About two weeks ago, security specialist @ S0rryMyBad announced that it had discovered an exploit of iOS 12.1.2 and below.
A few hours after Apple released iOS 12.1.3, @ S0rryMyBad fulfilled its promise and posted a screenshot of the proof of a bug he had teased earlier:
From the tweet, it’s clear that the specialist will publish a whole post about the exploit and its nuances.
It is worth noting that this bug can provideaccess to kernel memory, and then lead to the creation of a jailbreak. It is not yet known whether the exploit will be used for new versions of unc0ver and Electra, but the creator of the unc0ver jailbreak has previously expressed interest in the exploit. Of course, we cannot give any guarantees.
As usual, we recommend that you stay on the lowest possible version of the system. Usually, you need more than one bug to create a jailbreak, and Apple regularly fixes them in system updates.
iOS 12.1.1 is being signed, but it will change soon. If you have iOS 12.1.2 or 12.1.3, you can still roll back to the previous version of the system.