A Jailbreak For The iPhone 4S Could Be On The Horizon, But Don’t Upgrade To iOS 5.0.1

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A couple of days ago, security researcher Charlie Miller discovered a doozy of a bug in iOS 5’s Nitro Javascript engine that allowed any app to remotely download and execute malicious, system-level code on an iPhone.

Apple was pissed. So pissed, in fact, they kicked Miller out of the App Store and Developer Program within hours of his exploit becoming known.

While most of the aspects of this bug may seem pretty dire for users of Apple devices, especially those who can’t even trust App Store apps anymore, it is great news for jailbreakers. In fact, Miller’s bug may lead to a proper, untethered iOS 5 jailbreak for all iDevices, including the iPad 2 and new iPhone 4S.

According to jailbreak hacker pod2g, who has been working on an untethered iOS 5 jailbreak, Miller’s code signing exploit will make jailbreaking iOS 5 “dramatically easier.”

There’s a caveat, though. pod2g strongly recommends that when Apple releases iOS 5.0.1, jailbreakers shouldn’t update. Why? This code-signing bug is what would be considered an extremely high priority update for Apple to fix, and they are likely to close it ASAP.

That puts people who want to jailbreak their iPhone 4S in a pickle. iOS 5.0.1 is scheduled to have some big fixes to the way the 4S consumes power, which means if your new iPhone is having battery problems, you are going to have to choose between charging more often or jailbreaking your device.