Sponsored Links

Sponsored Links

PS3 Lv0ldr / Bootldr Exploit Reverse-Engineering Details by Naehrwert


Sponsored Links
97w ago - Following up on the previous PS3 Lv0ldr / Bootldr clarifications by marcan42 and wololo, today PlayStation 3 hacker naehrwert has shared some details based on reverse-engineering the exploit used to dump it.

To quote from his blog: The Exploit

As the exploit that was used to dump lv0ldr/bootldr/howeveryouliketocallit is public now, let's have a closer look at it to understand what's going on. Here is what I have reversed from lv0 (it shares the syscon portion of the code with its SPU counterpart):

[Register or Login to view code]

The syscon library implements some high level functions, e.g. to shutdown the console on panic or to read certain configuration values. Every of this functions internally uses another function to exchange packets with syscon and the exchange function uses the read_cmpl_msg one to get the answer packet. The top-level function will pass a fixed size buffer to the exchange function.

So if we are able to control syscon packets, e.g. by emulating MMIO (and thanks to IBM we are), we can change the packet size between the two packet readings and overwrite the caller stack. And if we first copy a little stub to shared LS and let the return address point to it, we can easily dump the whole 256 kB.

Nothing more left to say now, let's wait and see if this is going to be fixed in future firmware versions (we just have to check lv0 fortunately).




Stay tuned for more PS3 Hacks and PS3 CFW news, follow us on Twitter and be sure to drop by the PS3 Hacks and PS3 Custom Firmware Forums for the latest PlayStation 3 scene updates and homebrew releases!

Comments 244 Comments - Go to Forum Thread »

• Please Register at PS3News.com or Login to make comments on Site News articles. Thanks!

romhunter's Avatar
#204 - romhunter - 100w ago
Hi. Some of my WIP and app key files for testing. Bye

Foo's Avatar
#203 - Foo - 100w ago
Yeah the lv2diag files look like legit files but they don't work.

Gaarasaiyan's Avatar
#202 - Gaarasaiyan - 100w ago
I'm just waiting for when I don't have to downgrade to 3.55 to install a CFW. I miss my CFW but I don't want to have to downgrade to install it I just want to be able to install a CFW over the current OFW. Maybe one day...

mistarz's Avatar
#201 - mistarz - 100w ago
Well.. to be proper and simple. NOTHING.

M

miki2o's Avatar
#200 - miki2o - 100w ago
What can we do with this PS3 Downgrade 3.60++ (Lv2diag.421.self) ? Thanks I haven't understood the IRC conversation...

Sponsored Links

Sponsored Links
Sponsored Links

Sponsored Links







Advertising - Affiliates - Contact Us - PS3 Downloads - Privacy Statement - Site Rules - Top - © 2014 PlayStation 3 News