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CVE-2023-4693

Estado: ModificadaMedia (4.6)—

An out-of-bounds read flaw was found on grub2's NTFS filesystem driver. This issue may allow a physically present attacker to present a specially crafted NTFS file system image to read arbitrary memory locations. A successful attack allows sensitive data cached in memory or EFI variable values to be leaked, presenting a high Confidentiality risk.

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 (2)

GNU — Grub2Redhat — Enterprise Linux

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2023-4693",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
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        "type": "Secondary",
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          "version": "3.1",
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          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "NONE",
          "privilegesRequired": "HIGH",
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          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
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        "impactScore": 3.6,
        "exploitabilityScore": 0.9
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  "published": "2023-10-25T18:17:41.817",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "secalert@redhat.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ]
    },
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  "descriptions": [
    {
      "lang": "en",
      "value": "An out-of-bounds read flaw was found on grub2's NTFS filesystem driver. This issue may allow a physically present attacker to present a specially crafted NTFS file system image to read arbitrary memory locations. A successful attack allows sensitive data cached in memory or EFI variable values to be leaked, presenting a high Confidentiality risk."
    },
    {
      "lang": "es",
      "value": "Se encontró una falla de lectura fuera de los límites en el controlador del sistema de archivos NTFS de grub2. Este problema puede permitir que un atacante físicamente presente presente una imagen del sistema de archivos NTFS especialmente manipulada para leer ubicaciones de memoria arbitrarias. Un ataque exitoso permite que se filtren datos confidenciales almacenados en caché en la memoria o valores de variables EFI, lo que presenta un alto riesgo de confidencialidad."
    }
  ],
  "lastModified": "2026-07-21T06:16:27.680",
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