Revealed: Chrome Really Was Exploited At Pwnium 2013
Freshly Exhumed writes with an "inconvenient truth" as reported at Internet News: "Google Chrome running Chrome OS was hailed as being a survivor in the Pwnium/Pwn2own event that hacked IE, Firefox and Chrome browsers on Windows. Apple's Safari running on Mac OS X was not hacked and neither (apparently) was Chrome on Chrome OS. Google disclosed [Monday] morning that Chrome on Chrome OS had in fact been exploited — albeit, unreliably. The same researcher that took Google's money last year for exploiting Chrome, known publicly only as 'PinkiePie' was awarded $40,000 for exploiting Chrome/Chrome OS via a Linux kernel bug, config file error and a video parsing flaw." Asks Freshly Exhumed: "So, was it really Google Chrome, or was Linux to blame?"
Wasn't it both? They're both a component in the same vector.
I would argue that if the bug is exploitable in non-ChromeOS kernels then Linux is to blame. If the bug was introduced by the ChromeOS implementation, then it's the fault of ChromeOS.
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You don't seem to understand how Pwn2Own works. People don't arrive at the contest, pick an OS/Browser and then start looking for an exploit.
They begin weeks in advance looking for exploits. IF they find one, then they go to the contest and select the appropriate platform and demonstrate the exploit. Their demonstration may fail, because the versions of the software on the contest platform might be different from what they were practicing with.
That no one "attempted to hack" OSX and Safari at the competition this year is because in the past few weeks of trying, no one has found an exploit for it. It's certainly not the case that they could have won the prize, but couldn't be bothered.