One of the core team members of the Pangu Jailbreak Team, a.k.a. windknown, has just posted a technical article explaining the security and vulnerability fixes in iOS 9.2 and iOS 9.2.1.
There are tons of technical details discussing on specific kernel exploits and race condition bug in iOS 9.2 that can be used to jailbreak the operating system, that you may wish to check out if interested. Worth mentioning is that at the end of the article, a specific note was made by the hacker, that:
A rough translation: it is noteworthy that this vulnerability can be triggered in the iOS sandbox, so it can attack the kernel right from the app to obtain the kernel code execution permission. We recommend that users upgrade to the latest version as soon as possible, and avoid installing apps from unknown sources.
This invites speculations whether or not this is a hint to users should update their devices . But meanwhile, iOS hacker Luca Todesco (a.k.a @qwertyoruip) also tweeted to respond to windknown that iOS 9.2 and below are vulnerable to major kernel bug that leads to security loopholes to the device. His suggestion is:
By the way I agree with @windknown 100% re. p0 bugs. Update to 9.2.1 if you don’t care about jailbreak. Stick on 9.2 if you do.
— qwertyoruiop (@qwertyoruiop) February 2, 2016
It appears to be clear that if you still want to jailbreak, stay with iOS 9.2 is a better choice. But if care about iOS security, update to the latest iOS 9.2.1. But what’s your take to the statement from windknown and Luca? Let me know in the comments.
Source: Pangu Blog