If you are already jailbroken on iOS 8.4, possibilities are that you jailbroke it using TaiG 2.2.0 which has a ‘‘ setreuid’ security defect that can provide apps root access on your device. The excellent news right here is that a fix for it is already out in the type of TaiG 2.2.1.
Now if you have simply jailbroken utilizing TaiG 2.2.1 or are going to jailbreak fresh using TaiG 2.2.1, you are certainly not affected by this. As pointed out above, this just influences those devices which were jailbroken making use of earlier variations of TaiG like variation 2.2.0.
So exactly what if you are jailbroken already on iOS 8.4? Do you need to restore to 8.4 again, jailbreak and set up everything again from scratch? Nope. There’s an upgrade out on Cydia that includes fix for setreuidpatch to avoid providing apps root access on your jailbroken iPhone or iPad.
Here’s what you need to do to update your already jailbroken iOS 8.4 device to TaiG v2.2.1 untether package from Cydia.
Step 1: Launch Cydia and wait for everything to load completely.
Step 2: Tap on Sources -> Edit -> Add and then add the following repositories:
Note: This update isn’t available on Cydia’s default Telesphoreo repository yet. But once it’s available, you won’t need to add TaiG’s repositories mentioned above.
Step 3: Now search for TaiG 8.1.3-8.x Untether v2.2.1 package and update to it.
Once the update is set up, the existing iOS 8.4 jailbreak on your iPhone, iPad or iPod touch will get the 2.2.1 upgrade that includes the all essential fix for setreuid patch.
For tutorials on the best ways to jailbreak iOS 8.4, check out: