Google has pushed out a patch for the second full sandbox escape exploit used in the Pwnium contest at CanSecWest. The Chrome vulnerabilities that the exploit targeted were discovered by an anonymous researcher who used the name PinkiePie and claimed a $60,000 reward from Google. The attack that the researcher used included three separate vulnerabilities which he was able to string together to compromise Chrome. Google officials said they were happy with the results of the contest, which attracted two full sandbox escapes in Chrome.
Source: https://threatpost.com/google-fixes-second-set-chrome-bugs-used-pwnium-contest-031212/76314/