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CVE-2025-0624

Estado: AplazadaAlta (7.6)—

A flaw was found in grub2. During the network boot process, when trying to search for the configuration file, grub copies data from a user controlled environment variable into an internal buffer using the grub_strcpy() function. During this step, it fails to consider the environment variable length when allocating the internal buffer, resulting in an out-of-bounds write. If correctly exploited, this issue may result in remote code execution through the same network segment grub is searching for the boot information, which can be used to by-pass secure boot protections.

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vector AV:A (red adyacente) + PR:H + buffer overflow remoto en grub durante arranque de red → T1210. Ejecución de código remoto + bypass de Secure Boot → T1059 + T1068 (escalada a privilegios de firmware/sistema).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Threat Intelligence ProgramPrivileged Account ManagementExecution PreventionDisable or Remove Feature or ProgramApplication Isolation and SandboxingExploit Protection

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

GNU — Grub2AI

CWE

Referencias

JSON original (NVD)

Mostrar
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  "published": "2025-02-19T19:15:15.120",
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  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "secalert@redhat.com",
      "description": [
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          "lang": "en",
          "value": "CWE-787"
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      "lang": "en",
      "value": "A flaw was found in grub2. During the network boot process, when trying to search for the configuration file, grub copies data from a user controlled environment variable into an internal buffer using the grub_strcpy() function. During this step, it fails to consider the environment variable length when allocating the internal buffer, resulting in an out-of-bounds write. If correctly exploited, this issue may result in remote code execution through the same network segment grub is searching for the boot information, which can be used to by-pass secure boot protections."
    },
    {
      "lang": "es",
      "value": "Se encontró una falla en grub2. Durante el proceso de arranque de red, al intentar buscar el archivo de configuración, grub copia datos de una variable de entorno controlada por el usuario en un búfer interno mediante la función grub_strcpy(). Durante este paso, no tiene en cuenta la longitud de la variable de entorno al asignar el búfer interno, lo que da como resultado una escritura fuera de los límites. Si se explota correctamente, este problema puede dar como resultado la ejecución de código remoto a través del mismo segmento de red en el que grub está buscando la información de arranque, que se puede utilizar para eludir las protecciones de arranque seguro."
    }
  ],
  "lastModified": "2026-08-31T17:17:32.697",
  "sourceIdentifier": "secalert@redhat.com"
}