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PS3 Lv0ldr / Bootldr Exploit Reverse-Engineering Details by Naehrwert

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95w 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):

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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 »

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nintendo1516's Avatar
#229 - nintendo1516 - 77w ago
very cool news

PS3 News's Avatar
#228 - PS3 News - 82w ago
Here are some more purported PS3 keys for Firmware 4.31 from MARKUS++: pastebin.com/raw.php?i=zsQzfm7R

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Also below are unconfirmed PS3 RSA KEYS from haleskinn and via pastebin.com/rwapY2Ng:

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phuqt's Avatar
#227 - phuqt - 90w ago
What are these keys?

cfwmark's Avatar
#226 - cfwmark - 90w ago

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FILE NAME: ps3key.txt

yllan's Avatar
#225 - yllan - 91w ago
goodnight, here are some file which could be used for development a check

3.60 CEX - LV1 Embedded Files (Twitter: UpSilon_Y)

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Can you look if it please, thank you: [Register or Login to view links]

source: logic-sunrise.com

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