Stefan Esser is a security researcher and spent most of his time with PHP. Later he came to jailbreaking community. He was the person who developed exploits for iOS 4.3.1 / 4.3.2 / 4.3.3 untethered jailbreak. He gave his exploits to iPhone Dev Team who packaged these exploits behind their Redsn0w to release jailbreak for the public.
Later Comex released his JailbreakMe 3.0 for iPad 2 jailbreak on iOS 4.3.3. Although iOS 5 was in its beta at that time, Apple was quick enough to release another version of iOS 4 series that is iOS 4.3.4 to patch vulnerability found by Comex. Later Apple released another version iOS 4.3.5.
A lot of people are still using iOS 4.3.5. But no one cared for its untethered jailbreak because iOS 5 was in beta at that time already. So developers were focused on iOS 5.
In a tweet, Stefan Esser as known as i0nic on Twitter has shown intention to work on iOS 4.3.5 untethered jailbreak.
Well a great news of course. But who will use it ? There is in fact no need for iOS 4.3.5 untethered jailbreak. The reason is very simple. In a few days, iOS 5.0 / 5.0.1 untethered jailbreak will be released in the form of Greenpois0n by Chronic Dev Team originally developed by Pod2g.
We would also like to mention that this can be a joke as well. Stefan Esser is known to be a person who teases his followers by making such announcements. Earlier he created a drama of iPad 2 jailbreak in the form of some Elevator. So do not get serious and start expecting iOS 4.3.5 untethered jailbreak until he shows some proof. Remember seeing is believing. Also there is no need of it as we are expecting Greenpois0n iOS 5.0.1 from Chronic Dev Team.
You can read more about Stefan Esser by following these link: Stefan Esser Interview and iOS Kernel Exploiting – A Presentation by Stefan Esser.
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