CVE-2023-4001
MEDIUM
MEDIUM
Priority: 0.04
BB Relevance:
49/100
Published: 2024-01-15
Modified: 2026-11-07
First seen: 2026-11-07
Status: active
Attack Surface
Low Complexity
No Auth
No Interaction
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Physical
AC:
Low
PR:
None
UI:
None
S:
Unchanged
C:
High
I:
High
A:
High
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.
Weakness Classification (1)
Affected Software (4)
| Vendor | Product | Version |
|---|---|---|
| fedoraproject | fedora | 38 |
| fedoraproject | fedora | 39 |
| gnu | grub2 | - |
| redhat | enterprise_linux | 9.0 |
References & Advisories (10)
vendor-advisory
x_refsource_REDHAT
vendor-advisory
x_refsource_REDHAT
vendor-advisory
x_refsource_REDHAT
vdb-entry
x_refsource_REDHAT
issue-tracking
x_refsource_REDHAT