Hacking Is it possible to downgrade 5.xx to 4.05?

rednekcowboy

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Actually it's not short sighted at all. The measures in place to prevent downgrading would require a hack of the boot loadeboot loader to be able to bypass. If you have boot loader it won't matter what firmware you are using as you will have kernel lvl code execution already. Therefore downgrading will be absolutely useless unless the user has a specific desire to be on that firmware to test something or what have you. I can link to the information on the wiki that confirms my statement if you wish but it is what it is.


I'm not going to get into a debate with you over how things are secured, but you are drawing incorrect conclusions and making incorrect assumptions simply because secured devices have many layers of protection and while you main gain access to a layer that say (to be simple), allows you to revert to a lower firmware, that access quite likely doesn't give you the control you need over the main system. It's really not that complicated to understand and there is a perfect, living and breathing example of that in the PS3.

We can now downgrade almost any console, but we still must downgrade the console in order to gain the access to run cfw and then re-upgrade the console to a higher firmware.

Different parts of a system have separate and unique layers of encryption unto themselves and that is relevant even moreso on the PS4 than on the PS3. Pwning on section does not necessarily give you the full access that you're assuming it does as they work independently of each other and are in separate sandboxes.
 

mikey420

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I'm not going to get into a debate with you over how things are secured, but you are drawing incorrect conclusions and making incorrect assumptions simply because secured devices have many layers of protection and while you main gain access to a layer that say (to be simple), allows you to revert to a lower firmware, that access quite likely doesn't give you the control you need over the main system. It's really not that complicated to understand and there is a perfect, living and breathing example of that in the PS3.

We can now downgrade almost any console, but we still must downgrade the console in order to gain the access to run cfw and then re-upgrade the console to a higher firmware.

Different parts of a system have separate and unique layers of encryption unto themselves and that is relevant even moreso on the PS4 than on the PS3. Pwning on section does not necessarily give you the full access that you're assuming it does as they work independently of each other and are in separate sandboxes.
I'm not going to go any further than to explain that there is a check within the devices boot loader that prevents one from reverting to an older firmware. Iirc it does so through the use of efuses. In short to defeat such a security would require a greater access to the system than is needed for piracy or homebrew so downgrading would not be necessary as you already have all you want/need. Hold on I'll look for the wiki page
 

rednekcowboy

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Nevermind quoting me anything. I don't care to continue this discussion. It's clear that we won't agree on this even though there is a real world example that proves you absolutely wrong. We've derailed the thread enough. Any further discussion is, quite honestly, an adventure in idiocracy to be blunt.
 
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Bernhard

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No idea what you're talking about. Never seen this aforementioned writeup. If you wanna see the slides he wrote for the presentation he made you can see them here: https://github.com/hwroot/Presentations/blob/master/Mess with the best die like the rest mode by Volodymyr Pikhur - REcon Brussels 2018.pdf
Ok yeah it s difficult to explainnactually what i mean...
look in this link by wololo
http://wololo.net/2017/10/20/adieu-...rmware-4-06-fully-detailed-team-fail0verflow/
thats the adieu writeup ... specter used to build the exploit of 4.05 :)
 

mikey420

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Nevermind quoting me anything. I don't care to continue this discussion. It's clear that we won't agree on this even though there is a real world example that proves you absolutely wrong. We've derailed the thread enough. Any further discussion is, quite honestly, an adventure in idiocracy to be blunt.
Oh please link me to the example. Willing to bet you have absolutely nothing that will prove me wrong.
 

mikey420

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Also don't give me an example from the PS3 the Vita or anything other than a PS4 as it just doesn't apply....

--------------------- MERGED ---------------------------

THE PS3!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Are you dumb? The PS3 is an entirely different device with entirely different security measures. Obviously you know not what the hell you're talking about. Enough said.
 

rednekcowboy

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Yes, the ps3 is an entirely different system. The PS4 is even worse than the ps3 for segregating the internal systems.....in fact, even within the same sandboxes there is multiple layers of encryption. The bootloader is completely segregated from the kernel, and even the bootloader has multiple layers. Even if it was pwned, the bootloader doesn't give you kernel access solely on it's own.

You have a lot to learn bud.
 
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Pedeadstrian

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Yes, the ps3 is an entirely different system. The PS4 is even worse than the ps3 for segregating the internal systems.....in fact, even within the same sandboxes there is multiple layers of encryption. The bootloader is completely segregated from the kernel, and even the bootloader has multiple layers. Even if it was pwned, the bootloader doesn't give you kernel access solely on it's own.

You have a lot to learn bud.
Please take this argument to your DMs.
 
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rednekcowboy

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Please take this argument to your DMs.

No worries, I'm done. No argument to be had here anyways. Was just trying to correct some misinformation. And just for clarity sakes, there is a hardware method to downgrade the ps4, though it's not publicly available.

Apologize for derailing the thread.
 
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mikey420

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Does the ps4 even have a NAND chip inside?
IDK if it's a NAND chip but the PS4 does have at least one 32mb flash memory chip. I believe simply for storing the OS "core" iirc like they did with later model PS3s Sony stores the critical or core parts of the OS on the flash chip and the rest is installed to the HDD. (This is also why the system software must be reinstalled when a new HDD is put in the device.)
 

NeoSlyde

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We are getting a kernel exploit for 5.0x very soon
My advice is to stay on 5.05
I can’t say more
Gonna get released when it’s gonna be patched
 

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