M1 chips have undeniably revolutionized the way Apple designs its computers. The numbers are impressive, if only in terms of power to begin with: 2021’s iMac M1s are indeed 124% more powerful than the generation before them. But like any processor, these not infallible. Therefore, some technical technical issues have been reported, such as the macOS 11.4 bug that causes the SSD to wear out abnormally. And despite Apple’s reputation for this, M1 chips are not flawless.
Thus, a new vulnerability was discovered by two researchers, Jose Rodrigo Sanchez Vicarte and Michael Flanders, working at the University of Illinois and the University of Washington, respectively. baptized” Prophecy“This flaw works at the level of Data-Memory Dependent Prefetcher (DMP), a process that analyzes data stored in memory to predict which will be most useful during calculations. On paper, this system is very effective. improve flea rate.
Augury Flaw May Leak Data on M1 Chips
gold on chips M1, M1 Pro, M1 Max and A14, some of this data never reaches the kernel as they are not useful for future computations. According to the researchers, the process may therefore be at its root. data leak. Even more problematic, there is currently no really effective protection against this flaw. As the researchers explain, “Any defense based on tracking what data the kernel (speculative or otherwise) is accessing cannot protect against Augury because the leaked data is never read by the kernel.”.
However, the researchers note that this defect is absent. not as bad as it seems. Indeed, the process “related to the lowest DMP an attacker can get”. Additionally, the latter has not found any exploits of the bug at this time.so don’t worry. These results will allow Apple to make the necessary corrections to make its chips even more secure.
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