FKIE_CVE-2020-9991

Vulnerability from fkie_nvd - Published: 2020-12-08 22:15 - Updated: 2026-06-17 03:28
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.0, iOS 14.0 and iPadOS 14.0, iCloud for Windows 7.21, tvOS 14.0. A remote attacker may be able to cause a denial of service.
References
product-security@apple.comhttp://seclists.org/fulldisclosure/2020/Dec/32Mailing List, Third Party Advisory
product-security@apple.comhttps://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
product-security@apple.comhttps://support.apple.com/en-us/HT211843Vendor Advisory
product-security@apple.comhttps://support.apple.com/en-us/HT211844Vendor Advisory
product-security@apple.comhttps://support.apple.com/en-us/HT211847Vendor Advisory
product-security@apple.comhttps://support.apple.com/en-us/HT211850Vendor Advisory
product-security@apple.comhttps://support.apple.com/en-us/HT211931Vendor Advisory
product-security@apple.comhttps://support.apple.com/kb/HT211846Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2020/Dec/32Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT211843Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT211844Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT211847Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT211850Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT211931Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/kb/HT211846Vendor Advisory
Impacted products
Vendor Product Version
apple icloud *
apple icloud *
apple ipados *
apple iphone_os *
apple mac_os_x *
apple tvos *
apple watchos *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "tvOS",
          "vendor": "Apple",
          "versions": [
            {
              "lessThan": "14.0",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "watchOS",
          "vendor": "Apple",
          "versions": [
            {
              "lessThan": "7.0",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "iCloud for Windows",
          "vendor": "Apple",
          "versions": [
            {
              "lessThan": "7.21",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "iOS and iPadOS",
          "vendor": "Apple",
          "versions": [
            {
              "lessThan": "14.0",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "macOS",
          "vendor": "Apple",
          "versions": [
            {
              "lessThan": "11.0",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "macOS",
          "vendor": "Apple",
          "versions": [
            {
              "lessThan": "11.0",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "product-security@apple.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:apple:icloud:*:*:*:*:*:windows:*:*",
              "matchCriteriaId": "F854A12B-B398-4EAD-B401-BD7C1D252803",
              "versionEndExcluding": "7.21",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:apple:icloud:*:*:*:*:*:windows:*:*",
              "matchCriteriaId": "85813E1D-819C-41F6-A076-E7BE40413FD1",
              "versionEndExcluding": "11.4",
              "versionStartIncluding": "11.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "10CC9ED4-9AE1-415A-94FF-60CB209506CA",
              "versionEndExcluding": "14.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "16AF4D2F-3C55-4DCC-A253-3F8CB4F453EF",
              "versionEndExcluding": "14.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "5CD08100-FC49-42F0-A226-0E5B523EC027",
              "versionEndExcluding": "11.0.1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "0D16EC4D-D2E7-476D-BFBC-3703C8F0B45E",
              "versionEndExcluding": "14.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C117BCCF-7789-40BB-AD25-1E712F6DCF7C",
              "versionEndExcluding": "7.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.0, iOS 14.0 and iPadOS 14.0, iCloud for Windows 7.21, tvOS 14.0. A remote attacker may be able to cause a denial of service."
    },
    {
      "lang": "es",
      "value": "Este problema se abord\u00f3 con comprobaciones mejoradas.\u0026#xa0;Este problema se corrigi\u00f3 en macOS Big Sur versi\u00f3n 11.0.1, watchOS versi\u00f3n 7.0, iOS versi\u00f3n 14.0 y iPadOS versi\u00f3n 14.0, iCloud para Windows versi\u00f3n 7.21, tvOS versi\u00f3n 14.0.\u0026#xa0;Un atacante remoto puede ser capaz de causar una denegaci\u00f3n de servicio"
    }
  ],
  "id": "CVE-2020-9991",
  "lastModified": "2026-06-17T03:28:56.260",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 5.0,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2020-12-08T22:15:19.273",
  "references": [
    {
      "source": "product-security@apple.com",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "http://seclists.org/fulldisclosure/2020/Dec/32"
    },
    {
      "source": "product-security@apple.com",
      "url": "https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E"
    },
    {
      "source": "product-security@apple.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.apple.com/en-us/HT211843"
    },
    {
      "source": "product-security@apple.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.apple.com/en-us/HT211844"
    },
    {
      "source": "product-security@apple.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.apple.com/en-us/HT211847"
    },
    {
      "source": "product-security@apple.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.apple.com/en-us/HT211850"
    },
    {
      "source": "product-security@apple.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.apple.com/en-us/HT211931"
    },
    {
      "source": "product-security@apple.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.apple.com/kb/HT211846"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "http://seclists.org/fulldisclosure/2020/Dec/32"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.apple.com/en-us/HT211843"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.apple.com/en-us/HT211844"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.apple.com/en-us/HT211847"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.apple.com/en-us/HT211850"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.apple.com/en-us/HT211931"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.apple.com/kb/HT211846"
    }
  ],
  "sourceIdentifier": "product-security@apple.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.