Apple's iOS Updates Kill Only iPad 2 Jailbreak
July 18, 2011 8:45 AM
comment(s) - last by
(Source: Pinoy Tutorial)
The new update conveniently blocks the only route of jailbreaking to the iPad 2.
OS update also closes a significant security hole
Jailbreaking phones -- removing operating system makers' restrictions on things like OS themes and allowed programs -- is today
Library of Congress
amendments to the
Digital Millennium Copyright Act
[PDF] (DMCA). But just because it's legal to jailbreak, doesn't mean Apple, Inc. (
) will allow it.
Apple argued unsuccessfully to the U.S. government that jailbreaking could allow
terrorists to turn their iPhones into digital weapons
, and could assist drug dealers. Apple refuses to give users an open path to jailbreaking their phones, so users are forced to discover exploits that allow unauthorized code to be run. This is very convenient for Apple as it can justify closing the jailbreak route as a "security fix".
Thus is the case with iOS 4.3.4. The updates' only real action is to fix the mishandling of fonts in PDF files, which previously allowed for jailbreaking -- or malicious code execution.
Users can find the update here, for various devices:
iPhone 4 (GSM)
iPad 2 WiFi
iPad 2 GSM
iPad 2 CDMA
iPod touch 3G
iPod touch 4G
The update is significant as it cripples JailbreakMe 3.0, currently
the only way to jailbreak
Apple's new iPad 2 tablet. Jailbreaks are generally divided into boot-related jailbreaks and injection jailbreaks. Thus far no boot-level jailbreaks work on the iPad 2, due to its new A5 dual-core CPU. And the only injection-based jailbreaks currently in action relied on the PDF exploit.
The original iPad and present iPhone lineup is still jailbreakable via boot-level jailbreaks, such as redsn0w, PwnageTool and sn0wbreeze. There's little Apple can do to prevent these jailbreak routes, much to chief executive Steven P. Jobs chagrin. Mr. Jobs has expressed a
strong dislike for jailbreakers
in past interviews.
While Apple can claim the recent update was to "protect" users, in reality it will only add additional safety to the most careless of users. After all, a program called "PDF Patcher 2" was widely available via the Cydia app store and other sources. The PDF Patcher 2 does pretty much the exact same thing as iOS 4.3.4, but does so
the user has jailbroken.
It is presumable that most users who are knowledgeable enough to jailbreak in the first place would properly protect their phones against malicious code by adding the patch post-jailbreak, especially since the
instructs the user to do so.
So it looks like Apple has won this round. One of its devices is yet again unjailbreakable -- at least for now.
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RE: It's futile to try and stop jailbreakers
7/20/2011 8:20:17 AM
Another big reason for closing these holes is to protect developers and content owners. Jailbreaking does free you up to do anything you want (within reason) on the device but also opens the way to download pirated apps and to rip streamed content from services like iPlayer. This is one reason why Channel 4 in the UK didn't release it's streaming player app on the iPhone I recall but did release it on the iPad! Developers would soon get cheessed off with the iOS platform if their revenues took a bigger dip due to piracy, so Apple is prtecting itself in this sense...
"It looks like the iPhone 4 might be their Vista, and I'm okay with that." -- Microsoft COO Kevin Turner
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