iOS 12.1.2

Apple officially stops signing iOS 12.1.1 and 12.1.2, thwarting firmware downgrades via iTunes

Following an exceptionally-long and unheard-of grace period, Apple has officially stopped signing both iOS 12.1.1 and 12.1.2 Tuesday evening, a move that packs some serious implications for the jailbreak community.

Update: iOS 12.1.1 beta 3 is apparently still being signed at the time of this writing. Downgrade immediately while you have the chance!

Apple first launched these firmware versions on December 5th and December 17th respectively, each to address small bug fixes and performance improvements in the operating system. But as we know, no software is entirely bug-proof.

Security researcher Brandon Azad publishes voucher_swap exploit for pre-iOS 12.1.2 devices

Not long after tihmstar published his iOS 11.4-11.4.1-centric tfp0 exploit for headphone jack-enabled handsets, security researcher Brandon Azad followed up by releasing an exploit of his own intended for devices running iOS 12.1.2 and earlier.

Azad shared the news via Twitter Tuesday afternoon, including a link to documentation encompassing the exploit: