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CVE-2021-1771

Estado: ModificadaBaja (3.3)—

This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave. A user that is removed from an iMessage group could rejoin the group.

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 (2)

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2021-1771",
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        "source": "nvd@nist.gov",
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
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        "impactScore": 2.9,
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        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
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          "version": "3.1",
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          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N",
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          "userInteraction": "REQUIRED",
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          "privilegesRequired": "NONE",
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        "impactScore": 1.4,
        "exploitabilityScore": 1.8
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  },
  "affected": [
    {
      "source": "product-security@apple.com",
      "affectedData": [
        {
          "vendor": "Apple",
          "product": "macOS",
          "versions": [
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              "version": "unspecified",
              "lessThan": "11.2",
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  "published": "2021-04-02T18:15:20.700",
  "references": [
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      "url": "https://support.apple.com/en-us/HT212147",
      "tags": [
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        "Vendor Advisory"
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      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
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          "value": "NVD-CWE-noinfo"
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  "descriptions": [
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      "lang": "en",
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    },
    {
      "lang": "es",
      "value": "Este problema es abordado con una comprobación de la entrada mejorada. Este problema es corregido en macOS Big Sur versión 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave. Un usuario que es eliminado de un grupo de iMessage podría volver a unirse al grupo."
    }
  ],
  "lastModified": "2026-06-17T03:32:31.717",
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