FKIE_CVE-2021-1884

Vulnerability from fkie_nvd - Published: 2021-09-08 15:15 - Updated: 2026-06-17 03:32
Severity
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
A race condition was addressed with improved locking. This issue is fixed in Security Update 2021-004 Mojave, iOS 14.5 and iPadOS 14.5, watchOS 7.4, Security Update 2021-003 Catalina, tvOS 14.5, macOS Big Sur 11.3. A remote attacker may be able to cause a denial of service.
References
product-security@apple.comhttps://support.apple.com/en-us/HT212317Vendor Advisory
product-security@apple.comhttps://support.apple.com/en-us/HT212323Vendor Advisory
product-security@apple.comhttps://support.apple.com/en-us/HT212324Vendor Advisory
product-security@apple.comhttps://support.apple.com/en-us/HT212325Vendor Advisory
product-security@apple.comhttps://support.apple.com/en-us/HT212530Vendor Advisory
product-security@apple.comhttps://support.apple.com/en-us/HT212531Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT212317Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT212323Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT212324Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT212325Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT212530Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT212531Vendor Advisory
Impacted products
Vendor Product Version
apple ipados *
apple iphone_os *
apple mac_os_x *
apple mac_os_x *
apple mac_os_x 10.14.6
apple mac_os_x 10.14.6
apple mac_os_x 10.14.6
apple mac_os_x 10.14.6
apple mac_os_x 10.14.6
apple mac_os_x 10.14.6
apple mac_os_x 10.14.6
apple mac_os_x 10.14.6
apple mac_os_x 10.14.6
apple mac_os_x 10.14.6
apple mac_os_x 10.14.6
apple mac_os_x 10.14.6
apple mac_os_x 10.14.6
apple mac_os_x 10.14.6
apple mac_os_x 10.14.6
apple mac_os_x 10.14.6
apple mac_os_x 10.14.6
apple mac_os_x 10.14.6
apple mac_os_x 10.14.6
apple mac_os_x 10.15.7
apple mac_os_x 10.15.7
apple mac_os_x 10.15.7
apple mac_os_x 10.15.7
apple mac_os_x 10.15.7
apple mac_os_x 10.15.7
apple mac_os_x 10.15.7
apple mac_os_x 10.15.7
apple macos *
apple tvos *
apple watchos *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "iOS and iPadOS",
          "vendor": "Apple",
          "versions": [
            {
              "lessThan": "14.5",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "tvOS",
          "vendor": "Apple",
          "versions": [
            {
              "lessThan": "14.5",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "watchOS",
          "vendor": "Apple",
          "versions": [
            {
              "lessThan": "7.4",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "macOS",
          "vendor": "Apple",
          "versions": [
            {
              "lessThan": "11.3",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "macOS",
          "vendor": "Apple",
          "versions": [
            {
              "lessThan": "2021",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "macOS",
          "vendor": "Apple",
          "versions": [
            {
              "lessThan": "2021",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "product-security@apple.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "3EAAE2C1-EF21-4567-99F1-335D1EF955D1",
              "versionEndExcluding": "14.5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C1E12568-6F17-458F-8216-3D6DBC8F6DEE",
              "versionEndExcluding": "14.5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "3E76BECE-0843-4B9F-90DE-7690764701B0",
              "versionEndExcluding": "10.14.6",
              "versionStartIncluding": "10.14.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "DB8A73F8-3074-4B32-B9F6-343B6B1988C5",
              "versionEndExcluding": "10.15.7",
              "versionStartIncluding": "10.15",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:10.14.6:-:*:*:*:*:*:*",
              "matchCriteriaId": "693E7DAE-BBF0-4D48-9F8A-20DDBD4AAC0C",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-001:*:*:*:*:*:*",
              "matchCriteriaId": "CFE26ECC-A2C2-4501-9950-510DE0E1BD86",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-002:*:*:*:*:*:*",
              "matchCriteriaId": "26108BEF-0847-4AB0-BD98-35344DFA7835",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-004:*:*:*:*:*:*",
              "matchCriteriaId": "A369D48B-6A0A-47AE-9513-D5E2E6F30931",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-005:*:*:*:*:*:*",
              "matchCriteriaId": "510F8317-94DA-498E-927A-83D5F41AF54A",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-006:*:*:*:*:*:*",
              "matchCriteriaId": "0D5D1970-6D2A-42CA-A203-42023D71730D",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-007:*:*:*:*:*:*",
              "matchCriteriaId": "C68AE52B-5139-40A4-AE9A-E752DBF07D1B",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-001:*:*:*:*:*:*",
              "matchCriteriaId": "0FD3467D-7679-479F-9C0B-A93F7CD0929D",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-002:*:*:*:*:*:*",
              "matchCriteriaId": "D4C6098E-EDBD-4A85-8282-B2E9D9333872",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-003:*:*:*:*:*:*",
              "matchCriteriaId": "518BB47B-DD76-4E8C-9F10-7EBC1E146191",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-004:*:*:*:*:*:*",
              "matchCriteriaId": "63940A55-D851-46EB-9668-D82BEFC1FE95",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-005:*:*:*:*:*:*",
              "matchCriteriaId": "68C7A97A-3801-44FA-96CA-10298FA39883",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-006:*:*:*:*:*:*",
              "matchCriteriaId": "6D69914D-46C7-4A0E-A075-C863C1692D33",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-007:*:*:*:*:*:*",
              "matchCriteriaId": "9CDB4476-B521-43E4-A129-8718A8E0A8CD",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2021-001:*:*:*:*:*:*",
              "matchCriteriaId": "9D072B77-BE3F-4A2E-B66A-E2C8DC3781E4",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2021-002:*:*:*:*:*:*",
              "matchCriteriaId": "A4A6BF78-B772-435C-AC1A-2199027CCF9E",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2021-003:*:*:*:*:*:*",
              "matchCriteriaId": "9A233DE4-D09A-4157-B852-E675889DD4C1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:10.14.6:supplemental_update:*:*:*:*:*:*",
              "matchCriteriaId": "2C88BD98-46F5-447F-963A-FB9B167E31BE",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:10.14.6:supplemental_update_2:*:*:*:*:*:*",
              "matchCriteriaId": "C7A0615B-D958-4BBF-B53F-AA839A0FE845",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:10.15.7:-:*:*:*:*:*:*",
              "matchCriteriaId": "A654B8A2-FC30-4171-B0BB-366CD7ED4B6A",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020:*:*:*:*:*:*",
              "matchCriteriaId": "F12CC8B5-C1EB-419E-8496-B9A3864656AD",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-001:*:*:*:*:*:*",
              "matchCriteriaId": "F1F4BF7F-90D4-4668-B4E6-B06F4070F448",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-005:*:*:*:*:*:*",
              "matchCriteriaId": "7FD7176C-F4D1-43A7-9E49-BA92CA0D9980",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-007:*:*:*:*:*:*",
              "matchCriteriaId": "2703DE0B-8A9E-4A9D-9AE8-028E22BF47CA",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-001:*:*:*:*:*:*",
              "matchCriteriaId": "0F441A43-1669-478D-9EC8-E96882DE4F9F",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-002:*:*:*:*:*:*",
              "matchCriteriaId": "D425C653-37A2-448C-BF2F-B684ADB08A26",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:mac_os_x:10.15.7:supplemental_update:*:*:*:*:*:*",
              "matchCriteriaId": "C1C795B9-E58D-467C-83A8-2D45C792292F",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "4E699CCC-31F5-458E-A59C-79B3AF143747",
              "versionEndExcluding": "11.3",
              "versionStartIncluding": "11.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "D5B77841-F161-47AB-8043-3E0346E3AA25",
              "versionEndExcluding": "14.5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "CFFFE00C-0AA6-4F60-ABF4-E68877BFD8F8",
              "versionEndExcluding": "7.4",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A race condition was addressed with improved locking. This issue is fixed in Security Update 2021-004 Mojave, iOS 14.5 and iPadOS 14.5, watchOS 7.4, Security Update 2021-003 Catalina, tvOS 14.5, macOS Big Sur 11.3. A remote attacker may be able to cause a denial of service."
    },
    {
      "lang": "es",
      "value": "Se abord\u00f3 una condici\u00f3n de carrera con un bloqueo mejorado. Este problema es corregido en Security Update 2021-004 Mojave, iOS versi\u00f3n 14.5 y iPadOS versi\u00f3n 14.5, watchOS versi\u00f3n 7.4, Security Update 2021-003 Catalina, tvOS versi\u00f3n 14.5, macOS Big Sur versi\u00f3n 11.3. Un atacante remoto puede ser capaz de causar una denegaci\u00f3n de servicio"
    }
  ],
  "id": "CVE-2021-1884",
  "lastModified": "2026-06-17T03:32:43.540",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 4.3,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-09-08T15:15:12.567",
  "references": [
    {
      "source": "product-security@apple.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.apple.com/en-us/HT212317"
    },
    {
      "source": "product-security@apple.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.apple.com/en-us/HT212323"
    },
    {
      "source": "product-security@apple.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.apple.com/en-us/HT212324"
    },
    {
      "source": "product-security@apple.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.apple.com/en-us/HT212325"
    },
    {
      "source": "product-security@apple.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.apple.com/en-us/HT212530"
    },
    {
      "source": "product-security@apple.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.apple.com/en-us/HT212531"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.apple.com/en-us/HT212317"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.apple.com/en-us/HT212323"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.apple.com/en-us/HT212324"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.apple.com/en-us/HT212325"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.apple.com/en-us/HT212530"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.apple.com/en-us/HT212531"
    }
  ],
  "sourceIdentifier": "product-security@apple.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-362"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.



Related by attack behaviour

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.