Vulnerability-Lookup

FKIE_CVE-2021-1784

Vulnerability from fkie_nvd - Published: 2021-09-08 15:15 - Updated: 2026-06-17 03:32

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Summary

A permissions issue existed in DiskArbitration. This was addressed with additional ownership checks. This issue is fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina, Security Update 2021-003 Mojave. A malicious application may be able to modify protected parts of the file system.

References

URL	Tags
product-security@apple.com	https://support.apple.com/en-us/HT212325	Vendor Advisory
product-security@apple.com	https://support.apple.com/en-us/HT212326	Vendor Advisory
product-security@apple.com	https://support.apple.com/en-us/HT212327	Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://support.apple.com/en-us/HT212325	Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://support.apple.com/en-us/HT212326	Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://support.apple.com/en-us/HT212327	Vendor Advisory

Impacted products

Vendor	Product	Version
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	10.15.6
apple	mac_os_x	10.15.6
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	macos	*

JSON

To clipboard

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          "vendor": "Apple",
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            {
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              "versionStartIncluding": "11.0",
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A permissions issue existed in DiskArbitration. This was addressed with additional ownership checks. This issue is fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina, Security Update 2021-003 Mojave. A malicious application may be able to modify protected parts of the file system."
    },
    {
      "lang": "es",
      "value": "Se presentaba un problema de permisos en DiskArbitration. Se abord\u00f3 con comprobaciones de propiedad adicionales. Este problema se corrigi\u00f3 en macOS Big Sur versi\u00f3n 11.3, Security Update 2021-002 Catalina, Security Update 2021-003 Mojave. Una aplicaci\u00f3n maliciosa puede ser capaz de modificar partes protegidas del sistema de archivos"
    }
  ],
  "id": "CVE-2021-1784",
  "lastModified": "2026-06-17T03:32:33.330",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 5.0,
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
          "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": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-09-08T15:15:09.340",
  "references": [
    {
      "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/HT212326"
    },
    {
      "source": "product-security@apple.com",
      "tags": [
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      "url": "https://support.apple.com/en-us/HT212327"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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      "url": "https://support.apple.com/en-us/HT212325"
    },
    {
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  ],
  "sourceIdentifier": "product-security@apple.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
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          "value": "NVD-CWE-Other"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2021-1784 (GCVE-0-2021-1784)

Vulnerability from cvelistv5 – Published: 2021-09-08 14:56 – Updated: 2024-08-03 16:25

Summary

Severity

No CVSS data available.

CWE

A malicious application may be able to modify protected parts of the file system

Assigner

apple mitre root

References

3 references

URL	Tags
https://support.apple.com/en-us/HT212325	x_refsource_MISC
https://support.apple.com/en-us/HT212326	x_refsource_MISC
https://support.apple.com/en-us/HT212327	x_refsource_MISC

Impacted products

2 products

Vendor	Product	Version
Apple	macOS	Affected: unspecified , < 11.3 (custom)
Apple	macOS	Affected: unspecified , < 2021 (custom)

Show details on NVD website

JSON

To clipboard

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              "x_refsource_MISC",
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            "url": "https://support.apple.com/en-us/HT212327"
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        ],
        "title": "CVE Program Container"
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    "cna": {
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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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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.

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FKIE_CVE-2021-1784

CVE-2021-1784 (GCVE-0-2021-1784)

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