Though the issue was nominally fixed with iOS 9.3, the "1970" date bug can theoretically be used to intentionally brick any pre-iOS 9.3.1 device, according to a pair of security researchers.
Source: APPLE INSIDER
'1970' date bug could be used to wreck pre-iOS 9.3.1 devices over Wi-Fi, researchers say
ByA Word From Our Sponsor
Apr 13, 2016