Exploit with gamepicture possible in 2.82?

[CrazyT]

Today i tested a bit around with my psp with FW 2.82 and found out that you can define any size for your game-icon-picture.
A size of 4095*1023 (and some other sizes,too) produces a hanging of your psp.
(sometimes you can not even poweroff your psp ... only restart it by removing the akku)
Just thought the information can be helpful, because some people search for a possible exploit for 2.82 ... so maybe this is one possible way.
I attached the file that i used for testing ...
(this attachement is no downgrader or something like that it JUST PRODUCES A CRASH OF YOUR PSP ... it is only for exploit-devs that know how to work with bufferoverflows & co., unfortunately i have no tools on my psp to see if it is really a bof ... that's why i posted that, so that other people could check that)

[splodger15]

I think it crashed due to the fact the image was to big

[CrazyT]

I know that the size is too big ...
But i do not know if this is because of a bufferoverflow or because of an out-of-memory-error.
But there are people out there that have the tools to test that.
(a bufferoverflow could be helpful because you can mostly run code with that)

[hawke213x]

Hmmm....lets hope.

[CrazyT]

some things are evidences that it could be a bof ...
for example it does not depend on the number of games that are already installed.
(wich means ... it is maybe no out of memory error because a size smaller than the 1 given in the image never crashes ... but the size of the given image allways crashes ... no matter how many games are installed (more games -> more pictures to load))
2nd thing is that it does just depend on the visible size of the image not on the disk-space(no matter what image tool you use, it allways crashes on that (and some other) size)

PS:I wonder how Dark_Alex managed it to create an exploit without beeing able to use debug-tools :/ .

[splodger15]

PS:I wonder how Dark_Alex managed it to create an exploit without beeing able to use debug-tools :/ .

Its called Coding.Quite a few people know how to do it

[CrazyT]

Its called Coding.Quite a few people know how to do it

wow ... you are a genius ... how to make a prog work on a psp that does not have homebrew and does not support it, because you need tools to make homebrew work rofl.

[dejkirkby]

CrazyT, what's the point in arguing with a coder when, by your post, it seems you have very little knowledge of what you are talking about.

[splodger15]

, because you need tools to make homebrew work.

LOL you need Cygwin installed and coding knowlegde.

What kind of tools do you mean.

What like a hammer and screwdriver

[CrazyT]

-_- cos im a coder ,too
but no psp-coder
just for interest ... im a delphi,vb and assembler programmer.
(mostly wrote trainers and other stuff for games)
With tools i mean programs like debuggers ... to get the knowledge of the reason of an error.
(like offset adress, type of error,etc.)