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ck

Member Since Dec 2017

1 Posts
3 Comments
Upvotes 70%
Downvotes 30%
  • Subject Posted By Forum Category Last Activity Activity
    Bitlocker security issue
    By ck, 4 years ago
    2 Replies
    Forum: Microsoft
    Category: Microsoft
    ck Microsoft Microsoft 4 years ago 2 Replies

    comment
    it’s nice to see Microsoft acknowledging problems with Windows 10, but this should be across the product, no

    Posted 3 years ago on Microsoft 365 and the Future of Windows (Premium) – 24 Comments

    Forum Post

    Bitlocker security issue

    I’ve come across an issue with Bitlocker being automatically suspended by the system after each cumulative update in Windows 10 (Pro) 1803. This only happens on systems that don’t have a TPM and use a password protector instead.


    What happens is that after the CU is applied and the system restarts, Bitlocker is automatically suspended on the operating system drive and remains that way until either the user manually resumes it, or the system is rebooted. This did not happen in 1709, and I’ve reproduced it on clean installs and even in a Virtualbox VM. I’ve also noticed that it happened on my wife’s company machine (where it remained suspended for a week because she doesn’t restart daily).


    While Bitlocker is suspended, the encryption key is available in the clear and so is something of a security risk. Not a major risk because exploiting it requires physical access and that access is also time constrained (it must happen immediately after a CU is applied), but a risk nontheless.


    I’ve posted on Technet about my adventure with this, and reported it in the Feedback Hub. Eventually, 2 other posters confirmed the behaviour on Technet, and I’ve seen it on my machine and my wife’s work machine. I’d be interested in hearing from others seeing this (remember: 1803, no TPM) to see how widespread this may be. Also, apart from reporting via Feedback Hub, how does one report this sort of issue to Microsoft?

    Edit: if you haven't noticed it happening and want to check, you can check the Bitlocker logs: Event Viewer -> Applications and Services Logs -> Microsoft -> Windows -> Bitlocker-API -> Management. Look for warnings, the dates should correlate with the CU's listed in Windows Update history.





    Posted 4 years ago on Bitlocker security issue – 2 Comments

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    Posted 4 years ago on Quick MacBook Air Check-In (Premium) – 23 Comments

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    Posted 4 years ago on Linux App Support is Coming to Chrome OS – 123 Comments

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    Posted 4 years ago on Linux App Support is Coming to Chrome OS – 123 Comments

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    Posted 4 years ago on The Future of Windows? (Premium) – 97 Comments

    comment
    As a developer, "power user" and enthusiast who happens to use both PC and Mac, I enjoyed Paul's article.

    Posted 4 years ago on Here’s What’s Really Happening with Windows 10 (Premium) – 132 Comments

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