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Amazon Linux 2023: CVE-2023-4001: Medium priority package update for grub2

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Amazon Linux 2023: CVE-2023-4001: Medium priority package update for grub2

Severity
7
CVSS
(AV:L/AC:L/Au:N/C:C/I:C/A:C)
Published
01/09/2024
Created
02/14/2025
Added
02/14/2025
Modified
02/14/2025

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)

  • amazon-linux-2023-upgrade-grub2-common
  • amazon-linux-2023-upgrade-grub2-debuginfo
  • amazon-linux-2023-upgrade-grub2-debugsource
  • amazon-linux-2023-upgrade-grub2-efi-aa64
  • amazon-linux-2023-upgrade-grub2-efi-aa64-cdboot
  • amazon-linux-2023-upgrade-grub2-efi-aa64-ec2
  • amazon-linux-2023-upgrade-grub2-efi-aa64-modules
  • amazon-linux-2023-upgrade-grub2-efi-x64
  • amazon-linux-2023-upgrade-grub2-efi-x64-cdboot
  • amazon-linux-2023-upgrade-grub2-efi-x64-ec2
  • amazon-linux-2023-upgrade-grub2-efi-x64-modules
  • amazon-linux-2023-upgrade-grub2-emu
  • amazon-linux-2023-upgrade-grub2-emu-debuginfo
  • amazon-linux-2023-upgrade-grub2-emu-modules
  • amazon-linux-2023-upgrade-grub2-pc
  • amazon-linux-2023-upgrade-grub2-pc-modules
  • amazon-linux-2023-upgrade-grub2-tools
  • amazon-linux-2023-upgrade-grub2-tools-debuginfo
  • amazon-linux-2023-upgrade-grub2-tools-efi
  • amazon-linux-2023-upgrade-grub2-tools-efi-debuginfo
  • amazon-linux-2023-upgrade-grub2-tools-extra
  • amazon-linux-2023-upgrade-grub2-tools-extra-debuginfo
  • amazon-linux-2023-upgrade-grub2-tools-minimal
  • amazon-linux-2023-upgrade-grub2-tools-minimal-debuginfo

References

  • https://attackerkb.com/topics/cve-2023-4001
  • CVE - 2023-4001
  • https://alas.aws.amazon.com/AL2023/ALAS-2024-555.html
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