PS4 crypto coprocessor exploit found, allows for dumping of console keys
Yet another PlayStation 4 exploit has been found. While it may not be one that lets you run CFW, this bug has its own intriguing uses. Scene hacker Flat_z managed to come up with a code that exploits the PS4's Crypto Coprocessor interface. This can lead to being able to bruteforce certain specific keys from the console, such as the AES/HMAC PFS, portability keys, and VTRM, which can then be dumped. This exploit can be used on any PS4 on firmwares below 7.55, as that's when Sony apparently patched the issue. While this doesn't have much use for the end-user right now, we'll be able to see what developers can do with them and if they can further the PlayStation 4 hacking scene.
so, PS4 Crypto Coprocessor (CCP) interface in secure kernel had a bug that allowed us to dump (or better saying, bruteforce) key slots from SAMU,
— Aleksei Kulaev (@flat_z) December 18, 2021
that's how AES/HMAC keys from PFS, portability keys, VTRM keys, etc could be retrieved on unpatched firmware:https://t.co/6V1BFnKxuM
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