Untethered bootrom exploit for iPhone 3GS (new bootrom)

Discussion in 'Jailbreaks and iOS Hacks' started by axi0mX, Apr 13, 2017.

  1. axi0mX macrumors newbie


    Apr 13, 2017
    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:

    Jailbreak tool:
  2. Applejuiced macrumors Westmere


    Apr 16, 2008
    At the iPhone hacks section.
    Sweet JB. Sucks that its about 10 years later but still good to have available.
    Verbose boot and untethered JB's for life for that device.
    Too bad we dont have anything like this for the newer devices.
  3. Manatlt macrumors 6502a

    Aug 26, 2013
    London, UK
    Also too bad most apps no longer work with 3GS/iOS 6 (and below).
  4. Peter K. macrumors 6502a

    Peter K.

    Nov 6, 2012
    SoCal / Philly
    True. How amazing would this be for the 6S or later?
  5. Applejuiced macrumors Westmere


    Apr 16, 2008
    At the iPhone hacks section.
    I still have hopes and dreams something will come out from our Chinese friends.
    Fully untethered would be great. Im not even asking for too much such as a hardware bootrom exploit pwned for life :D
  6. BrettApple macrumors 65816


    Apr 3, 2010
    Heart of the midwest
    This is awesome, I just took my 3GS from 6.1.6 back to 4.3.3, was going to go for 3.1.3 but iOS 4.3.3 runs nearly as well as 3.x if not faster due to multitasking support. 5 and 6 are what started to slow this old beast down. Even so 6.1 ran pretty well for it's age.

    Running great on 4.3.3 though! Had it on 4.1 for quite some time but nice to have it at nearly the last version of 4.x.

    IMG_0002.PNG IMG_0003.PNG

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5 April 13, 2017