For those already jailbroken on iOS 8.4, chances are that you jailbreak it using TaiG 2.2.0 which has a ‘setreuid’ security flaw that can give apps root access on your device. No worry as here a fix for it is already out in the form of TaiG 2.2.1.
Now that it has released a new version of iOS 8.4 jailbreak tool, you are going to jailbreak fresh using TaiG 2.2.1, obviously not affected by this. As oft-mentioned, this only aeffects those devices jailbroken using the earlier versions of TaiG like version 2.2.0.
If you have jailbroken already on iOS 8.4? Do you have to restore to iOS 8.4 again, jailbreak and set up everything from scratch? Nope. This new update is available on Cydia which includes fix for setreuid patch to prevent giving apps root access on your jailbroken iPhone or iPad on iOS 8.4.
First of all you need to update your already jailbroken iOS 8.4 device to TaiG 2.2.1 untether package from Cydia.
Note: If you have CyDown and Cydia Enable installed, update to their latest respective versions before installing this 2.2.1 update for TaiG. If not will result in Cydia crashing after TaiG 2.2.1 update. Careful!
Step 1: Launch Cydia and wait for everything to load completely.
Step 2: Tap on Sources -> Edit -> Add and then type the following repositories:
Notably, this update isn’t available on Cydia’s default Telesphoreo repo as yet. But once it’s available, you won’t need to add TaiG’s repositories mentioned above.
Step 3: Now serach for TaiG 8.1.3-8.x Untether v2.2.1 package and update to it.
Once the update is installed, the existing iOS 8.4 jailbreak on your iPhone, iPad or iPod touch will get the 2.2.1 upgrade which includes the all important fix for setreuid patch.
For tutorials on how to jailbreak iOS 8.4, check out: