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CVE-2021-43858

Estado: ModificadaAlta (8.8)—💥 PoC

MinIO es una aplicación nativa de Kubernetes para el almacenamiento en la nube. En versiones anteriores a "RELEASE.2021-12-27T07-23-18Z", un cliente malicioso puede elaborar manualmente una llamada a la API HTTP que permite actualizar la política de un usuario y alcanzar mayores privilegios. El parche de la versión "RELEASE.2021-12-27T07-23-18Z" cambia el tipo de cuerpo de petición aceptado y elimina la posibilidad de aplicar cambios de política mediante esta API. Se presenta una solución para esta vulnerabilidad: El cambio de contraseñas puede deshabilitarse al añadir una regla explícita "Deny" para deshabilitar la API para los usuarios

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).

💥 Exploits públicos

Hay código de explotación o plantillas de detección públicos. No es lo mismo que explotación activa confirmada (KEV), pero aumenta el riesgo: parchee con prioridad.

⚠️ Las pruebas de concepto de GitHub no están verificadas: algunas son falsas o contienen malware. No las ejecute nunca fuera de un laboratorio aislado.

Tecnologías afectadas (1)

Minio — Minio

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2021-43858",
  "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-advisories@github.com",
        "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-advisories@github.com",
      "affectedData": [
        {
          "vendor": "minio",
          "product": "minio",
          "versions": [
            {
              "status": "affected",
              "version": "< RELEASE.2021-12-27T07-23-18Z"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-12-27T22:15:07.703",
  "references": [
    {
      "url": "https://github.com/minio/minio/commit/5a96cbbeaabd0a82b0fe881378e7c21c85091abf",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/minio/minio/pull/13976",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/minio/minio/pull/7949",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/minio/minio/releases/tag/RELEASE.2021-12-27T07-23-18Z",
      "tags": [
        "Release Notes",
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/minio/minio/security/advisories/GHSA-j6jc-jqqc-p6cx",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/minio/minio/commit/5a96cbbeaabd0a82b0fe881378e7c21c85091abf",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/minio/minio/pull/13976",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/minio/minio/pull/7949",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/minio/minio/releases/tag/RELEASE.2021-12-27T07-23-18Z",
      "tags": [
        "Release Notes",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/minio/minio/security/advisories/GHSA-j6jc-jqqc-p6cx",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-269"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "MinIO is a Kubernetes native application for cloud storage. Prior to version `RELEASE.2021-12-27T07-23-18Z`, a malicious client can hand-craft an HTTP API call that allows for updating policy for a user and gaining higher privileges. The patch in version `RELEASE.2021-12-27T07-23-18Z` changes the accepted request body type and removes the ability to apply policy changes through this API. There is a workaround for this vulnerability: Changing passwords can be disabled by adding an explicit `Deny` rule to disable the API for users."
    },
    {
      "lang": "es",
      "value": "MinIO es una aplicación nativa de Kubernetes para el almacenamiento en la nube. En versiones anteriores a \"RELEASE.2021-12-27T07-23-18Z\", un cliente malicioso puede elaborar manualmente una llamada a la API HTTP que permite actualizar la política de un usuario y alcanzar mayores privilegios. El parche de la versión \"RELEASE.2021-12-27T07-23-18Z\" cambia el tipo de cuerpo de petición aceptado y elimina la posibilidad de aplicar cambios de política mediante esta API. Se presenta una solución para esta vulnerabilidad: El cambio de contraseñas puede deshabilitarse al añadir una regla explícita \"Deny\" para deshabilitar la API para los usuarios"
    }
  ],
  "lastModified": "2026-06-17T04:11:35.250",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:minio:minio:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "FEAC2280-F0A0-409B-A579-73896CA26334",
              "versionEndExcluding": "2021-12-27t07-23-18z"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security-advisories@github.com"
}