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 about the vulnerabilities they found, the Keen team stated that Apple's OS X is difficult to exploit and the operating system overall is very secure.
"For Apple, the OS is regarded as very safe and has a very good security architecture," Keen team member Liang Chen said. "Even if you have a vulnerability, it’s very difficult to exploit. Today we demonstrated that with some advanced technology, the system is still able to be pwned. But in general, the security in OS X is higher than other operating systems."Apple representatives attended the contest and were made aware of the security exploits used in the contest. This isn't the first time Safari has been exploited during the contest. In 2011, a team of French security researchers compromised a MacBook by remotely running code within five seconds of contacting the machine.