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  1. Aditya Pamidipati's Avatar
    I have Lumia 640 with Windows 8.1

    I have set screen lock with number pattern

    I installed whatsapp and looks like everything is fine.

    When my phone is idle screen gets locked. Only way is to use the key to unlock the screen to use the phone.

    Defect I found is, when I get a call using whatsapp i can take the call but once call is disconnected phone remains unlocked with whatsapp app running

    This is not the case with normal incoming call from a service provider

    This is a major security breach on Microsoft Lumia 640 with windows 8.1


    Last edited by Laura Knotek; 09-23-2015 at 11:49 PM.
    09-23-2015 11:29 PM
  2. xandros9's Avatar
    Can you get out of WhatsApp in that state?
    09-23-2015 11:52 PM
  3. Rose640's Avatar
    I don't think this is a MS's failure.
    libra89 likes this.
    09-24-2015 05:35 AM
  4. a5cent's Avatar
    I don't think this is a MS's failure.
    If true... It's definitely MS' failure!

    You can't place the responsibility for security on the shoulders of app developers. Any security mechanism that isn't enforced by the OS will always crumble as soon as app developers get their hands on it. Preventing that, by enforcing security related rules, is one of the primary things an OS must do!

    In this case, the OS must ensure that anything that can be used through the lock screen doesn't deactivate the lock screen.
    Last edited by a5cent; 09-25-2015 at 01:57 PM. Reason: "if true" in first line
    ssapre and xandros9 like this.
    09-25-2015 06:13 AM
  5. realwarder's Avatar
    Skype does not remain unlocked and as WhatsApp should be using the same APIs, I find this odd.

    Can someone independently verify this who uses WhatsApp?
    Pete likes this.
    09-25-2015 07:24 AM
  6. VladoneTCB's Avatar
    I tried it. It didnt remain unlocked.
    libra89, Jazmac, Pete and 1 others like this.
    09-25-2015 07:49 AM
  7. realwarder's Avatar
    So two first time posters are claiming a security issue.

    If a > 200 poster confirms it, then I consider it confirmed as a security issue.
    Witness likes this.
    09-25-2015 12:18 PM
  8. a5cent's Avatar
    I have just tested this on W10M 10536, where I can't reproduce it.

    While I can answer a WhatsApp call, the device remains locked before, during and after. If I can answer the call, I'd prefer the dialer to stay in the foreground so I can also hang up, but that isn't currently possible. I wouldn't consider this a huge deal however. The dialer just stays in the background, and remains there no matter how many times you tap the bar at the top. Only unlocking the device changes that.

    The OP has reported this for WP8.1 however, which I can't test right now.
    Last edited by a5cent; 09-25-2015 at 03:51 PM. Reason: spelling
    xandros9 likes this.
    09-25-2015 01:53 PM
  9. Jazmac's Avatar
    Prove it or it didn't happen.

    Last edited by Jazmac; 09-25-2015 at 07:40 PM.
    xandros9 likes this.
    09-25-2015 07:12 PM
  10. neodk's Avatar
    09-28-2015 08:51 AM
  11. Kyzerdroid's Avatar
    why would that be a major security issue? unless you don't keep your phone with
    10-04-2015 12:56 PM

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