Apple in update 12.4.1 fixed an iOS security bug that allowed installing a jailbreak program with access to system privileges in the kernel on the iPhone with the latest version of the OS. On the official website of the company it is reported that the problem was eliminated by optimizing the memory.
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In Cupertino, they thanked the hacker pwn20wnd – it was he who discovered the vulnerability and released an updated version of the jailbreak.
Such system or root rights give the user the ability to run applications that Apple prohibits installing. Jailbreak allows you to access the file system and expand the capabilities of the device. However, this freedom has a flip side – the device can easily “catch” viruses. Some spyware programs provide access to user messages, geolocation data and call records thanks to jailbreak.
Recall that a few months ago, Apple found and fixed the same vulnerability in iOS 12.3, but accidentally canceled it in the latest update.