CVSS 3.1
6.8 mediumCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE-2023-4001
Medium (6.8). EPSS 0.5% chance of exploitation in the next 30 days.
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.
Severity
- EPSS
- 0.5% chance of exploitation in the next 30 days; higher than 45% of CVEs (scores of 2026-10-31)
- CWE
- CWE-290
- Published
- Modified
- Record from
- the NVD, synced
Affected
- fedoraproject:fedora
- gnu:grub2
- redhat:enterprise_linux