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Hackers discovers flaw in PlayStation 4 and PlayStation 5

Hacker claims to have discovered vulnerability on PlayStation 4 and 5 and that it’s impossible to fix

That might not be good news for Sony’s security team, but gamers looking to run homebrew software on Sony’s consoles can start rubbing their hands in glee.

It’s all been revealed on GitHub, and it seems that over time, the community will be able to exploit this software flaw in the system to run arbitrary code, thus unleashing the power of homebrew (and piracy) on the latest Sony hardware.

The problem lies with Sony’s PS2 emulator on PS4 — specifically, the just-in-time (JIT) compiler that turns PS2 code into PS4-ready code while a game is running. Sony has given the compiler privileged access to the system, so the machine treats every bit that comes out of it as legitimate. CTurt managed to hijack this compiler to run games that Sony did not authorize.

CTurt says the exploit will be very difficult for Sony to fix because of the way the company chose to distribute the code. Instead of building PS2-on-PS4 code into the operating system, the emulator ships with every downloadable, disc-based PS2 game released for PS4 (yes, there are a few). This means that if you have a copy of the emulator, a known exploit in a game from 20 years ago can be used to control the JIT compiler on PlayStation 5. Some of them are annoying to trigger on newer consoles, but they work.

If you’re not a programmer, it’s the future of Mast1c0re that should interest you. It’s currently a complex, multi-step process to load custom software on PS4 and PS5, but others may use Mast1c0re as the basis for a new homebrew explosion. Sony will undoubtedly try to stop it.

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