CVE-2023-4001 Information

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.

Reference

https://access.redhat.com/security/cve/CVE-2023-4001 https://bugzilla.redhat.com/show_bug.cgi?id=2224951 https://dfir.ru/2024/01/15/cve-2023-4001-a-vulnerability-in-the-downstream-grub-boot-manager/