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CVE-2021-45489

Estado: ModificadaAlta (7.5)—

En NetBSD versiones hasta 9.2, el algoritmo de generación de etiquetas de flujo IPv6 emplea un PRNG criptográfico débil

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)

Netbsd — Netbsd

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-45489",
  "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:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "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:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-12-25T02:15:06.847",
  "references": [
    {
      "url": "http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2021-001.txt.asc",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://arxiv.org/pdf/2112.09604.pdf",
      "tags": [
        "Technical Description",
        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2021-001.txt.asc",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://arxiv.org/pdf/2112.09604.pdf",
      "tags": [
        "Technical Description",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-338"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In NetBSD through 9.2, the IPv6 Flow Label generation algorithm employs a weak cryptographic PRNG."
    },
    {
      "lang": "es",
      "value": "En NetBSD versiones hasta 9.2, el algoritmo de generación de etiquetas de flujo IPv6 emplea un PRNG criptográfico débil"
    }
  ],
  "lastModified": "2026-06-17T04:13:29.707",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:netbsd:netbsd:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C0992771-F022-4195-A4DF-4323FF07B04F",
              "versionEndIncluding": "9.2"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}