“Something has gone seriously wrong,” dual-boot systems warn after Microsoft update
“Something has gone seriously wrong,” dual-boot systems warn after Microsoft update
Microsoft said its update wouldn't install on Linux devices. It did anyway.
Last Tuesday, loads of Linux users—many running packages released as early as this year—started reporting their devices were failing to boot. Instead, they received a cryptic error message that included the phrase: “Something has gone seriously wrong.”
The cause: an update Microsoft issued as part of its monthly patch release. It was intended to close a 2-year-old vulnerability in GRUB, an open source boot loader used to start up many Linux devices. The vulnerability, with a severity rating of 8.6 out of 10, made it possible for hackers to bypass secure boot, the industry standard for ensuring that devices running Windows or other operating systems don’t load malicious firmware or software during the bootup process. CVE-2022-2601 was discovered in 2022, but for unclear reasons, Microsoft patched it only last Tuesday.
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The reports indicate that multiple distributions, including Debian, Ubuntu, Linux Mint, Zorin OS, Puppy Linux, are all affected. Microsoft has yet to acknowledge the error publicly, explain how it wasn’t detected during testing, or provide technical guidance to those affected. Company representatives didn’t respond to an email seeking answers.
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I'm confused - why is Microsoft trying to - or expected to, by the article authors - patch a vulnerability in GRUB?
It was supposed to patch Secure Boot, not demolish GRUB.
That's why it's a problem.
I was interested too. It seems Microsoft has released a patch that blacklists vulnerable grub versions from being able to be secure booted even if they are signed properly:
https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2022-2601
The link was at the top of the article.
Maybe this update somehow affects your UEFI firmware, and it installs a list in there?
Because they don't want ignorant end users to blame them if the ancient, unpatched version of GRUB that's at issue is used as part of an exploit attacking Windows boxes.