Team Molecule's Henkaku challenge was a great way to
Since the F00D processor was updated only once on firmware 1.60, hexkyz decided to get a Vita with a firmware at least lower than 1.60 in case some critical lv0 bugs were patched there. Fortunately he managed to get a firmware 1.50 Vita. From there the real fun began.
Basically, while he was able to achieve everything what Henkaku does on firmware 1.50, in the end, he went even further than Henkaku and achieved arbitrary lv1 code execution on firmware 1.50. So what does this mean for the average dude? Since the vulnerability he found was patched around firmware 1.80, nothing. At least for now. Still this is useful for hackers with a low firmware Vita who want to help hack the system even further.
Currently, hexkyz is fuzzing with the main interface of the F00D processor on firmware 1.50, while looking for new lv1 vulnerabilities for firmware 3.60. And who knows, maybe from all of that, someday the system will be hacked further on 3.60 or even 3.63. Visit hexkyz's blog to read the full post with all the details.
Source: hexkyz's blog via Yifan Lu's Retweet