CVE-2023-4692
Full vulnerability record from the local CVENow database.
Description
An out-of-bounds write flaw was found in grub2's NTFS filesystem driver. This issue may allow an attacker to present a specially crafted NTFS filesystem image, leading to grub's heap metadata corruption. In some circumstances, the attack may also corrupt the UEFI firmware heap metadata. As a result, arbitrary code execution and secure boot protection bypass may be achieved.
Severity
HIGH
CVSS score
7.8
(v3.1)
Vulnerability status
Modified
Source identifier
Published
2023-10-25 18:17:41.743000
Last modified
2026-11-07 12:17:37.913000
View original CVE JSON
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"sourceIdentifier": "[email protected]",
"published": "2023-10-25T18:17:41.743",
"lastModified": "2026-11-07T12:17:37.913",
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"value": "Se encontró una falla de escritura fuera de los límites en el controlador del sistema de archivos NTFS de grub2. Este problema puede permitir que un atacante presente una imagen del sistema de archivos NTFS especialmente manipulada, lo que provoca la corrupción de los metadatos del montón de grub. En algunas circunstancias, el ataque también puede dañar los metadatos del montón del firmware UEFI. Como resultado, se puede lograr la ejecución de código arbitrario y eludir la protección de arranque seguro."
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