Checkra1n update supports iOS 14 but only for the A9 and A9X chips

Less than a week after Apple officially released iOS and iPadOS 14 to the public, the checkra1n team released checkra1n version 0.11.0 with support for Apple's latest and greatest mobile operating system ( though there are errors).

Notice of group checkra1n

Twitter page checkra1n shared the announcement on September 22:

Checkra1n team announced the launch of checkra1n 0.11.0

From what we can gather, checkra1n v0.11.0 supports iOS 14, but only on handsets with A9 (X) processor or higher.

The checkra1n team plans to add support for newer devices affected by the checkm8 exploit in the future, but this will take time and effort as Apple appears to have made it more difficult to roll out. checkm8 on devices from iPhone iPad with A10-A11 chip.

Why checkra1n v0.11.0 only supports A9-A9X chip

The checkra1n team explains this in a group blog post that:

In iOS 14, Apple added a new mitigation to SEPOS on A10 and above (except on Apple TVs and iBridge): if the device was booted from DFU mode and the Secure Enclave receives a request to decrypt user data, it will panic the device. Since checkm8 does not give us control over the Secure Enclave, this is not trivial to work around. However, with the recently published blackbird vulnerability, we are able to get control of the Secure Enclave on A10 and A10X and disable this mitigation. Support for A10 and A10X devices is being worked on and is expected to be ready in the coming weeks.

This paragraph roughly translates as:

In iOS 14, Apple added a new mitigation for SEPOS on A10 and later (except on Apple TV and iBridge): if the device is booted from DFU mode and the Secure Enclave receives a request to decrypt the data user, it will cause the device to panic. Since checkm8 does not give us control over the Secure Enclave, this is no trivial matter to resolve this issue. However, with the recently announced blackbird vulnerability, we can control the Secure Enclave on the A10 and A10X and disable this mitigation. Support for A10 and A10X devices is underway and is expected to become available in the coming weeks.

As for what we know, the checkm8 exploit cannot be patched because it is a hardware-based exploit. However, what Apple can do is add more sophisticated layers of security to their software like they have in iOS 14.

This makes it more difficult for checkra1n to work on the latest mobile devices that have been updated to the latest mobile operating system.

This is why the checkra1n team asked for more time. There is no specific release time on when checkra1n will add support for all devices newer than the A9 (X), but the checkra1n team has provided an estimate of "coming weeks" for the A10 and A10 devices. (X).

Unfortunately, they are still not sure about applying similar fixes to A11 devices like the iPhone X. The checkra1n team's transparency on iOS 14 support is both appreciated and commendable, as it is. helping those of us keep a close eye on these developments and helping us better understand what's going on behind the scenes.

Making an extensive statement without an exact launch date is also a good move, as the checkra1n team doesn't want to over-promise and also doesn't want people to lose trust in the group.

Changes on checkra1n v0.11.0

Notable changes of checkra1n v0.11.0:

  • Official support for iOS 12.0 - 13.7
  • Official support for iOS 14 / tvOS 14.0 (A8 -A9 running iOS 14 and iPadOS 14; all tvOS devices supported)
  • Official support for Apple TV 4K (Standard and Advanced)

So through the change log above we can also see that checkra1n also supports all iOS 13 (the latest version is 13.7).

List of iOS / iPadOS 14 devices supported by checkra1n v0.11.0

  • iPhone 6s, 6s Plus and SE
  • 5th generation iPad
  • iPad Air 2iPad mini 4
  • iPad Pro 1st generation
  • Apple TV 4 and 4K
  • iBridge T2

Devices to be supported in the coming week:

  • iPhone 7 and 7 Plus
  • iPad 6th and 7th generation
  • iPod touch 7
  • iPad Pro 2nd generation

If you're on any newer device and you've upgraded to iOS 14, then you still have a chance to downgrade to iOS 13.7 before Apple stops signing iOS 13.7 later this week.

There's still no jailbreak for iOS 13.7 with A12 devices and above, but if you follow the advice of the community leaders and use the lowest possible firmware, your chances of jailbreak eligibility increase. up.

Checkra1n is officially released at website and you can refer to this article for usage if you don't know.


Did the above information make you interesting? Don't forget to leave a comment if you have any questions.




The Checkra1n article updated to support iOS 14, but only for the A9 and A9X chips, first appeared on ThuThuatJB.


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