Apple stops signing iOS 11.1.2, blocking Jailbreakers from updating

Apple has just stopped signing iOS 11.1.2 firmware for all iPhone, iPad, and iPod models. Here’s what you can do now to ensure you still get a jailbreak.

Apple kills iOS 11.1.2 after dropping iOS 11.2 

Just as I predicted, Apple has finally killed iOS 11.1.2 after dropping iOS 11.2.1 three days back.

This move was obviously long coming since iOS 11.1.2 had a serious vulnerability present in its kernel. All restores and downgrades to iOS 11.1.2 in iTunes will now stop working so there’s no point in trying this out.

Moreover, TSS Checker utility confirms that iOS 11.1.1 and 11.1.2 are no longer signed.

ios 11 firmware

For those who are out of the loop, iOS 11.1.2 is the last version that Ian Beer’s kernel exploit supports. This is the reason why I told all jailbreakers to update to this version as quickly as possible.

If you are already on iOS 11.1.2, you are all set and there’s nothing you should worry about now.

Just don’t do stupid things like changing the resolution or applying .plist hacks using the async_wake exploit. These shenanigans can prove costly at the end and force you to upgrade your device to iOS 11.2.1.

Is a future upgrade with SHSH Blobs possible?

As you already know, I posted about SEP incompatibility of iOS 11.2 with iOS 11.1.2 a while back.

SEP compatibility is an integral part of the future restore process. Therefore, users who have saved SHSH Blobs for iOS 11.1.2 or below, won’t be able to upgrade.

The restore process will simply fail, no matter what.

This essentially means you won’t ever be able to update to this version, except if you didn’t do so already. The only version you can get right now iOS 11.2 and 11.2.1.

What are my options now?

iOS 11.2 and above

If you are on iOS 11.2 and above, there’s no point in downgrading now. The best you can do right now is stay where you are without updating.

No exploit supports these versions as of yet but Pandora labs recently developed a jailbreak for it.

iOS 11.1.1 and below

If you are on iOS 11-11.1.1, you are completely safe because these versions share the same structure as that of iOS 11.1.2.

Ian Beer’s latest exploit supports iOS 11.1.2 and all versions below it as well.

iOS 10.3.3 and below

iOS 10.3.3 and below users will have to make do with what they have now. You just can’t upgrade to a vulnerable iOS 11 version.

However, you can stay where you are and hope for an incoming iOS 10.3.3 jailbreak for 64-bit devices based on Siguza’s exploit.

If you own an A7 device, you can use v0rtexNonce utility to downgrade to iOS 10.2 or 10.2.1 and then jailbreak it successfully with existing tools.

If you are still unsure about what to do, simply leave a comment stating your device and current firmware version. I will then suggest you the best course of action.

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10 Comments

  1. Sailesh Thapa December 18, 2017
  2. Jczen December 17, 2017
    • iOS Expert December 17, 2017
  3. Muduru December 17, 2017
    • iOS Expert December 17, 2017
  4. dmitriy December 17, 2017
    • dmitriy December 17, 2017
    • iOS Expert December 17, 2017
  5. Addiel Gutierrez December 16, 2017
    • iOS Expert December 16, 2017

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