iOS 4 security flaw allows iPhone users to bypass lock screen | iLounge News


iOS 4 security flaw allows iPhone users to bypass lock screen

A MacRumors reader has identified a security flaw in iOS 4.1 that would allow users to bypass the iPhone lock screen. Attempting to place an emergency call to a non-emergency number and immediately pressing the sleep/wake button on the iPhone will open the Phone app, allowing the user to access contacts, call history, voicemail and call any number. The user will not be able to leave the Phone application and access other data on the device, and must either reboot the device or place and end another call to return to the normal lock screen. iLounge has confirmed that this issue exists in iOS 4.1 on all models of iPhone and have also received reports that the problem exists in at least some versions of iOS 4.0. Notably, John Gruber reports that the problem does not exist in iOS 4.2 beta 3, suggesting that Apple may have already identified and fixed the security flaw. Note that this issue does not affect the iPod touch as it has no Emergency Call feature.

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Strange that some people can’t reproduce the problem. I can’t on my iPhone 3G with iOS 4.1 installed.

Posted by Ted Wood in Toronto on October 26, 2010 at 10:28 AM (CDT)


There may be other factors involved, however we have been able to reproduce it easily on several iPhones of various models using iOS 4.1.

Posted by Jesse Hollington in Toronto on October 26, 2010 at 10:33 AM (CDT)


I was able to expolit this flaw on an iphone 4 with ios 4.1 installed.

Posted by Khaled in Toronto on October 26, 2010 at 2:42 PM (CDT)


Just tried it.  Immidiately pressing the lock button after taping the phone icon, i easily reproduced the results

Posted by miles po in Toronto on October 26, 2010 at 2:43 PM (CDT)

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