Category PS4 Jailbreaking       Thread starter PSXHAX       Start date Dec 27, 2017 at 4:03 AM       84,083       157            
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Following the Adieu PS4 Kernel Exploit and his confirmation yesterday, today the PS4 scene is LIT AS F*CK for the holidays with the RELEASE of a fully implemented kernel exploit for PS4 v4.05 Firmware by @SpecterDev via Twitter alongside a debug_settings.bin Test Payload! :tree::santa: Howbow dah, Sony? :bananaman3::bananaman13:

Download: PS4-4.05-Kernel-Exploit-master.zip / GIT / Live Demo via @01cedric / Live Demo (Mirror #2) via @0x199 / Live Demo (Mirror #3) via @Red7s / Live Demo (Mirror #4) via @tunip3 / Live Demo (Mirror #5) via @EdiTzZMoDz / debug_settings.bin (16.23 KB Test Payload)
In addition, proceeding his PS4 Package (PKG) research today PlayStation 4 developer @flatz announced on Twitter that in a few days he'll share some of his recent work so that it can be backported from 4.55 to 4.05 for use on PS4 jailbroken consoles! <3:fire:

To quote from the README.md: PS4 4.05 Kernel Exploit

Summary

In this project you will find a full implementation of the "namedobj" kernel exploit for the PlayStation 4 on 4.05. It will allow you to run arbitrary code as kernel, to allow jailbreaking and kernel-level modifications to the system. This release however, does not contain any code related to defeating anti-backups mechanisms or running homebrew. This exploit does include a loader that listens for payloads on port 9020 and will execute them upon receival.

You can find fail0verflow's original write-up on the bug here, you can find my technical write-up which dives more into implementation specifics here (this is still in progress and will be published within the next few days).

Patches Included

The following patches are made by default in the kernel ROP chain:
  1. Disable kernel write protection
  2. Allow RWX (read-write-execute) memory mapping
  3. Dynamic Resolving (sys_dynlib_dlsym) allowed from any process
  4. Custom system call #11 (kexec()) to execute arbitrary code in kernel mode
  5. Allow unprivileged users to call setuid(0) successfully. Works as a status check, doubles as a privilege escalation.
Notes
  • This exploit is actually incredibly stable at around 95% in my tests. WebKit very rarely crashes and the same is true with kernel.
  • I've built in a patch so the kernel exploit will only run once on the system. You can still make additional patches via payloads.
  • A custom syscall is added (#11) to execute any RWX memory in kernel mode, this can be used to execute payloads that want to do fun things like jailbreaking and patching the kernel.
  • An *** is not provided in this release, however a barebones one to get started with may be released at a later date.
  • I've released a sample payload here that will make the necessary patches to access the debug menu of the system via settings, jailbreaks, and escapes the sandbox.
Contributors

I was not alone in this exploit's development, and would like to thank those who helped me along the way below.
:idea: If anyone is seeking the official Sony PlayStation 4 v4.05 Firmware (OFW), here are some mirrors in order to Update to a Specific PS4 Firmware: Firmware.v4.05.PS4.iNTERNAL-PS4FW
  • PS4 OFW 4.05 Download Links: Darthsternie
  • PS4 OFW 4.05 PUP MD5 Hash: 203c76c97f7be5b881dd0c77c8edf385
:arrow: Those looking to buy a PS4 v4.05 console see the update HERE for a list of bundles most likely to be on 4.05 (or lower) when in new / unopened condition.

For those that prefer to Host Your Own PS4 Webkit Exploit Page see the guide, and below is a tutorial from tunip3 on:

:note: How to Install the Debug Settings or Run Other Payloads on Your PS4 v4.0.5

This guide will not mention how to access the browser. This guide uses Specter's 4.0.5 kernel exploit. You will need to find your PS4 IP on your local network. This guide will also work for linux just replace the nc.exe with nc
Code:
nc -w 3 [ps4 ip] 9020 < debug_settings.bin
Hope everyone had a Merry Christmas! Here's the 4.05 kernel exploit, fully implemented. Enjoy! Write-up coming soon!
After @SpecterDev released his exploit, i'll prepare stuff within a couple of days, someone need to backport it from 4.55 to 4.05, not hard to do. not sure if it will be a write-up or just snippets of code, let's see
I've also uploaded a test payload you can use after the kernel exploit runs that jailbreaks and patches the kernel to allow access to debug settings, just needs to be netcatted to the loader via port 9020.
[4.05] PS4 DEBUG SETTING BY SPECTER
PS4 4.05 PKG INSTALL
Someone told me this is not working yet. That is not correct. PKG installs fine. The problem is you would need a license file to play the content. PKG must be on root of USB just like on 1.76. Exciting times....
uart enabler for 4.05 :)
Code:
uint16_t *securityFlags = (uint64_t *)(kernel_base+0x2001516); *securityFlags = *securityFlags & ~(1 << 15); *(char *)(kernel_base + 0x186b0a0) = 0;
right, i only solder 1 wire (tx on ps4) and attach gnd wire to hdd cage, then using like 5$ uart to usb i listen on arduino(serial montor). very simple.
if anyone wants to continue trying to port the exploit to 3.55 you can use this, i was as far as trying to leak a good object, rop was working etc, just specters leak could never get a suitable object for the exploit on 3.55

Download: 3.55-specterPort.7z (16.48 KB) / PS4 Entrypoint 4.05 by IDC


Download: kernel_355_jig.7z (29.90 MB) / 355_modules.7z (9.83 MB)

Big THANKS to @ArthurBishop, @hyndrid, @Nesterwork, @ombus, @UmarDaBest559 and everyone else in the PSXHAX Shoutbox for this PS4 4.05 full kernel exploit news and let the jailbreaking begin! :D
PS4 4.05 Scene LIT AF, Kernel Exploit Now Released by SpecterDev!.jpg
 

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JensGoro

Member
Contributor
Hi im sorry If my question is crap.... but I don't understand correctly....

1. It's possible to downgrade 4.54 FW to cfw 4.05?

2. If i Install cfw, i can play online Games too?
 

PSXHAX

Staff Member
Moderator
Contributor
Verified
1) There is no PS4 CFW yet, only a Kernel Exploit in this thread you can use with PS4HEN to play some backup games and homebrew on 4.05 OFW.

2) You can't use a 4.05 online because to connect to Sony's PSN servers they require the latest version 5.05 OFW so you would have to update to play online and lose the exploit then.
 

MaSsAcReuR

Senior Member
Contributor
Hi,

I'm trying to understand why this kexploit has been released and why they are not releasing the v4.55 or v5 now?

Are they waiting for Sony to release a fix first?

I know they are scared of Sony but then why this kexploit and not the next one?
 

offLife

I miss geohot
Senior Member
Contributor
We don't know. We simple don't know. You are allowed to release exploits for anything, as long as you don't support illegal things like backups, I think.

Exploits are worth lots of money too, for example a jailbreak for iPhone on the latest version is like 1 million dollars.

And yeah maybe some developers are scared for sony when they release an exploit for the latest version since there will be many many people trying to hack the PS4
 
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