03-16-2016, 09:20 AM
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#1 |
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Member
 Posts: 14
Karma: 10
Join Date: Feb 2016
Device: kindle PaperWhite, Ipad, Iphone
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fw5.7.3 can i Jailbreak?
Hi I have a Paper white 2 (6th Generation) with 5.7.3 firmware can this be jailbroken easy.
Thanks for help 
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03-16-2016, 09:43 AM
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#2 |
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Zealot
 Posts: 135
Karma: 1007000
Join Date: Sep 2013
Device: Kindle Paperwhite (7th Gen)
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No.
There is only a software Jailbreak for 5.6.5 nothing higher and unlikely there will be anything for a while/at all. Not sure of the serial jailbreaks limitations. |
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03-16-2016, 09:53 AM
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#3 | |
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The Grand Mouse 高貴的老鼠
Posts: 71,491
Karma: 306214458
Join Date: Jul 2007
Location: Norfolk, England
Device: Kindle Voyage
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Quote:
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03-17-2016, 09:12 AM
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#4 |
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eBook Enthusiast
Posts: 85,544
Karma: 93383043
Join Date: Nov 2006
Location: UK
Device: Kindle Oasis 2, iPad Pro 10.5", iPhone 6
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Moved to the dev forum, which is where such questions belong.
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03-17-2016, 10:10 AM
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#5 | |
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Going Viral
Posts: 17,212
Karma: 18210809
Join Date: Feb 2012
Location: Central Texas
Device: No K1, PW2, KV, KOA
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Quote:
The Recovery Menu does not check update firmware packages for "Downgrade Attack" (Lab126's phrase for it). (At least we haven't had any reports to the contrary.) Logically, it can't - It is intended to recover in situations where there might not be information available about the most recently installed firmware version. |
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03-17-2016, 01:30 PM
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#6 |
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BLAM!
Posts: 13,477
Karma: 26012492
Join Date: Jun 2010
Location: Paris, France
Device: Kindle 2i, 3g, 4, 5w, PW, PW2, PW5; Kobo H2O, Forma, Elipsa, Sage, C2E
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Actually, it does (I have an old IDA screenshot posted somewhere of the relevant code). It's just that (current) *factory* recovery packages do not include version information
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Last edited by NiLuJe; 03-17-2016 at 01:32 PM. |
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03-17-2016, 02:19 PM
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#7 | |
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Going Viral
Posts: 17,212
Karma: 18210809
Join Date: Feb 2012
Location: Central Texas
Device: No K1, PW2, KV, KOA
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Quote:
People have contacted me on how to downgrade using the recovery menu - And from their silence - assumed it had worked for them. Maybe it destroyed their Kindle and they just never wrote back. - - - - IT did work on the erased Kindle which was restored using Fastboot. That was not a factory recovery package but just the regular, Amazon posted update package. So it may check, but being unable to check must not be a fatal error. In another case - The update package was signed but the signature was found to be 128 bytes long instead of 256 bytes - Again, only a nasty log message, but not a fatal error to the load process. = = = = = All corner cases I hope to find time to play with. |
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03-17-2016, 03:16 PM
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#8 |
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BLAM!
Posts: 13,477
Karma: 26012492
Join Date: Jun 2010
Location: Paris, France
Device: Kindle 2i, 3g, 4, 5w, PW, PW2, PW5; Kobo H2O, Forma, Elipsa, Sage, C2E
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Yeah, the shortsig thing vaguely rings a bell...
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03-17-2016, 03:24 PM
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#9 | |
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Going Viral
Posts: 17,212
Karma: 18210809
Join Date: Feb 2012
Location: Central Texas
Device: No K1, PW2, KV, KOA
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Quote:
Of course, it would probably take a --create-corrupted option to KindleTool. Somehow that doesn't feel right, after all the work and effort to make KindleTool do things bitwise correct - to next give it an option that only copies the first half of the signature to the package . . . . Plus - people would use that new option in strange ways. 
Last edited by knc1; 03-17-2016 at 03:26 PM. |
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03-20-2016, 11:46 AM
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#10 |
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Junior Member
Posts: 8
Karma: 10
Join Date: Mar 2016
Device: Kindle 7
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fw5.7.3 can i Jailbreak?
Is there a way to downgrade from 5.7.3 to 5.6.5 to allow jailbreak then?
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