CVE-2023-4001

MEDIUM
Published Jan 15, 2024 Modified Nov 21, 2024 CWE-290

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.

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CVSS v3.1 Score

6.8
MEDIUM
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-290 CWE-290

Affected Products

Vendor Product
gnu grub2
redhat enterprise_linux
fedoraproject fedora
fedoraproject fedora

References

Frequently Asked Questions

What is CVE-2023-4001? +
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. It has a CVSS v3.1 base score of 6.8 (MEDIUM).
How severe is CVE-2023-4001? +
CVE-2023-4001 has a CVSS v3.1 score of 6.8 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.
What products are affected by CVE-2023-4001? +
CVE-2023-4001 affects products from fedoraproject, gnu, redhat, specifically: enterprise_linux, fedora, grub2. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2023-4001? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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