Homebrew Why cant we just use the safe mode update

[Lemondemonforever]

Ok, so this might sound dumb, so don't post comments like "Oh my god...". Why cant we just make UPDATE.PUP'S for CFW on ps4, and then update using safe mode?

 

[jeffyTheHomebrewer]

Probably because only Sony knows how to make those?
I don't even own any PS hardware aside from 2 PS1 controllers and a DualShock 4, I'm just giving my $1.50 here.

 

[CeeDee]

Probably because only Sony knows how to make those?

Kind of correct - even if we could put together an unofficial update file, those kinds of things are signed by Sony, which isn't something that can really be faked. Without a signature, the OS wouldn't accept the update.

 

[jeffyTheHomebrewer]

Kind of correct - even if we could put together an unofficial update file, those kinds of things are signed by Sony, which isn't something that can really be faked. Without a signature, the OS wouldn't accept the update.

Somehow I forgot that signing was a thing. I just kinda meant the way it was packaged in general; Even if we can make CFW, we still probably can't make a vaild binary UPDATE.PUPS, let alone sign it.

 

[Lemondemonforever]

Ok, just wondering why that wouldn't work. Thanks.

 

[nikeymikey]

Ok, so this might sound dumb, so don't post comments like "Oh my god...". Why cant we just make UPDATE.PUP'S for CFW on ps4, and then update using safe mode?

If its were that simple then it would already have been done ages ago. Sony did NOT repeat the mistakes they made on the PS3 security when they designed the PS4.

 

[KiiWii]

Ok, so this might sound dumb, so don't post comments like "Oh my god...". Why cant we just make UPDATE.PUP'S for CFW on ps4, and then update using safe mode?

How you gonna sign that pup? As stated above it’s all to do with keys.

 

[remlei]

Ok, just wondering why that wouldn't work. Thanks.

you need for that firmware to be signed using private keys which "only" Sony had and no one else.

this is not you usual PC that can install your own OS kind of scenario here, PS4 will only run software that is officially made by them, not by someone.

 

[ParrotDEV]

well it could be possible to modify a PS4 9.00 firmware with a Version-Variable exploit (which im developing and shouled be unpatchable) that tells it that it's the latest version to force it to update trough safe-mode, im still figuring it out but that should be possible... i have dono some progress but i might have to deompile the HEX becouse you can open it through HxD Editor

 

[HellGhast]

Kind of correct - even if we could put together an unofficial update file, those kinds of things are signed by Sony, which isn't something that can really be faked. Without a signature, the OS wouldn't accept the update.

Kinda like the good 'ol days of Ps3 where All phat launch models could be loaded with "signed" CFW.

Some early slim models also had this vulnerability, no such luck on super-slims.

 

[KiiWii]

well it could be possible to modify a PS4 9.00 firmware with a Version-Variable exploit (which im developing and shouled be unpatchable) that tells it that it's the latest version to force it to update trough safe-mode, im still figuring it out but that should be possible... i have dono some progress but i might have to deompile the HEX becouse you can open it through HxD Editor

Hmm, I’m skeptical that this is achievable.

I look forward to seeing what you produce without keys.

 

[ParrotDEV]

Hmm, I’m skeptical that this is achievable.

I look forward to seeing what you produce without keys.

theoretically you don't even need to sign it becouse it is already signed

Post automatically merged: Oct 25, 2023

Hmm, I’m skeptical that this is achievable.

I look forward to seeing what you produce without keys.

it works by tricking the console to think that its a new version and so it updates, however i think i need to modify the files on the HDD since it probably does a check with the latest firmware version PUP

 

[master801]

theoretically you don't even need to sign it becouse it is already signed

Post automatically merged: Oct 25, 2023

it works by tricking the console to think that its a new version and so it updates, however i think i need to modify the files on the HDD since it probably does a check with the latest firmware version PUP

I don't think you understand how the console works at all, but I'll bite.

Hard drive is encrypted with key(s) we don't have, and even if there was a way to get them, how do you propose a method to obtain them without homebrew or even an exploit in the first place?

Firmware check isn't on the hard drive. Try again.

https://www.psdevwiki.com/ps4/Partitions
https://www.psdevwiki.com/ps4/Files_on_the_PS4

 

[jeffyTheHomebrewer]

Also, wouldn't modifying even a SINGLE byte of the firmware break its signing?

 

[master801]

Also, wouldn't modifying even a SINGLE byte of the firmware break its signing?

Yes it would break the hash.

 

[KiiWii]

@ParrotDEV are you for real?

Using HXD alone won’t hack a console, what you’re saying sounds familiar to something I saw and blocked on Twitter this morning… which was pure clickbait and absolute garbage with their “facts”.