MIT researchers have developed a new attack that exploits hardware on Apple's M1, bypassing the last line of defense for many software bugs.
Researchers at MIT’s Computer Science and Artificial Intelligence Laboratory have discovered a new security vulnerability that targets Apple’s popular M1 processor. The attack, dubbed PACMAN, is capable of bypassing the last line of defense against software bugs on the M1 and potentially other ARM-based processors.
“The idea behind pointer authentication is that if all else has failed, you still can rely on it to prevent attackers from gaining control of your system,” Ravichandran, who co-wrote the PACMAN report, said. “We’ve shown that pointer authentication as a last line of defense isn’t as absolute as we once thought it was.”
Ravichandran told Digital Trends in an interview that it only targeted the M1, informing Apple of the issue in 2021. He says “the concerning question is not whether the current ARM processors are vulnerable, but whether future ARM processors are also vulnerable.” We reached out to ARM, which says it’s aware of the vulnerability and plans to publish an update on the ARM Security Center Developer site once its investigation is over.
Apple doesn’t seem too concerned, and neither do MIT’s researchers. Ravichandran says that, although pointer authentication is “used all over the place in PAC-enabled binaries ,” it only works “as a last step in exploitation, when everything except for pointer authentication has been bypassed.”
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