Back at it… MaTiAz & FreePlay have released a “Hello World” demonstration, as well as the SDK used to build said homebrew demo, for the newly discovered GripShift vulnerability.

Now coined the Sparta exploit, here’s what you should know: for the moment, you cannot downgrade or install a custom firmware with this, you may only enjoy Sparta-compiled homebrew and hope Sparta later leads to kernel mode access.

And finally, another video for your viewing pleasure –

FAQ
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Q: Will this allow downgrading?
A: No, because this is an usermode exploit and functions required to downgrade are only available in kernel mode.

Q: Why the name?
A: Because the original exploit was found by overwriting the player name with "this is spartaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa".

Q: Can/Will Sony block this?
A: Yes.

Q: I wanna make homebrew using the exploit. How?
A: Get FreePlay's GS SDK: http://tinyurl.com/sparta-sdk. It has some constraints though, check the readme. The Hello World was written with it.

Download:
The Sparta SDK
Hello World (for the Sparta Exploit)

– source: lan.st