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CVE-2018-8434

Estado: ModificadaMedia (5.4)—

Existe una vulnerabilidad de divulgación de información cuando Windows Hyper-V, en un sistema operativo host, valida incorrectamente entradas de un usuario autenticado en un sistema operativo invitado. Esto también se conoce como "Windows Hyper-V Information Disclosure Vulnerability". Esto afecta a Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10 y Windows 10 Servers.

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 (6)

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2018-8434",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
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          "baseScore": 5.2,
          "accessVector": "ADJACENT_NETWORK",
          "vectorString": "AV:A/AC:M/Au:S/C:C/I:N/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "NONE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 6.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 4.4,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
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    "cvssMetricV30": [
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          "version": "3.0",
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          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.0/AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "NONE",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "HIGH"
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        "impactScore": 4,
        "exploitabilityScore": 1
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          "product": "Windows 10",
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              "status": "affected",
              "version": "Version 1607 for x64-based Systems"
            },
            {
              "status": "affected",
              "version": "Version 1703 for x64-based Systems"
            },
            {
              "status": "affected",
              "version": "Version 1709 for x64-based Systems"
            },
            {
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              "version": "Version 1803 for x64-based Systems"
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              "status": "affected",
              "version": "x64-based Systems"
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        {
          "vendor": "Microsoft",
          "product": "Windows 10 Servers",
          "versions": [
            {
              "status": "affected",
              "version": "version 1709  (Server Core Installation)"
            },
            {
              "status": "affected",
              "version": "version 1803  (Server Core Installation)"
            }
          ]
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  ],
  "published": "2018-09-13T00:29:03.647",
  "references": [
    {
      "url": "http://www.securityfocus.com/bid/105239",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "secure@microsoft.com"
    },
    {
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      "tags": [
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        "VDB Entry"
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      "source": "secure@microsoft.com"
    },
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8434",
      "tags": [
        "Patch",
        "Vendor Advisory"
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      "source": "secure@microsoft.com"
    },
    {
      "url": "http://www.securityfocus.com/bid/105239",
      "tags": [
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    },
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      "tags": [
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        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        },
        {
          "lang": "en",
          "value": "CWE-200"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An information disclosure vulnerability exists when Windows Hyper-V on a host operating system fails to properly validate input from an authenticated user on a guest operating system, aka \"Windows Hyper-V Information Disclosure Vulnerability.\" This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers."
    },
    {
      "lang": "es",
      "value": "Existe una vulnerabilidad de divulgación de información cuando Windows Hyper-V, en un sistema operativo host, valida incorrectamente entradas de un usuario autenticado en un sistema operativo invitado. Esto también se conoce como \"Windows Hyper-V Information Disclosure Vulnerability\". Esto afecta a Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10 y Windows 10 Servers."
    }
  ],
  "lastModified": "2026-06-17T02:04:51.870",
  "configurations": [
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}