A forum member over at ModMyI is claiming that he was unable to jailbreak his iPad that he recently bought using RedSn0w. This has led many to believe that Apple might have patched the limera1n exploit that has been used in Redsn0w to jailbreak iOS 4.2.1 in newer iPhones, iPads, and iPod Touches that are being shipped.

To give some of you some background info, back in October, GeoHot released a jailbreaking tool called Limera1n to jailbreak iOS 4.1 using a bootrom exploit. Since it was a bootrom (hardware level) exploit, it meant that Apple couldn’t stop the exploit from being used in existing iDevices to prevent them from being jailbroken but could do so in newe devices by patching the bootrom exploit. The ModMyi’s forum member believes that Apple has done just that and patched the exploit in newer iDevices. He wrote:

I made a trip to the Apple Store today to get an iPad for my old lady (Christmas present). She told me she’d love it jailbroken, so I sat down in front of my computer to redsn0w this 4.2.1 iPad. One problem–redsn0w 0.9.6b6 could not upload a pwned iBSS (hanged at the white screen on OS X, upload timed out and rebooted into jailed state with Windows). Furthermore, the device constantly stalls when attempting to dump its bootrom. This leads me to believe the injection vector used via USB has been patched in DFU mode. Case in point: Any iOS device with a serial number xx050 (this week) or higher might be unable to be jailbroken via the limera1n exploit. Slightly older devices may be invulnerable as well.

You can check if your iPhone, iPad, or iPod Touch is jailbreakable using the limera1n exploit by checking your serial number to find out which week your iPhone was manufactured. To check this from the serial number go to the Settings App -> General -> About -> Serial Number. The first two digits of the serial number tells you the factory ID of where it was manufactured and the next three digits (Digits 3-4-5) tells you when it was manufactured. An example would be: xx050xxxxxx – the 0 means 2010, and the 50 is the week of 2010 that it was manufactured.

According to the speculations, the new iPhone, iPod Touch, and iPad manufactured from the 50th week of 2010 might come with an updated bootrom. It won’t be the first time Apple has done it to try and gain a leg up in the never-ending cat and mouse game with the iPhone jailbreak community. This was also seen in October last year when Apple had started shipping the iPhone 3GS with the newer bootrom to prevent jailbreaking. Please note that these are still speculations at this stage. We will keep you updated with any further information and a confirmation from the iPhone Dev Team. Stay tuned by following us on Twitter and/or subscribing to our RSS feed.

[Source: ModMyI, Redmond Pie]

Authors: _GadgetNews

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