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PS3 LV2_Kernel Exploit Sample Implementation By Naehrwert


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118w ago - Following up on his PS3 SCETool update and PS3 Dump_Rootkey code, today Sony PlayStation 3 hacker Naehrwert has posted some details on exploiting the PlayStation 3 lv2_kernel and has made available a sample 3.41 implementation below.

To quote from his blog: Exploiting (?) lv2

A long while ago KaKaRoTo pointed me to a stack overflow he found while reversing lv2_kernel. But there are two problems:

1. The vulnerability is in a protected syscall (the SELF calling it got to have the 0x40... control flags set). So you’d first need to find a suitable usermode exploit (don’t ask us), that gives you code execution with the right privileges.

2. The payload data is copied to lv2 heap first and the function will do a free call on it before the payload has any chance to get executed. This might not sound like a problem but it looks like lv2′s heap implementation will overwrite the free’ed space with 0xABADCAFE and thus destroy the payload.

Here (pastie.org/4755699) is my sample implementation for 3.41 lv2_kernel (although the vulnerability should be present in all versions of lv2 up to the latest firmware), maybe someone of you will find a way to overcome problem (2.) and can get something nice out of it because right now it’s only good to crash lv2.

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From Mathieulh (via pastebin.com/naxXkv3M):

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The footer signature is still not checked upon npdrm self files execution as of 4.21.

Because kakaroto says something that doesn't make it true. Basically he found a check in 3.55 that was not even called and assumed they used it in 3.60+.

Of course they do whitelist npdrm now so even if the footer isn't checked you cannot run your own npdrm selfs signed with keyset lower than 0x0D making the whole debate rather pointless. Aditional checks are now performed on the actual file format as well such as the segment counter flag that needs to be set to 0x01 except for the very last segment.

Finally, from KDSBest (via twitlonger.com/show/jcmh80): Since naehrwert posted an lv2 exploit I will do so too . The stack pointer points to lv2 and if we do a syscall, the syscall saves register to the stack HAHA.

Btw. It just crashes the console for now, since I totally overwrite dump the lv2 or some memory addresses I don't know. Feel free to try around, adjust the address of the stackpointer and so on. If you managed to get the panic payload executed. Tell me!!! ^^

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I didn't managed to make it work on 4.21 so I just did on 4.20






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Comments 273 Comments - Go to Forum Thread »

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#233 - BerserkLeon - 35w ago
BerserkLeon's Avatar
Try a 0byte file? Exception.

scratch my last comment, here i was assuming that [klic] was text entry instead of a file read operation.

klic's 32 0's: [Register or Login to view links]

oh silly me, I uploaded the wrong one. Oh well, it has the same properties as the bgm0000002 one, free and edat v4. same error.

... Well now I feel stupid. The error was because I opened it in notepad++ and typed 32 0s.
klic is to be read from a file that is compiled with a hex editor. So I opened HxD and wrote one line of 0s, and now it works.
Brilliant. Another PEBKAC, I think I should think and do a bit more trial and error before typing.
Much thanks to User and Belmodo, I've been obsessing over this most of the weekend.

#232 - PS3 News - 35w ago
PS3 News's Avatar
Today PlayStation 3 developers user and Belmodo have made available NPDTool PS3 EDAT / SDAT Tool v4 Final with the changes outlined below.

Download: [Register or Login to view links] / [Register or Login to view links] / [Register or Login to view links]

To quote: Hi, Belmondo and me thought it would be time to just drop this here.

Enjoy

PS: extracting compressed edat/sdat is supported, creating isn't. However, you can finalize compressed debug edat/sdat.

Edit: ofc creating and extracting uncompressed edat works as well... let me know if there are any issues. it works with every file i tried.

Credits: JuanNadie

Previous Revisions:

Update 4d:

  • decompression fix

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#231 - thegrillisreal - 42w ago
thegrillisreal's Avatar
StanSmith: ...Really, bruh? For someone so SMART, that sure was something DUMB to say.

There are no such things as stupid questions. If a person does not know or is not familiar with patching or is new to custom firmware, then they have a right to ask someone SMART about whether a game works. That's what the ps3/ps4 forums are here for (In case you've forgotten, which it seems like you have.)

I am not going to lie. Sometimes, it gets annoying answering the same question over and over. I used to moderate a group concerning 3.55 firmware and I worked with others who did not understand all the programs well. (Get this--even I don't know how to use all the programs!)

But, you know what? I'm going to ask for help, instead of doing things on my own and end up messing my junk up and then have to go out and buy a new console.

Case in point: SMART people ask questions. Case closed.

#230 - StanSmith - 42w ago
StanSmith's Avatar
EVERYONE with a CFW that plays backups NEEDS these programs.

If everyone had these there would be no stupid questions like "Does this work on x.xx CFW?" Instead they would patch it themselves and find out if it works or not.

And by now every new game is coded for 4.50 or higher so everyone should also stop the stupid questions "does this work on 3.55?" IF COURSE NOT! Its not encoded for 3.55 so why would it work on 3.55?

Just upgrade to a newer CFW where the games do work on. If your on a lower CFW like Cobra 4.46 then you need to patch games so you use these programs. If your on 4.50 or above CFW then you dont need these as they already work.

It all comes down to how dumb you are. If your stupid you wont get these apps and you will ask stupid questions all the time and still be on stupid low CFW. If your smart you will be on a higher CFW and have these programs to help you out if you ever need to patch your games and you wont ask stupid questions filling up forums with stupid questions and repeated answers.

Just my 2 cents why you need these programs. They are really simple to use and really fast. By the time you load up your browser, loaded up the forum, asked the question, waited for an answer, replied you could already be playing your game.

#229 - PS3 News - 42w ago
PS3 News's Avatar
Following up on his previous updates, today PlayStation 3 developer JjKkYu has released TrueAncestor EDAT Rebuilder v1.45b followed by v1.45c and a PS3 ISO Rebuilder by jonnysp with the changes outlined below.

Download: [Register or Login to view links] / [Register or Login to view links] / [Register or Login to view links] by Ada Love Lace / [Register or Login to view links] by jonnysp

Version b for v1.45, just make some secret function to public.

Changelog v1.45b:

1. Batch mode and compress support is opened to public.
2. Klic Bruteforcer is updated to v2.1.

Update: Sorry for everyone, I've made a big mistake in this version. I will give a fix version soon.

Changelog v1.45c:

1. Fix some silly issues.
2. To launch the c version, please run rebuilder-c.exe.

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