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Critical iPhone Security Bug Lets You Bypass Passcode Lock and then Make Phone Calls, Send e-Mail and Share your Contacts, MMS as well

October 25th, 2010

Critical iPhone Security Bug Lets You Bypass Passcode Lock

A new security bug has been found in iOS 4.1 that lets you bypass an iPhone’s passcode lock to make calls and access contact information.

You will also be able to gain email access and of course send and receive emails, MMS Sharing will be exposed as well so the anybody who knows this trick can now bypass this Lock and gain access to your information.

If you want to try it out on your iPhone then here are the steps on how to get this accomplished on your device.

Instructions to Reproduce:
● Lock your iPhone using a passcode
● Press Emergency Call
● Dial a non existant number #123456 (Any # + number will work)
● Immediately press the Power button “twice” as it begins making the call

After performing these steps the contacts application will open giving you access to the entire address book, recent call history, and voicemail of the person’s iPhone.

Critical iPhone Security Bug Lets You Bypass Passcode Lock Critical iPhone Security Bug Lets You Bypass Passcode Lock

You can also make calls and send emails. People at Macstories have also noticed: that while in this “forced Phone.app mode” you can’t go back to the homescreen but you can invoke the multitasking tray, even if tapping on apps won’t work. I was able to make SBSettings (jailbreak required) appear, but it didn’t work either. To return to the lockscreen from this forced mode, start a new call and end it.

The Field Test application won’t start either in the “protected mode”, but you’ll be able to gain email access. Tap on a contact, then “share contact” and boom – you can send an email. As you can guess, email access exposes all your configured email address and contacts. MMS sharing works as well.

This hack was found by @abrahamvegh and then appeared on MacRumors and was detailed on video by MacMagazine (Brazilian)

Apple has reportedly been notified of the security bug already.

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