools.org
Fri Dec 3 10:04:11 UTC 2021
On Friday, 3 December 2021 at 08:45:06 UTC, Ola Fosheim Grøstad
> On Friday, 3 December 2021 at 06:56:53 UTC, Paulo Pinto wrote:
>> That is how SPARC ADI, ARM MTE work.
>> Intel borked their MPX execution, so who knows if they will
>> come up with something up, given that iOS and Android are now
>> making use of hardware memory tagging.
> Where did you find info on iOS and Android shipping with memory
> According to the ARM MTE paper it adds 4 bits for every 16
> bytes and is probabilistic in nature, so it does not work with
> large offsets. It also forces 16 byte alignment of objects on
> the stack.
Read my previous comment,
On Android's case it is quite recent, only the models with
Armv8.5 have it turned on, for older CPUs there is a lightheight
version applied to critical components via HWASan.
And on iOS although Project Zero has find some flaws on PAC, they
have been fixing those issues.
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