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FKIE_CVE-2021-30843

Vulnerability from fkie_nvd - Published: 2021-10-19 14:15 - Updated: 2026-06-17 03:50
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Summary
This issue was addressed with improved checks. This issue is fixed in iOS 14.8 and iPadOS 14.8, macOS Big Sur 11.6, Security Update 2021-005 Catalina, tvOS 15, iOS 15 and iPadOS 15, watchOS 8. Processing a maliciously crafted dfont file may lead to arbitrary code execution.
References
product-security@apple.comhttp://seclists.org/fulldisclosure/2021/Oct/61Mailing List, Release Notes, Third Party Advisory
product-security@apple.comhttp://seclists.org/fulldisclosure/2021/Oct/62Mailing List, Release Notes, Third Party Advisory
product-security@apple.comhttp://seclists.org/fulldisclosure/2021/Oct/63Mailing List, Release Notes, Third Party Advisory
product-security@apple.comhttps://support.apple.com/en-us/HT212804Release Notes, Vendor Advisory
product-security@apple.comhttps://support.apple.com/en-us/HT212805Release Notes, Vendor Advisory
product-security@apple.comhttps://support.apple.com/en-us/HT212807Release Notes, Vendor Advisory
product-security@apple.comhttps://support.apple.com/en-us/HT212814Release Notes, Vendor Advisory
product-security@apple.comhttps://support.apple.com/en-us/HT212815Release Notes, Vendor Advisory
product-security@apple.comhttps://support.apple.com/en-us/HT212819Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2021/Oct/61Mailing List, Release Notes, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2021/Oct/62Mailing List, Release Notes, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2021/Oct/63Mailing List, Release Notes, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT212804Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT212805Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT212807Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT212814Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT212815Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT212819Release Notes, Vendor Advisory
Impacted products
Vendor Product Version
apple ipados *
apple iphone_os *
apple mac_os_x *
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 mac_os_x 10.15.7
apple mac_os_x 10.15.7
apple macos *
apple tvos *
apple watchos *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "macOS",
          "vendor": "Apple",
          "versions": [
            {
              "lessThan": "11.6",
              "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": "14.8",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "macOS",
          "vendor": "Apple",
          "versions": [
            {
              "lessThan": "15",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "macOS",
          "vendor": "Apple",
          "versions": [
            {
              "lessThan": "15",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "macOS",
          "vendor": "Apple",
          "versions": [
            {
              "lessThan": "8",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "product-security@apple.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "FCD67B72-0B1D-46A8-A149-8149ED749FEC",
              "versionEndExcluding": "14.8",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "56F86481-D995-43D7-982F-5DC6E4682A65",
              "versionEndExcluding": "14.8",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "141A3268-DBD7-4F40-8BE4-CF8D9A0DF3E1",
              "versionEndIncluding": "10.15.6",
              "versionStartIncluding": "10.15",
              "vulnerable": true
            },
            {
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              "vulnerable": true
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              "vulnerable": true
            },
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            },
            {
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              "matchCriteriaId": "B32A978E-673C-421D-93A1-CA84D90B67E4",
              "versionEndExcluding": "15.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "5364285F-B3F2-465B-B738-2FC1C8913A44",
              "versionEndExcluding": "8.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "This issue was addressed with improved checks. This issue is fixed in iOS 14.8 and iPadOS 14.8, macOS Big Sur 11.6, Security Update 2021-005 Catalina, tvOS 15, iOS 15 and iPadOS 15, watchOS 8. Processing a maliciously crafted dfont file may lead to arbitrary code execution."
    },
    {
      "lang": "es",
      "value": "Este problema Se abord\u00f3 con comprobaciones mejoradas. Este problema es corregido en iOS versi\u00f3n 14.8 y iPadOS versi\u00f3n 14.8, macOS Big Sur versi\u00f3n 11.6, Security Update 2021-005 Catalina, tvOS versi\u00f3n 15, iOS versi\u00f3n 15 y iPadOS versi\u00f3n 15, watchOS versi\u00f3n 8. El procesamiento de un archivo dfont maliciosamente dise\u00f1ado puede conllevar a una ejecuci\u00f3n de c\u00f3digo arbitrario"
    }
  ],
  "id": "CVE-2021-30843",
  "lastModified": "2026-06-17T03:50:59.510",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 6.8,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 6.4,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-10-19T14:15:09.463",
  "references": [
    {
      "source": "product-security@apple.com",
      "tags": [
        "Mailing List",
        "Release Notes",
        "Third Party Advisory"
      ],
      "url": "http://seclists.org/fulldisclosure/2021/Oct/61"
    },
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    },
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  ],
  "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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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.


Detection rules are retrieved from Rulezet.


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.