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CVE-2023-4001

Estado: ModificadaMedia (6.8)—

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.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (3)

Fedoraproject — FedoraGNU — Grub2Redhat — Enterprise Linux

CWE

Referencias

JSON original (NVD)

Mostrar
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      "lang": "es",
      "value": "Se encontró un fallo de omisión de autenticación en GRUB debido a la forma en que GRUB usa el UUID de un dispositivo para buscar el archivo de configuración que contiene el hash de contraseña para la función de protección de contraseña de GRUB. Un atacante capaz de conectar una unidad externa, como una memoria USB que contenga un sistema de archivos con un UUID duplicado (el mismo que en el sistema de archivos \"/boot/\") puede omitir la función de protección con contraseña GRUB en los sistemas UEFI, que enumeran unidades extraíbles. antes que los no removibles. Este problema se introdujo en un parche posterior en la versión de grub2 de Red Hat y no afecta el paquete anterior."
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  "lastModified": "2026-06-17T06:36:53.070",
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