Je vous en parlais la semaine dernière, le hacker GeoHot annonçait sur son blog qu'il avait cracké la Playstation3 ... Et bien il vient tout juste de publier l'exploit en question pour le plus grand bonheur de tous les autres hackers qui vont ainsi prendre le relai...

Il a demandé à la communauté qu'elle documente toutes ses trouvailles dans le Wiki psDev. L'exploit en question est téléchargeable ici avec les instructions.

geohot: well actually it's pretty simple
geohot: i allocate a piece of memory
geohot: using map_htab and write_htab, you can figure out the real address
of the memory
geohot: which is a big win, and something the hv shouldn't allow
geohot: i fill the htab with tons of entries pointing to that piece of
memory
geohot: and since i allocated it, i can map it read/write
geohot: then, i deallocate the memory
geohot: all those entries are set to invalid
geohot: well while it's setting entries invalid, i glitch the memory control
bus
geohot: the cache writeback misses the memory :)
geohot: and i have entries allowing r/w to a piece of memory the hypervisor
thinks is deallocated
geohot: then i create a virtual segment with the htab overlapping that piece
of memory i have
geohot: write an entry into the virtual segment htab allowing r/w to the main
segment htab
geohot: switch to virtual segment
geohot: write to main segment htab a r/w mapping of itself
geohot: switch back
geohot: PWNED
geohot: and would work if memory were encrypted or had ECC
geohot: the way i actually glitch the memory bus is really funny
geohot: i have a button on my FPGA board
geohot: that pulses low for 40ns
geohot: i set up the htab with the tons of entries
geohot: and spam press the button
geohot: right after i send the deallocate call

J'ai hâte de voir tout ce petit monde s'enflammer et inventer des centaines de choses à partir de ce hack, y compris des petites bidouilles ou des homebrews.

Si vous voulez plus d'infos, rendez vous sur le blog de GeoHot !

Encore merci à Prototux pour l'info