Sony confirms 2.0 TIFF exploit as "security threat," to patch
Hardware Expect a new version of PSP firmware in the near future, and don't expect the TIFF image exploit to work anymore either. Following the PSPupdates article, Secunia, a software security team, has confirmed hackers may be able to exploit the buffer overflow and gain access to your system software. I know you're quaking in fear.
Sony's response? "This won't happen with normal use, but we have confirmed that under special circumstances, the security hole can be exploited." They are reportedly currently working on a fix for the hole, to be included in the next PSP firmware update.
So: if you want to keep your ability to downgrade, don't upgrade to the upcoming version of PSP firmware. It's that simple. I suspect Sony will do away with TIFF support entirely; the format is rarely used for consumer applications.
Source : http://www.psp-vault.com/
P.S.: Snif moi qui viens juste de renvoyé il y a quelques jours ma PSP chez SONY pour un échange vu le nombre de pixels défectueux que j'avais et bien s'il me l'a rendent avec leur nouveau firmware je n'aurais même pas pu goûter au joie des homebrew et autres émulateurs.