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CVE-2020-9487

Estado: ModificadaAlta (7.5)—

En Apache NiFi versiones 1.0.0 hasta 1.11.4, el mecanismo del token de descarga de NiFi (contraseña de un solo uso) usaba un tamaño de caché fijo y no autenticaba una petición para crear un token de descarga, solo cuando se intentaba usar el token para acceder al contenido. Un usuario no autenticado podría solicitar tokens de descarga de forma repetida, impidiendo que los usuarios legítimos soliciten tokens de descarga

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 (1)

Apache — Nifi

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2020-9487",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security@apache.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "Apache NiFi",
          "versions": [
            {
              "status": "affected",
              "version": "Apache NiFi 1.0.0 to 1.11.4"
            }
          ]
        }
      ]
    }
  ],
  "published": "2020-10-01T20:15:14.253",
  "references": [
    {
      "url": "https://nifi.apache.org/security#CVE-2020-9487",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "security@apache.org"
    },
    {
      "url": "https://nifi.apache.org/security#CVE-2020-9487",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-306"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In Apache NiFi 1.0.0 to 1.11.4, the NiFi download token (one-time password) mechanism used a fixed cache size and did not authenticate a request to create a download token, only when attempting to use the token to access the content. An unauthenticated user could repeatedly request download tokens, preventing legitimate users from requesting download tokens."
    },
    {
      "lang": "es",
      "value": "En Apache NiFi versiones 1.0.0 hasta 1.11.4, el mecanismo del token de descarga de NiFi (contraseña de un solo uso) usaba un tamaño de caché fijo y no autenticaba una petición para crear un token de descarga, solo cuando se intentaba usar el token para acceder al contenido. Un usuario no autenticado podría solicitar tokens de descarga de forma repetida, impidiendo que los usuarios legítimos soliciten tokens de descarga"
    }
  ],
  "lastModified": "2026-06-17T03:28:02.383",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:apache:nifi:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "43022122-9397-48D7-BD86-925042103633",
              "versionEndIncluding": "1.11.4",
              "versionStartIncluding": "1.0.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security@apache.org"
}