More Info about the New 2.5 Exploit

[wraggster]

Heres more details, make of them what you will:

OK to end fear of the Exploit Here are the inner workings

Tradional PBP and SAVEGAME Layout
-ULUS100xxxx or EBOOT
--Param.SFO (tells how the psp handles the file: e.g. title - update ver. 2.51)
--icon0.PNG (icon)
--icon1.PMF (almost like a short movie clip <500kb
--pic1.PNG (background for pile that appears when you look at the file)
--SND0 (background sound-not in most saves or EBOOTs)
--Data file/data.psp (name vary depending on game saves...data.psp is the name when in eboots)
--Data.psar(only in eboots)

Well my Exploit contains...
--Param.SFO (tells how the psp handles the file: e.g. title - update ver. 2.51)
--icon0.PNG (icon-overflow.tif)
--icon1.PMF (blank PMF found in iso rip kits)
--pic1.PNG (background for file-framebuffer)
--SND0.AT3 ( small randow sound clip)
--Data file/data.psp (from v1.5)
--Data.psar(from v1.5)
and...
--Pic0.PNG (overflow.tif)

My Original Idea For The Exploit
1)the icon0 would be set to the overflow.tif
2)pic1 the framebuffer image
3)the 2 data files as 1.50s data files
4)SND0.AT3 a music file >20mb
5)ICON1 the blank pmf found in iso rip kits
6)Param file set to be read as updater version 2.51
7)pic0 overflow.tif resized to 272x480

Only one thing from my original blueprint wasn't used : the AT3 file is 5kb

How This Works
This works by overloading the psp audio with a glitch sound, and overloading the image handler with overflow.tif, thus in conjuction overriding the TIF patch.

Does that mean much to you ?

[Insane1]

So...overloading two things to allow for the exploit?

[vincesecuricor2005]

ok so this basically sets the path for a downgrader pretty cool, and well appreciated but what im personally lookin for is havin homebrew etc.... livin in harmony with the latest f/w versions, still job well done though geezers

[vichhaykhiev]

here fw 3.00
http://s47.yousendit.com/d.aspx?id=1...D3N2360G24AWMK

sry..... don't blame.......

[F9zDark]

What does this file have to do with anything? This is the second time you have posted this file that I have seen, again with the 'do not blame' message. Just because you are 14 doesn't exonerate you from all harm. Unless you have personally tried this file on your PSP, do not upload it here...

Had you worked hard to buy your PSP rather than get it from mommy you'd have a little more sense than to be sharing links to files that no one has any clue about that could essentially ruin their PSPs...

Anyway, back on topic, I hope to hear some more news of this soon. Not that I'd ever upgrade to 2.50, but it would be great to have all our doors open in other firmwares.

[vincesecuricor2005]

and hopefully not jus for downgradin

[YourStillWithMe]

I appreciate what is being done but we don't need a downgrader. We have to try to keep up with these stupid firmware updates I know were gonna have to update sooner or later. . . . .

[jimjamjahaa]

well until they release a firmware with a new feature that can be exploited as much as we need for homebrew, i would say a downgrader is exactly what we need

[vincesecuricor2005]

agreed i dont wanna have to keep up/down grading all the time it feels too dodgy id rather have my cake and eat it lol

[F9zDark]

Having downgraders that work are a plus though. For people buying a new PSP having the ability to downgrade it makes it much better for them in the long run. Granted I want to be able to run homebrew like I can on my 1.0 on all firmwares, but that wont happen anytime soon.

2.0 is getting much better homebrew development and will probably remain that way for some time. But for those who buy PSPs now, that are shipping with 2.50 it would be nice to get back to 2.0 and be able play homebrew and some of the newer games.