iPhone 5 is vulnerable to the same attack that successfully breached an iPhone 4S at the mobile Pwn2Own hacker contest held this week. The same bug is present in the iOS6 Golden Master development code base. The duo won $30,000 for their efforts at the EUSecWest event in Amsterdam. Apple’s vaunted security of the iPhone (4S) took an epic fail tumble during the event when they was able to build an exploit for a vulnerability in WebKit to beat Apple’s code-signing features.
Source: https://thehackernews.com/2012/09/iphone-5-and-4-hacked-with-same-exploit.html