Riskcovery

CVE-2023-4001

Grub2: bypass the grub password protection feature

State
Published
Severity
6.8 Medium
Published
Jan 15, 2024
Updated
Nov 20, 2025
Reserved
Jul 28, 2023

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.16.8 MediumCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hredhat

Weaknesses

  • CWE-290 Authentication Bypass by Spoofing

Affected Products

ProductVersions
Red Hat Enterprise Linux 9Red Hat
  • 1:2.06-70.el9_3.2 and laterNot affected
Red Hat Enterprise Linux 9.0 Extended Update SupportRed Hat
  • 1:2.06-27.el9_0.16 and laterNot affected
Red Hat Enterprise Linux 9.2 Extended Update SupportRed Hat
  • 1:2.06-61.el9_2.2 and laterNot affected
Red Hat Enterprise Linux 8Red Hat

    References

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