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CVE-2020-5371

Estado: ModificadaAlta (8.8)—

Dell EMC Isilon OneFS versions 8.2.2 and earlier and Dell EMC PowerScale version 9.0.0 contain a file permissions vulnerability. An attacker, with network or local file access, could take advantage of insufficiently applied file permissions or gain unauthorized access to files.

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.

Fuente: mapeo oficial MITRE CTID (CVE → ATT&CK).

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Threat Intelligence ProgramExecution PreventionApplication Isolation and SandboxingExploit ProtectionUpdate SoftwareData Loss Prevention

Tecnologías afectadas (2)

Dell — EMC Isilon OnefsDell — EMC Powerscale Onefs

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2020-5371",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 6.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security_alert@emc.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 2.1
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.8,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "security_alert@emc.com",
      "affectedData": [
        {
          "vendor": "Dell",
          "product": "Isilon OneFS",
          "versions": [
            {
              "status": "affected",
              "version": "8.1.2, 8.2.1, 8.2.2"
            }
          ]
        }
      ]
    }
  ],
  "published": "2020-07-06T18:15:21.043",
  "references": [
    {
      "url": "https://www.dell.com/support/security/en-us/details/544593/DSA-2020-155-Dell-EMC-Isilon-OneFS-and-Dell-EMC-PowerScale-Security-Update-for-a-Permissions-Vuln",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "security_alert@emc.com"
    },
    {
      "url": "https://www.dell.com/support/security/en-us/details/544593/DSA-2020-155-Dell-EMC-Isilon-OneFS-and-Dell-EMC-PowerScale-Security-Update-for-a-Permissions-Vuln",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security_alert@emc.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-732"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-732"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Dell EMC Isilon OneFS versions 8.2.2 and earlier and Dell EMC PowerScale version 9.0.0 contain a file permissions vulnerability. An attacker, with network or local file access, could take advantage of insufficiently applied file permissions or gain unauthorized access to files."
    },
    {
      "lang": "es",
      "value": "Dell EMC Isilon OneFS versiones 8.2.2 y anteriores y Dell EMC PowerScale versión 9.0.0, contiene una vulnerabilidad de permisos de archivos. Un atacante, con acceso a archivos de red o locales, podría tomar ventaja de permisos de archivos insuficientemente aplicados y conseguir acceso no autorizado a archivos"
    }
  ],
  "lastModified": "2026-06-17T03:21:22.300",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:dell:emc_isilon_onefs:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "1041FD80-0BC7-4C1E-B310-B17EB68668D6",
              "versionEndIncluding": "8.2.2"
            },
            {
              "criteria": "cpe:2.3:o:dell:emc_powerscale_onefs:9.0.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5422D856-00B1-47FA-8D62-9B464A43BAC9"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security_alert@emc.com"
}