Today, an information security researcher known by the pseudonym axi0mX has published a jailbreak for almost any Apple device with chips from A5 to A11, released between 2011 and 2017. That is, jailbreak is relevant for models from iPhone 4S to iPhone 8 and X. It cannot be used remotely - you need physical access to the device.
The specialist jailbreak, which he admittedly has been working on all year, relies on the new Checkm8 exploit (read "checkmate", meaning "checkmate") for a bootrom vulnerability. Axi0mX himself describes this exploit as "permanent and unrecoverable".
The fact is that most jailbreaks exploit vulnerabilities in the iOS operating system and its components, but we rarely talk about vulnerabilities in the bootrom and their exploitation. At the same time, it is these jailbreaks that are most valued, since they are permanent, because to fix the vulnerability in the bootrom, physical modification of the device chipsets is required, and no company will withdraw so many gadgets from sale and replace them ...
The last jailbreak using bootrom problems was created almost ten years ago by the famous hacker George Hotz aka GeoHot, so the release of Checkm8 is, without exaggeration, a landmark event, because many believed that Apple engineers managed to fix all the gaps in this area ...
The axi0mX code is already available on GitHub, although so far this is only a beta version, clearly not intended for the general user, which can accidentally turn the device into a "brick". The researcher writes that the jailbreak does not work on devices based on Apple A12 and A13, and there may also be problems with older devices like the iPhone 4S, which he has not devoted much time to.
