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Alma Linux: CVE-2023-4001: Moderate: grub2 security update (ALSA-2024-0468)

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Alma Linux: CVE-2023-4001: Moderate: grub2 security update (ALSA-2024-0468)

Severity
7
CVSS
(AV:L/AC:L/Au:N/C:C/I:C/A:C)
Published
01/15/2024
Created
01/30/2024
Added
01/29/2024
Modified
01/30/2025

Description

An authentication bypass flaw was found in GRUB due to the way that GRUB uses the UUID of a device to search for the configuration file that contains the password hash for the GRUB password protection feature. An attacker capable of attaching an external drive such as a USB stick containing a file system with a duplicate UUID (the same as in the "/boot/" file system) can bypass the GRUB password protection feature on UEFI systems, which enumerate removable drives before non-removable ones. This issue was introduced in a downstream patch in Red Hat's version of grub2 and does not affect the upstream package.

Solution(s)

  • alma-upgrade-grub2-common
  • alma-upgrade-grub2-efi-aa64
  • alma-upgrade-grub2-efi-aa64-cdboot
  • alma-upgrade-grub2-efi-aa64-modules
  • alma-upgrade-grub2-efi-x64
  • alma-upgrade-grub2-efi-x64-cdboot
  • alma-upgrade-grub2-efi-x64-modules
  • alma-upgrade-grub2-pc
  • alma-upgrade-grub2-pc-modules
  • alma-upgrade-grub2-ppc64le
  • alma-upgrade-grub2-ppc64le-modules
  • alma-upgrade-grub2-tools
  • alma-upgrade-grub2-tools-efi
  • alma-upgrade-grub2-tools-extra
  • alma-upgrade-grub2-tools-minimal

References

  • https://attackerkb.com/topics/cve-2023-4001
  • CVE - 2023-4001
  • https://errata.almalinux.org/9/ALSA-2024-0468.html
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