Bypass Lock Screen

scottreeddev · Mar 25, 2013

I'm not sure if anyone noticed this but I stumbled across this at the end of last weekend. It's quite simple to bypass any lock screen on the XPeria Z, I emailed Sony but no response so it's probably something we should be aware of.

I can't post a link but I have put a video up on my website scottreed.eu

Dsteppa · Mar 25, 2013

scottreeddev said:
I'm not sure if anyone noticed this but I stumbled across this at the end of last weekend. It's quite simple to bypass any lock screen on the XPeria Z, I emailed Sony but no response so it's probably something we should be aware of.

I can't post a link but I have put a video up on my website scottreed.eu

http://www.youtube.com/watch?feature=player_embedded&v=LLq1gxIt5YQ

Edit:
Another way to get Sony's attention would be if everyone hit that "Tip us?" button on the top right. If the issue got even more attention the chances would become bigger that Sony fixes this issue faster.

scottreeddev · Mar 25, 2013

Thanks for posting the direct link :good:

Dannyada1988 · Mar 25, 2013

Maybe we can install some security app to stop the easily bypass.

oranglewat · Mar 25, 2013

Ooooh snap! Works on my phone.

My phone is rooted. So maybe it works only on rooted phones? I'm using the latest firmware (434)

Edit:
Ok gave it several tries.

When you use the exploit, the phone won't lock again till you restart or change the lock screen.

Can anybody else confirm this?

scottreeddev · Mar 25, 2013

LiveSquare said:
Have you tried that? I'm running .434 firmware and I can't simulate that. When I click on the NFC, I'm back to the PIN screen.

The device I found it on is the following

Model: C6603
Android: 4.1.2
Kernel: 3.4.0-g298631f001992-g95474bcBuildUser@BuildHost))#1 SMT PREEMPT Sun Jan 15:30:38 2013
Build Number: 10.1.A.1.350

scottreeddev · Mar 25, 2013

oranglewat said:
Ooooh snap! Works on my phone.

My phone is rooted. So maybe it works only on rooted phones? I'm using the latest firmware.

Edit:
Ok gave it several tries.

If you have the pattern, password or face lock, this will work. But it doesn't work if you use pin lock.

When you use the exploit, the phone won't lock again till you restart or change the lock screen.

So for the time being, use the pin lock.

Can anybody else confirm this?

It works for me with PIN. One important thing I've noticed when showing this to people is once you've done it once I seems to screw up the locking. Once you've done it the lock button then doesn't show the security screen and if you press home it will. Also once you've done it once you have to force close all of the test windows and actually unlock your phone by press home then unlocking, It's quite wierd what happens after

scottreeddev · Mar 25, 2013

Another thing is when I first found this it was on one of the other service tests, I think maybe wifi but the NFC was the easiest one I found so it may be possible to activate it in other ways.

As said in a reply once you have done the exploit you must do the following to get it back to non-exploit state

Press the home button
Unlock your phone normally
Preset the task management button
clear all of the service test windows

oranglewat · Mar 25, 2013

You're right, works with PIN also.

Hope Sony update the firmware soon.

mcchin · Mar 25, 2013

Non rooted unit here. Updated to 434 and can replicate the problem

Hope get fixed in updates soon...

Thaevil0ne · Mar 25, 2013

Works here like a charm, unlocked rooted and on stock release ROM.
I laughed great find!

Also note: you can use any of the mini apps without using the nfc diag.

PS: Does this work on any Sony phone that contains the sevice menu?

Kind regards, Stefan.

chongbh · Mar 25, 2013

Does this happen to the Xperia Z with .434 stock ROM? I have tried on the pin lock but it will not unlock even though I key in any numbers or the OK button.

Dsteppa · Mar 25, 2013

People if the exploit is working for you, hit the "Tip us" button to get Sony's attention faster.

Aniket · Mar 25, 2013

This issue is also present in 2012 Xperia smartphones. Tried it on XP and XS and was able to bypass lockscreen.

Sent from my Xperia S using xda premium

AndroidGyan · Mar 25, 2013

Method doesn't work on my Xperia SL

mirajkar.aniket232 said:
This issue is also present in 2012 Xperia smartphones. Tried it on XP and XS and was able to bypass lockscreen.

Sent from my Xperia S using xda premium

Did you perform the same steps on your Xperia S, as mentioned for Xperia Z, as I also did and was not able to get it on my Xperia SL

Aniket · Mar 25, 2013

AndroidGyan said:
Did you perform the same steps on your Xperia S, as mentioned for Xperia Z, as I also did and was not able to get it on my Xperia SL

Yep same steps

Sent from my Xperia S using xda premium

Thaevil0ne · Mar 25, 2013

oranglewat said:
Ooooh snap! Works on my phone.

My phone is rooted. So maybe it works only on rooted phones? I'm using the latest firmware (434)

Edit:
Ok gave it several tries.

When you use the exploit, the phone won't lock again till you restart or change the lock screen.

Can anybody else confirm this?

I can indeed confirm this.
After using it for 3 or 4 times phone refuses to lock + home button no longer works.
Instead of that it brings you to homescreen, it flashes the screen once and nothing happens.

Also still love how you can use mini apps from anywhere in this menu.
A lot of fixing is to be done here.
First root exploit via this menu and now this.

Kind regards, Stefan.

miniake · Mar 25, 2013

I can confirm this too.

C6603 with 10.1.A.1.434 latest firmware.

LitoNi · Mar 25, 2013

Same thing happening on the xperia t

scottreeddev · Mar 26, 2013

Thanks to everyone who have posted result on the different devices, I have had an email back from the software security department at Sony, if they e-mail me with any useful information I will let everyone know but at least they are aware of the issue. Thanks guys:good:

Bypass Lock Screen

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