Thread: Kindle Jailbreak in 2024
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Old 07-12-2024, 12:25 PM   #35
j.p.s
Grand Sorcerer
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Quote:
Originally Posted by hexhexhex View Post
Maybe I'm coming from a baremetal perspective where DFU usually mean a total reflash of the postupdate active partition.
Kindles don't have factory reset (flash original firmware), they have plain reset, which resets all configurations to default, clears all the sqlite databases in /var, and erases all user data in /mnt/us, which is the partition exported over USB mass storage.

The essential effect of the jailbreak process is to get a community developer key into /etc/uks, which can only be done by exploiting some vulnerability. Over time, functionality was added to squirrel away the ability to restore the developer key during a restart (reboot) after a firmware update or a reset. If an update is followed by a reset without a restart, or vice versa, bye bye jailbreak.

The developer key is needed because only packages signed by a key in /etc/uks can be installed. Of course, once USBnetworking or a terminal emulator is installed, / can be mounted rw long enough to put anything you want anywhere you want.
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