Every year for the past seven years, hackers have gathered at the annual PWN2OWN event to hack high-profile software and mobile devices using previously unknown vulnerabilities. Apple's Safari browser and iOS platform are often included in the annual contest, which also targets Internet Explorer, Chrome, Firefox, and Adobe's Flash and Reader applications. This year, Safari was taken down on day two by a team of vulnerability researchers and exploit developers from China, reports ThreatPost. China's Keen team exploited two vulnerabilities that allowed the team to execute arbitrary code using a Safari WebKit flaw and circumvent Apple's sandbox via an OS X system-level vulnerability. Speaking a