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.
Published: 2024-01-15
Score: 6.8 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Advisories
Source ID Title
EUVD EUVD EUVD-2023-53896 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.

Subscriptions

Fedoraproject Fedora
Gnu Grub2
Redhat Enterprise Linux Rhel Eus
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2025-11-20T19:52:00.512Z

Reserved: 2023-07-28T20:57:15.937Z

Link: CVE-2023-4001

cve-icon Vulnrichment

Updated: 2024-08-02T07:17:10.437Z

cve-icon NVD

Status : Modified

Published: 2024-01-15T11:15:08.270

Modified: 2024-11-21T08:34:11.900

Link: CVE-2023-4001

cve-icon Redhat

Severity : Moderate

Publid Date: 2024-01-09T00:00:00Z

Links: CVE-2023-4001 - Bugzilla

cve-icon OpenCVE Enrichment

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Weaknesses