Released Monday. You can downgrade to any iOS version with a custom IPSW, have custom boot logos, verbose boot, install openiBoot, install Linux (if there is a compatible kernel/distro). This exploit gives you complete control over the device during boot, at the lowest level. It is called alloc8.
Bootrom exploits are notable, because they exploit code in read-only memory in the SoC, and that cannot be fixed with a software update. All iPhone 3GS devices will be vulnerable forever.
Before alloc8, the last time a bootrom exploit for iPhone was released publicly was in 2010. It was geohot's limera1n exploit, which works over USB but cannot be used for persistence (untethered jailbreak).
Technical write-up for those interested:
https://github.com/axi0mX/alloc8
Jailbreak tool:
https://github.com/axi0mX/ipwndfu
Bootrom exploits are notable, because they exploit code in read-only memory in the SoC, and that cannot be fixed with a software update. All iPhone 3GS devices will be vulnerable forever.
Before alloc8, the last time a bootrom exploit for iPhone was released publicly was in 2010. It was geohot's limera1n exploit, which works over USB but cannot be used for persistence (untethered jailbreak).
Technical write-up for those interested:
https://github.com/axi0mX/alloc8
Jailbreak tool:
https://github.com/axi0mX/ipwndfu
