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CVE-2021-22565

Estado: ModificadaMedia (6.5)—

An attacker could prematurely expire a verification code, making it unusable by the patient, making the patient unable to upload their TEKs to generate exposure notifications. We recommend upgrading the Exposure Notification server to V1.1.2 or greater.

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)

Google — Exposure Notification Verification Server

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-22565",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 4.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "cve-coordination@google.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 2.5,
        "exploitabilityScore": 3.9
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 2.5,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "cve-coordination@google.com",
      "affectedData": [
        {
          "vendor": "Google LLC",
          "product": "Google Exposure-notifications-verification-server",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "lessThan": "1.1.2",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-12-09T13:15:08.767",
  "references": [
    {
      "url": "https://github.com/google/exposure-notifications-verification-server/releases/tag/v1.1.2",
      "tags": [
        "Patch",
        "Release Notes",
        "Third Party Advisory"
      ],
      "source": "cve-coordination@google.com"
    },
    {
      "url": "https://github.com/google/exposure-notifications-verification-server/security/advisories/GHSA-wx8q-rgfr-cf6v",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "cve-coordination@google.com"
    },
    {
      "url": "https://github.com/google/exposure-notifications-verification-server/releases/tag/v1.1.2",
      "tags": [
        "Patch",
        "Release Notes",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/google/exposure-notifications-verification-server/security/advisories/GHSA-wx8q-rgfr-cf6v",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "cve-coordination@google.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-284"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An attacker could prematurely expire a verification code, making it unusable by the patient, making the patient unable to upload their TEKs to generate exposure notifications. We recommend upgrading the Exposure Notification server to V1.1.2 or greater."
    },
    {
      "lang": "es",
      "value": "Un atacante podría hacer expirar prematuramente un código de verificación, haciéndolo inusable por el paciente, haciendo que éste no pueda cargar sus TEKs para generar notificaciones de exposición. Se recomienda actualizar el Servidor de Notificaciones de Exposición a la versión 1.1.2 o superior"
    }
  ],
  "lastModified": "2026-06-17T03:37:26.193",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:google:exposure_notification_verification_server:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C922D69E-FD60-4DD6-9E8F-96F5FB422462",
              "versionEndExcluding": "1.1.2"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve-coordination@google.com"
}