DSiWare exploits

Mit dem DSi Update auf 1.4.2 wurden nicht nur Karten blockiert,
auch zukünftige DSi-Ware-Savegame-Exploits wird es nicht mehr geben,
man kann entsprechende Software nicht mehr in den NAND der Konsole kopieren.
So auch beim Sudokuhax, dieser funktioniert auch in einer Konsole mit 1.4.2,
wenn er schon auf den NAND kopiert wurde.
Wird er allerdings gelöscht, kann er nicht mehr in den internen Speicher
aufgespielt werden.

Zitat

DSi system update 1.4.2 blocks copying all current and future DSiWare exploits to “internal memory”. Most of you won’t have the final DSiWareHax target, but don’t update for now anyway. Only people who already have the target game, and stay on system version 1.4.1(or below) until exploit release could copy the exploit to “internal memory”. DSiWare savedata exploits are dead with system update 1.4.2, after the release of this exploit later, there will be no more DSiWare savedata exploits.

The EC certificate APCert in the DSiWare on SD card signs the hashes stored in the DSiWare on SD card, this includes hashes of savedata among other things. This APCert is signed by the console-unique TWCert, this cert is signed by Nintendo. This TWCert is stored in NAND.

The initial system settings title verified the APCert with the TWCert contained in the DSiWare stored on SD card. This allowed us to modify DSiWare savedata, since we could resign the APCert with any TWCert from other systems. The new 1.4.2 system settings title verifies the APCert with TWCert stored in NAND. This stops us from modifying DSiWare savedata for arbitrary systems, as the only way to get those system certs is from NAND. When you don’t already have DSiWareHax, it’s impossible to obtain your system certs without soldering NAND. The new system settings will not allow any DSiWare on SD card signed by other systems to copy to “internal memory”.

Quelle:hackmii.com