Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2023-4001

Authentication Bypass by Spoofing

Published: Jan 15, 2024 | Modified: Nov 21, 2024
CVSS 3.x
6.8
MEDIUM
Source:
NVD
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
RedHat/V2
RedHat/V3
6.8 MODERATE
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Ubuntu
MEDIUM
Vulnerability-free packages from our partners
root.io logo minimus.io logo echo.ai logo
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2023-4001
CWEhttps://cwe.mitre.org/data/definitions/290.html

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 Hats version of grub2 and does not affect the upstream package.

Weakness

This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.

Affected Software

NameVendorStart VersionEnd Version
Grub2Gnu- (including)- (including)
Red Hat Enterprise Linux 9RedHatgrub2-1:2.06-70.el9_3.2*
Red Hat Enterprise Linux 9.0 Extended Update SupportRedHatgrub2-1:2.06-27.el9_0.16*
Red Hat Enterprise Linux 9.2 Extended Update SupportRedHatgrub2-1:2.06-61.el9_2.2*
Grub2Ubuntubionic*
Grub2Ubuntutrusty*
Grub2Ubuntuxenial*
Grub2-signedUbuntubionic*
Grub2-signedUbuntuesm-infra-legacy/trusty*
Grub2-signedUbuntutrusty*
Grub2-signedUbuntutrusty/esm*
Grub2-signedUbuntuxenial*
Grub2-unsignedUbuntubionic*
Grub2-unsignedUbuntutrusty*
Grub2-unsignedUbuntuxenial*

References

Aqua Security is the largest pure-play cloud native security company, providing customers the freedom to innovate and run their businesses with minimal friction. The Aqua Cloud Native Security Platform provides prevention, detection, and response automation across the entire application lifecycle to secure the build, secure cloud infrastructure and secure running workloads wherever they are deployed.
Copyright © 2026 Aqua Security Software Ltd.   Privacy Policy | Terms of Use