FKIE_CVE-2021-30977
Vulnerability from fkie_nvd - Published: 2021-08-24 19:15 - Updated: 2026-06-17 03:51
Severity
Summary
A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Monterey 12.1, Security Update 2021-008 Catalina, macOS Big Sur 11.6.2. A malicious application may be able to execute arbitrary code with kernel privileges.
References
Impacted products
{
"affected": [
{
"affectedData": [
{
"product": "macOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "12.1",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
},
{
"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"
}
]
}
],
"source": "product-security@apple.com"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"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:10.15.7:-:*:*:*:*:*:*",
"matchCriteriaId": "A654B8A2-FC30-4171-B0BB-366CD7ED4B6A",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-001:*:*:*:*:*:*",
"matchCriteriaId": "F1F4BF7F-90D4-4668-B4E6-B06F4070F448",
"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:security_update_2021-003:*:*:*:*:*:*",
"matchCriteriaId": "A54D63B7-B92B-47C3-B1C5-9892E5873A98",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-004:*:*:*:*:*:*",
"matchCriteriaId": "3456176F-9185-4EE2-A8CE-3D989D674AB7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-005:*:*:*:*:*:*",
"matchCriteriaId": "D337EE21-2F00-484D-9285-F2B0248D7A19",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-006:*:*:*:*:*:*",
"matchCriteriaId": "012052B5-9AA7-4FD3-9C80-5F615330039D",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-007:*:*:*:*:*:*",
"matchCriteriaId": "50F21A3C-0AC3-48C5-A4F8-5A7B478875B4",
"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": "287EBE44-07C0-41D3-B268-CC86CA5FD792",
"versionEndExcluding": "11.6.2",
"versionStartIncluding": "11.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*",
"matchCriteriaId": "9C72309C-939F-4744-80DB-07C4452BDAFE",
"versionEndExcluding": "12.3",
"versionStartIncluding": "12.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Monterey 12.1, Security Update 2021-008 Catalina, macOS Big Sur 11.6.2. A malicious application may be able to execute arbitrary code with kernel privileges."
},
{
"lang": "es",
"value": "Se abord\u00f3 un desbordamiento de b\u00fafer con una comprobaci\u00f3n de l\u00edmites mejorada.\u0026#xa0;Este problema es corregido en macOS Monterey versi\u00f3n 12.1, Security Update 2021-008 Catalina, macOS Big Sur versi\u00f3n 11.6.2.\u0026#xa0;Una aplicaci\u00f3n maliciosa puede ejecutar c\u00f3digo arbitrario con privilegios de kernel"
}
],
"id": "CVE-2021-30977",
"lastModified": "2026-06-17T03:51:15.027",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "HIGH",
"cvssData": {
"accessComplexity": "MEDIUM",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "COMPLETE",
"baseScore": 9.3,
"confidentialityImpact": "COMPLETE",
"integrityImpact": "COMPLETE",
"vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C",
"version": "2.0"
},
"exploitabilityScore": 8.6,
"impactScore": 10.0,
"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": "2021-08-24T19:15:23.253",
"references": [
{
"source": "product-security@apple.com",
"url": "https://support.apple.com/en-us/HT212978"
},
{
"source": "product-security@apple.com",
"url": "https://support.apple.com/en-us/HT212979"
},
{
"source": "product-security@apple.com",
"url": "https://support.apple.com/en-us/HT212981"
},
{
"source": "product-security@apple.com",
"url": "https://support.apple.com/kb/HT213183"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://support.apple.com/en-us/HT212978"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://support.apple.com/en-us/HT212979"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://support.apple.com/en-us/HT212981"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://support.apple.com/kb/HT213183"
}
],
"sourceIdentifier": "product-security@apple.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-120"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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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.
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