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  1. #1
    3 Star Lounger bmeacham's Avatar
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    Question Question about Dell XPS 13 Bios revs

    How can I find out what features were added in the various revisions of the BIOS for my Dell XPS 13 (9343)? I have version A17 installed. I also have installation files for A07, A12, A13 and A15. At some point in that series the Spectre vulnerability was addressed. Now my machine seems a bit slow, and I would like to revert to a prior BIOS rev to see if it speeds up.

    BTW, how vulnerable would I be if I reverted to a prior BIOS? I understand the consequences of getting infected are serious, but I practice safe computing and believe the risk of getting infected is low. Am I kidding myself?
    Bill Meacham
    bmeacham98 AT yahoo.com

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    I don't know how to revert to a previous BIOS update.

    Meltdown and Spectre may have exploits in the wild, but with browser mitigation the returns from Phishing are likely to be much greater, so this will remain the most likely way to compromise user data, IMO. I do not plan to install hardware / BIOS patches on my machines unless they are part of a Windows update that can't easily be avoided.

    As always, use separate credentials / passwords for your online presence, backup regularly and keep an eye on your bank accounts / credit cards for malicious activity.

    cheers, Paul

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    Administrator jwitalka's Avatar
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    I can't find the A17 BIOS rev. According to https://www.dell.com/support/home/us...driverid=rtnyc
    The A15 BIOS is a fix to "Update to the latest CPU microcode to address CVE-2017-5715 and associated Intel Reboot issue. "

    The description of CVE-2017-5715 is "Systems with microprocessors utilizing speculative execution and indirect branch prediction may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis."

    It's your choice as to whether you want to use an earlier BIOS rev.

    Jerry

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    5 Star Lounger Vincenzo's Avatar
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    Steve Gibson at GRC has a very light tool that will let you know if you are patched, in Bios and/or in Windows, against Spectre and Meltdown. It will then let you know if the patches are or will be slowing down the computer.

    https://www.grc.com/inspectre.htm

  6. #5
    3 Star Lounger bmeacham's Avatar
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    Quote Originally Posted by jwitalka View Post
    I can't find the A17 BIOS rev.
    I can't either. I have Dell's SupportAssist application installed, and I guess it must have updated the BIOS for me. Thanks for the link to BIOS descriptions.
    Bill Meacham
    bmeacham98 AT yahoo.com

  7. #6
    3 Star Lounger bmeacham's Avatar
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    Quote Originally Posted by Vincenzo View Post
    Steve Gibson at GRC has a very light tool that will let you know if you are patched, ... https://www.grc.com/inspectre.htm
    Yes. That tool says I'm fully patched, and that my performance is good, so I think I'll just stick with the latest BIOS.
    Bill Meacham
    bmeacham98 AT yahoo.com

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