A new vulnerability, which can allow for permanent jailbreaking in devices iPhone, was recently discovered by a security researcher. The vulnerability, called Checkm8, affects iPhone 4s models up to iPhone X.
Checkm8 targets bootrom, which means the exploit exists in the source code running on a device Apple.
As the bootrom code is read-only, it is almost impossible to repair the defect, either through overlay or through software updates.
The vulnerability works via USB, which means a person will need it computer to make the most of it on Apple devices. In addition, according to GitHub, users have been warned that exploitation could freeze device operation.
Which devices are vulnerable?
In accordance with tweet Published by Axi0mx, Apple devices from iPhone 4S (with A5 chipset) to iPhone X (with A11 chipset) are prone to Checkm8 vulnerability.
In addition, various models iPad and even the fifth-generation iPod Touch is vulnerable. This means that the newest iPhone XS and iPhone 11 series cannot be violated.
The flaw can be used for jailbreak and device downgrading iOS among other actions. However, while potentially affecting millions of iOS devices, the fact that it requires physical access limits its scope.
Jailbreaking after a while
For those who aren't aware, jailbreaking on iOS was quite popular two years ago.
Users often ran jailbreaks on iPhones to obtain features that otherwise would not exist on the devices.
However, Checkm8 is not easy to tackle, which has characterized it as one of the biggest jailbreak flaws of recent years. Obviously, it's welcomed by the jailbreaking community, as Apple won't be able to disable it without updating the hardware her.
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