Two teams of Chinese and Japanese hackers demonstrated the exploitation of zero-day vulnerability in Apples Safari browser for the iPhone 5 running iOS 6 and iOS 7 and the Samsung Galaxy S4. Japanese Team MBSD, of Mitsui Bussan Secure Directions, Inc. won $40,000 reward for zero day exploit. The Pwn2Own contest is organized is to attract hackers into legitimate circles trying to keep them out of the black market. The attack allowed hackers to gain system-level privileges on the device.”]
Source: http://securityaffairs.co/wordpress/19723/hacking/pwn2own-2013-contest.html