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GeoHot Releases PS3 Hack, Exploit Your System and Enjoy!


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255w ago - As a BIG follow-up to his Sample PS3 Linux Isolated SPU Loader Code, GeoHot has now released his coveted PS3 hack so end-users can exploit their non-Slim PlayStation 3 Entertainment System!

Essentially what it does is modify the PS3's hypervisor adding two calls for reading/writing to all of the system memory.

To quote: "In the interest of openness, I've decided to release the exploit. Hopefully, this will ignite the PS3 scene, and you will organize and figure out how to use this to do practical things, like the iPhone when jailbreaks were first released. I have a life to get back to and can't keep working on this all day and night.

Please document your findings on the [Register or Login to view links]. They have been a great resource so far, and with the power this exploit gives, opens tons of new stuff to document. I'd like to see the missing HV calls filled in, nice memory maps, the boot chain better documented, and progress on a 3D GPU driver. And of course, the search for a software exploit.

[Register or Login to view links] is the coveted PS3 exploit, gives full memory access and therefore ring 0 access from OtherOS. Enjoy your hypervisor dumps. This is known to work with version 2.4.2 only, but I imagine it works on all current versions. Maybe later I'll write up [Register or Login to view links]

I've gotten confirmation the exploit works on 3.10. Also I've heard about compile issues on Fedora. I did this in Ubuntu.

Good luck!"

Usage Instructions:

Compile and run the kernel module.

When the "PRESS THE BUTTON IN THE MIDDLE OF THIS" comes on, pulse the line circled in the picture low for ~40ns.
Try this multiple times, I rigged an FPGA button to send the pulse.
Sometimes it kernel panics, sometimes it lv1 panics, but sometimes you get the exploit!!
If the module exits, you are now exploited.

This adds two new HV calls,
u64 lv1_peek(16)(u64 address)
void lv1_poke(20)(u64 address, u64 data)
which allow any access to real memory.

The PS3 is hacked, its your job to figure out something useful to do with it.

How it works:

geohot: well actually it's pretty simple
geohot: i allocate a piece of memory
geohot: using map_htab and write_htab, you can figure out the real address of the memory
geohot: which is a big win, and something the hv shouldn't allow
geohot: i fill the htab with tons of entries pointing to that piece of memory
geohot: and since i allocated it, i can map it read/write
geohot: then, i deallocate the memory
geohot: all those entries are set to invalid
geohot: well while it's setting entries invalid, i glitch the memory control bus
geohot: the cache writeback misses the memory
geohot: and i have entries allowing r/w to a piece of memory the hypervisor thinks is deallocated
geohot: then i create a virtual segment with the htab overlapping that piece of memory i have
geohot: write an entry into the virtual segment htab allowing r/w to the main segment htab
geohot: switch to virtual segment
geohot: write to main segment htab a r/w mapping of itself
geohot: switch back
geohot: PWNED
geohot: and would work if memory were encrypted or had ECC
geohot: the way i actually glitch the memory bus is really funny
geohot: i have a button on my FPGA board
geohot: that pulses low for 40ns
geohot: i set up the htab with the tons of entries
geohot: and spam press the button
geohot: right after i send the deallocate call

On the Isolated SPUs

Today I verified my theories about running the isolated SPUs as crypto engines. I believe that defeats the last technical argument against the PS3 being hacked.

In OtherOS, all 7 SPUs are idle. You can command an SPU (which I'll leave as an exercise to the reader) to load metldr, from that load the loader of your choice, and from that decrypt what you choose, everything from pkgs to selfs. Including those from future versions.

The PPU is higher on the control chain then the SPUs. Even if checks were to be added to, for example, verify the hypervisor before decrypting the kernel, with clever memory mappings you can hide your modified hypervisor.

Ah, but you still didn't get the Cell root key. And I/we never will. But it doesn't matter. For example, we don't have either the iPhone or PSP "root key". But I don't think anyone doubts the hackedness of those systems.

I wonder if any systems out there are actually secure?



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Comments 289 Comments - Go to Forum Thread »

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#264 - yellowsnow - 253w ago
yellowsnow's Avatar
Quote Originally Posted by flipside786 View Post
Would this work. Please take a look under "555/556 Astable". All you would have to do is adjust the resistors and capacitor values to output a 40 ns pulse.

[Register or Login to view links]

thank you, that's what i've been saying.. I also believe I made a working rig that will pulse for 63ns however I am having trouble soldering the rambus.

#263 - MysticMan - 253w ago
MysticMan's Avatar
Stated in the datasheets of every manufactor for the 555 Series (believe me, you can easily google them) the fastest switching time for a SE555 is 100ns. This is best case scenario. So this little sweet high speed counter is way out of business to switch in 40ns.

#262 - flipside786 - 253w ago
flipside786's Avatar
Would this work. Please take a look under "555/556 Astable". All you would have to do is adjust the resistors and capacitor values to output a 40 ns pulse.

[Register or Login to view links]

#261 - inginear - 253w ago
inginear's Avatar
here is an article describing how to use pwm with the arduino: [Register or Login to view links]

and here is a chip from sparkfun that has a 40ns period for internal pll logic: [Register or Login to view links]

i do not know if either is a viable source for the ps3 application as i am no electronic genius. i hope at least one of those links is useful.

#260 - dvbtr - 253w ago
dvbtr's Avatar
It's not gonna work with 555. It must be used with fast relay for grounding ram bus easily without pulsing high and there is no special relay which is working with in 40ns.

Anyway according to xorloser's SX28 solution high speed micro-controller can help us.

 

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