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Now that Linux on PS4 is a thing, and native PS4 exploits are going on for PS4 firmware 1.76, the PS4 scene is getting excited, and more and more people are looking for exploits on the latest firmwares.
There are basically two components to getting full access to your PS4: a “userland” exploit, that lets you access the current process, and a “kernel” exploit, or privilege escalation, that gives you root control to all processes on the machine. The two exploits are distinct, but you’ll always need one of each.
The commonly known user exploit on PS4 1.76 is a webkit exploit that was disclosed a while ago, and patched in further firmwares. The Kernel exploits used on 1.76 are BadIRET and dlclose, both revealed by hacker CTurt a few months ago. These two exploits would most likely still work on firmwares 2.xx, if a matching userland exploit was revealed on these firmwares.
Future kernel exploits could be discovered in firmwares 3.xx, but even today, revealing a userland exploit on firmwares 2.xx could help more people as this would give them access to the Kernel exploits as well.
It’s in this context that some people are busy, looking for more webkit exploits on the latest PS4 firmwares. for example, veteran scene member zecoxao has been digging for known Chrome/webkit vulnerabilities and is asking people to test which ones crash their PS4.
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Getting a new userland vulnerability released soon would probably help deal with the increasing prices of PS4 1.76 models. But for now, no such release has been announced by any of the known hackers.
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