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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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How to extract firmware of my Lenovo T480? (pk.fail)

submitted 3 months ago* (last edited 3 months ago) by [email protected] to c/[email protected]

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I want to check if my Lenovo T480 is afftected by the recent PKFail, but have no idea how to extract the bios firmware for validation. Can someone detail the steps? Thanks.

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[–] CameronDev 10 points 3 months ago (1 children)

https://arstechnica.com/security/2024/07/secure-boot-is-completely-compromised-on-200-models-from-5-big-device-makers/

Bottom of that article, there are commands to run from windows and Linux to detect it. Probably easier than messing with the firmware.

[–] [email protected] 8 points 3 months ago* (last edited 3 months ago)

Thanks for the hint. I followed and checked: safe

$ efi-readvar -v PK
Variable PK, length 983
PK: List 0, type X509
    Signature 0, size 955, owner 3cc24e96-22c7-41d8-8863-8e39dcxxxxxx
        Subject:
            C=JP, ST=Kanagawa, L=Yokohama, O=Lenovo Ltd., CN=Lenovo Ltd. PK CA 2012
        Issuer:
            C=JP, ST=Kanagawa, L=Yokohama, O=Lenovo Ltd., CN=Lenovo Ltd. PK CA 2012