6,264
edits
Changes
→Possible firmware downgrade vulnerability
:There's no way to convert a NAND image from one 3DS for use on another 3DS, without generating the NAND xorpad(s) for both systems(requires ARM9 code exec on both). Another reason why ARM9 exec is needed here is because there's certain files stored in CTRNAND containing console-unique AESMACs. Since that keyslot is initialized by bootrom those AESMACs can only be calculated on the same 3DS which you're calculating these CTRNAND AESMACs for. --[[User:Yellows8|Yellows8]] 18:02, 10 April 2014 (CEST)
:There's no way to convert a NAND image from one 3DS for use on another 3DS, without generating the NAND xorpad(s) for both systems(requires ARM9 code exec on both). Another reason why ARM9 exec is needed here is because there's certain files stored in CTRNAND containing console-unique AESMACs. Since that keyslot is initialized by bootrom those AESMACs can only be calculated on the same 3DS which you're calculating these CTRNAND AESMACs for. --[[User:Yellows8|Yellows8]] 18:02, 10 April 2014 (CEST)
::I'm not about converting a NAND image from system to another directly. Can we alculate for a various firmware byte-to-byte XOR-difference, which result the same xorpads for each system to annihilate. And for the same CTRNAND files untouched with a firmware update this difference will be zero. So applying this difference for another console CTRNAND will update a firmware without the need of the actual console-unique xorpad--[[User:Duke srg|Duke srg]] 21:48, 10 April 2014 (CEST)
::I'm not about converting a NAND image from system to another directly. Can we alculate for a various firmware byte-to-byte XOR-difference, which result the same xorpads for each system to annihilate. And for the same CTRNAND files untouched with a firmware update this difference will be zero. So applying this difference for another console CTRNAND will update a firmware without the need of the actual console-unique xorpad--[[User:Duke srg|Duke srg]] 21:48, 10 April 2014 (CEST)
:::The CTRNAND files /w console-unique AESMACs I'm referring to get updated when sys-updates get installed, if those don't get updated properly(invalid AESMACs for example) you would have a system which would fail to boot when it tries to launch titles from CTRNAND-FS. There's no way to properly update those files without proper NAND xorpads/etc. --[[User:Yellows8|Yellows8]] 22:11, 10 April 2014 (CEST)