Why are MS Update Catalog downloads flagged as potentially unsafe?


  1. Posts : 981
    W10 Pro v21H2
       #1

    Why are MS Update Catalog downloads flagged as potentially unsafe?


    For a while now, downloads from Microsoft sites like the MS Update Catalog have been flagged as shown in the attached images:

    Why are MS Update Catalog downloads flagged as potentially unsafe?-annotation-2021-10-13-114323.png

    Why are MS Update Catalog downloads flagged as potentially unsafe?-2.jpg

    I searched the forum for 'unsafe downloads' but did not find anything on topic.

    Does anyone know why MS cannot say their own files are safe, or is this now considered a feature, or just something that is not a priority for MS to change?

    Perhaps it is just my OCD, but this bugs me.
      My Computers


  2. Posts : 4,187
    Windows 11 Pro, 22H2
       #2

    Interesting. This has bugged me too for a while, but not enough that I bothered to investigate. It was one of those items to investigate "when I got around to it".

    Prompted by your query, I did a search and found the following explanation:

    https://docs.microsoft.com/en-us/ans...ded-secur.html
      My Computers


  3. Posts : 31,622
    10 Home x64 (22H2) (10 Pro on 2nd pc)
       #3

    mta3006 said:
    For a while now, downloads from Microsoft sites like the MS Update Catalog have been flagged as shown....
    I searched the forum for 'unsafe downloads' but did not find anything on topic.
    Does anyone know why MS cannot say their own files are safe, or is this now considered a feature, or just something that is not a priority for MS to change?

    For reasons best known to themselves, Microsoft have chosen to deliver all downloads from an HTTP server, not an HTTPS one. Note the URL in this screenshot.

    Why are MS Update Catalog downloads flagged as potentially unsafe?-image.png



    The warning that now appears is nothing to do with any changes MS have made, they have always been using an HTTP server. What has changed recently is that all browsers now alert you when you try to use an insecure connection like this one.
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  4. Posts : 981
    W10 Pro v21H2
    Thread Starter
       #4

    Bree said:
    For reasons best known to themselves, Microsoft have chosen to deliver all downloads from an HTTP server, not an HTTPS one. ...........
    The warning that now appears is nothing to do with any changes MS have made, they have always been using an HTTP server. What has changed recently is that all browsers now alert you when you try to use an insecure connection like this one.
    Thanks for the clarification! So MS alerts users to an insecurity at their end, under their control, without eliminating the insecurity in 'Windows as a Service' ...

    Makes perfect 2020's sense to me!
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  5. Posts : 31,622
    10 Home x64 (22H2) (10 Pro on 2nd pc)
       #5

    mta3006 said:
    Thanks for the clarification! So MS alerts users to an insecurity at their end, under their control, without eliminating the insecurity in 'Windows as a Service' ...
    Makes perfect 2020's sense to me!
    Yes, it makes no sense to me either


    Bit there is no real insecurity. HTTPS primarily protects information you send to the website. It doesn't make a download any more secure.

    Microsoft said:
    If you’re just browsing the web and not entering any sensitive information, http:// is just fine. However, on pages that you enter your password, credit card number, or other financial information, you should always look for the https:// prefix.
    https://www.microsoft.com/security/b...he-difference/

    What does make your download from the MS Catalog safe is the ability to check that what you downloaded has the correct SHA1 checksum. If you ever wondered why every download from MS has a very long random character string as the end part of its file name, now you know - it's the SHA1 checksum that you should get if you check the file. Amongst other things, 7-Zip can be used to generate a file's checksum.

    Why are MS Update Catalog downloads flagged as potentially unsafe?-image.png
      My Computers


  6. Posts : 981
    W10 Pro v21H2
    Thread Starter
       #6

    Bree said:
    If you ever wondered why every download from MS has a very long random character string as the end part of its file name, now you know - it's the SHA1 checksum that you should get if you check the file.

    I wondered about those dang long filenames! Thank you very much for that very useful bit of information!

      My Computers


 

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