Yalu (iOS)

Yalu (formerly Yalu + Mach Portal) is a jailbreaking tool created by qwertyoruiop (Luca Todesco). It supports iOS 10.1, 10.1.1, and iOS 10.2 on all 64-bit devices pre-iPhone 7 and just iOS 10.1 and 10.1.1 on iPhone 7.^[1]

The jailbreak is semi-untethered, and requires to be rerun upon reboot. However, the app certificate expires seven days after sideloaded using Cydia Impactor.

Development

The jailbreak uses vulnerabilities released by Google's Project Zero.^[2]

Yalu + Mach Portal

Mach Portal was intended for developers. The final release for mach portal is Beta 4.1, which the developer reported it as broken.^[1] Initially, saurik's mobile substrate was not working. However, later versions attempted to fix mobileSubstrate, but it remained very unstable. Developers had to launch an app that had to be sideloaded using Cydia Impactor and wait for it to crash to activate it.

Support

Mach Portal only supported iPhone 7, iPhone 6s, and iPad Pro.

Yalu

Yalu is the successor to Mach Portal. It uses the same vulnerabilities that were patched in iOS 10.2.1. It was released for all 64-bit devices pre-iPhone 7. Because it is 64-bit, iPhone 5 and 5c are not supported.

Beta 1

Beta 1 verifies that mobile substrate works.

Beta 2

Beta 2 adds support for iPhone 5s/SE and 6, which was lacked in Mach Portal.g

Beta 3

Beta 3 fixes a glitch that users with an Apple Watch would experience.

Beta 4

Beta 4 patches the kernel, and forces Dropbear to use a more secure port instead of 0.0.0.0.

Beta 5

Underneath Beta 5 of the Yalu download page, qwertyoruiop writes "Placebo Effect".^[1]

Beta 6

Minor bug fixes are patched with this release.

Beta 7

Beta 7 adds support "for all iOS 10 64-bit devices".^[1] Jailbreakers have reported the Yalu jailbreak as stable, and many users are currently jailbroken under this setup.

References