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MIT researchers find Apple M1 chip vulnerability

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MIT researchers find Apple M1 chip vulnerability

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Today, MIT Computer Science and Artificial Intelligence Laboratory (CSAIL) scientists released research highlighting a novel hardware attack that can disable an Apple M1 chip’s pointer authentication mechanism.

The threat, dubbed “PACMAN”, by MIT researchers Joseph Ravichandran and Weon Taek Na as well as Jay Lang and Mengjia Yan allows attackers to block the M1 chip’s detection of software bug attacks.

This vulnerability is caused by an attacker who successfully guesses a value for the Pointer Authentication Code, (PAC), which is a code that verifies that a program was not modified maliciously and disables it. It’s not difficult to guess the value because an attacker can check repeatedly if it is correct or current by using a hardware channel.

For enterprises, this vulnerability is important to be aware of due to the increase in adoption of Apple devices in enterprise environments, with 23% of users in US enterprises currently using Mac devices.

How dangerous is the Apple M1 chip vulnerability?

It is important to remember that the PACMAN exploit does not completely bypass security measures on the Mac device but it prevents the M1 chips from identifying malicious code bugs that the pointer authentication mechanism would have identified.

While this vulnerability is not insignificant, researchers say there is no reason to panic. Joseph Ravichandran, a PhD student at MIT CSAIL and coauthor of the research, said that so far, no end-to-end attacks have been made using PACMAN. Therefore, there is no immediate reason to panic.

“PACMAN must have a known software vulnerability in order to function. The attacker must be able write out of bounds memories. Ravichandran explained that the attacker could use the bug and a “PACMAN Gadget”, which is a sequence of code in the victim that allows the speculative usage of a signed pointeder.

The attacker can use this device to try and guess the code. This vulnerability cannot be fixed with a software patch, as it exploits a hardware mechanism.

Ravichandran notes that the vulnerability is not a cause for concern but that exploiting the pointer authentication mechanism to attack future ARM processors using speculative execution could lead to a repeat of the PACMAN concept.

Tips to defend against the vulnerability

In enterprise environments that have Mac users, Ravichandran suggests that security teams ensure that their device software is up-to-date in order to fix any security issues.

This ensures that an attacker will not be able leverage bugs to compromise the device. Potential attackers won’t have the ability to exploit the M1 chip vulnerability without patching software bugs.

One of the best ways to get employees to update their Mac OS is to teach them how to install Mac OS updates automatically using System Preferences.

If security teams want more visibility over patch status for multiple Mac devices, they can also use patch management tools to scan for missing patches, and push them out remotely to ensure there’s no security gaps.

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Nothing announces official launch date for new Ear (stick) AirPods alternatives

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Nothing announces official launch date for new Ear (stick) AirPods alternatives
Nothing Ear (stick) held by a model on white background



(Image credit: Nothing )

True to form, Nothing has just announced the full reveal date for its upcoming audio product, Ear (stick). 

So, an announcement about an announcement. You’ve got to hand it to Carl Pei’s marketing department, they never miss a trick.

What we’re saying is that although we still have ‘nothing’ conclusive about the features, pricing or release date for the Ear (stick) except an image of another model holding them (and we’ve seen plenty of those traipsing down the catwalk recently), we do have a date – the day when we’ll be granted official access to this information. 

That day is October 26. Nothing assures us that on this day we’ll be able to find out everything, including pricing and product specifications, during the online Ear (stick) Reveal, at 3PM BST (which is 10AM ET, or 1AM on Wednesday if you’re in Sydney, Australia) on nothing.tech (opens in new tab)

Any further information? A little. Nothing calls the Ear (stick), which is now the product’s official name, “the next generation of Nothing sound technology”, and its “most advanced audio product yet”. 

But that’s not all! Apparently, Ear (stick) are “half in-ear true wireless earbuds that balance supreme comfort with exceptional sound, made not to be felt when in use. They’re feather-light with an ergonomic design that’s moulded to your ears. Delivered in a unique charging case, inspired by classic cosmetic silhouettes, and compactly formed to simply glide into pockets.” 

Opinion: I need more than a lipstick-style case

Nothing Ear (stick) – official leaked renders pic.twitter.com/FrhKmRttmiOctober 1, 2022

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It’s no secret that I want Nothing’s earbuds to succeed in world dominated by AirPods; who doesn’t love a plucky, eccentric underdog? 

But in order to become some of the best true wireless earbuds on the market, there is room for improvement over the Nothing Ear 1, the company’s inaugural earbuds. 

Aside from this official ‘news’ from Nothing, leaked images and videos of the Ear (stick) have been springing up all over the internet (thank you, developer Kuba Wojciechowski) and they depict earbuds that look largely unchanged, which is a shame. 

For me, the focus needs to shift from gimmicks such as a cylindrical case with a red section at the end which twists up like a lipstick. Don’t get me wrong, I love a bit of theater, but only if the sound coming from the earbuds themselves is top dog. 

As the natural companions for the Nothing Phone 1, it makes sense for the Ear (stick) to take a place similar to that of Apple’s AirPods 3, where the flagship Ear (1) sit alongside the AirPods Pro 2 as a flagship offering. 

See, that lipstick case shape likely will not support wireless charging. That and the rumored lack of ANC means the Ear (stick) is probably arriving as the more affordable option in Nothing’s ouevre. 

For now, we sit tight until October 26. 

Becky is a senior staff writer at TechRadar (which she has been assured refers to expertise rather than age) focusing on all things audio. Before joining the team, she spent three years at What Hi-Fi? testing and reviewing everything from wallet-friendly wireless earbuds to huge high-end sound systems. Prior to gaining her MA in Journalism in 2018, Becky freelanced as an arts critic alongside a 22-year career as a professional dancer and aerialist – any love of dance starts with a love of music. Becky has previously contributed to Stuff, FourFourTwo and The Stage. When not writing, she can still be found throwing shapes in a dance studio, these days with varying degrees of success.  

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YouTube could make 4K videos exclusive to Premium subscribers

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YouTube could make 4K videos exclusive to Premium subscribers
Woman watching YouTube on mobile phone screen



(Image credit: Shutterstock / Kicking Studio)

You might soon have to buy YouTube Premium to watch 4K YouTube videos, a new user test suggests.

According to a Reddit thread (opens in new tab) highlighted on Twitter by leaker Alvin (opens in new tab), several non-Premium YouTube users have reported seeing 4K resolution (and higher) video options limited to YouTube Premium subscribers on their iOS devices. For these individuals, videos are currently only available to stream in up to 1440p (QHD) resolution.

The apparent experiment only seems to be affecting a handful of YouTube users for now, but it suggests owner Google is toying with the idea of implementing a site-wide paywall for access to high-quality video in the future.

So, after testing up to 12 ads on YouTube for non-Premium users, now some users reported that they also have to get a Premium account just to watch videos in 4K. pic.twitter.com/jJodoAxeDpOctober 1, 2022

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It’s no secret that Google has been searching for new ways to monetize its YouTube platform in recent months. In September, the company introduced five unskippable ads for some YouTube users as part of a separate test – an unexpected development that, naturally, didn’t go down well with much of the YouTube community. 

A resolution paywall seems a more palatable approach from Google. While annoying, the change isn’t likely to provoke the same level of ire from non-paying YouTube users as excessive ads, given that many smartphones still max out at QHD resolution anyway. 

Of course, if it encourages those who do care about high-resolution viewing to invest in the platform’s Premium subscription package, it may also be more lucrative for Google. After all, YouTube Premium, which offers ad-free viewing, background playback and the ability to download videos for offline use, currently costs $11.99 / £11.99 / AU$14.99 per month.

Suffice to say, the subscription service hasn’t taken off in quite the way Google would’ve hoped since its launch in 2014. Only around 50 million users are currently signed up to YouTube Premium, while something close to 2 billion people actively use YouTube on a monthly basis. 

Might the addition of 4K video into Premium’s perk package bump up that number? Only time will tell. We’ll be keeping an eye on our own YouTube account to see whether this resolution paywall becomes permanent in the coming months.

Axel is a London-based staff writer at TechRadar, reporting on everything from the newest movies to latest Apple developments as part of the site’s daily news output. Having previously written for publications including Esquire and FourFourTwo, Axel is well-versed in the applications of technology beyond the desktop, and his coverage extends from general reporting and analysis to in-depth interviews and opinion. 

Axel studied for a degree in English Literature at the University of Warwick before joining TechRadar in 2020, where he then earned a gold standard NCTJ qualification as part of the company’s inaugural digital training scheme. 

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Europe sets deadline for USB-C charging for (almost) all laptops

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Europe sets deadline for USB-C charging for (almost) all laptops

USB-C als Ladestandard in der EU

Mundissima / Shutterstock


Author: Michael Crider
, Staff Writer

Michael is a former graphic designer who’s been building and tweaking desktop computers for longer than he cares to admit. His interests include folk music, football, science fiction, and salsa verde, in no particular order.

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