Last night, Apple made available to the general public iOS 9.3.4 to everyone’s surprise (read: iOS 9.3.4 available on iPhone, iPad, iPod Touch). In its changelog, the Cupertino company indicated that this update (which has known no beta) fixes a major security flaw on the iPhone and iPad, and that it is recommended for all users.
Unfortunately, iOS 9.3.4 corrects well as we all presented the vulnerability used by PanGu for its jailbreak iOS 9.2 to iOS 9.3.3 (read: Tutorial: Jailbreak iOS 9.3.3 with PanGu and Cydia Impactor on Windows, Mac & Linux ).
Indeed, Apple has as usual after each upgrade of its mobile firmware published a note (in English) which lists the security fixes made. For iOS 9.3.4, there is only one and it concerns IOMobileFrameBuffer. It affects all iDevices from the iPhone 4s, the iPad 2 and the iPod Touch 5G.
The flaw allowed an application to execute arbitrary code with kernel privileges. More precisely, “Memory corruption issue resolved with better memory management”. As you can imagine, the credits go to Team Pangu, which thanks to its iOS 9.3.3 jailbreak has enabled Apple to improve its mobile operating system.
For now, the semi-untethered jailbreak of iPhone, iPad and iPod Touch with a 64-bit processor is still fully functional, and you can follow our tutorial: Tutorial: Jailbreak iOS 9.3.3 with PanGu and Cydia Impactor on Windows, Mac & Linux. If you accidentally upgraded to iOS 9.3.4, you can still downgrade your iDevice using iTunes, since iOS 9.3.3 is still signed by Apple.