CVE-2021-30855

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This issue is fixed in Security Update 2021-005 Catalina, iOS 14.8 and iPadOS 14.8, iOS 15 and iPadOS 15, watchOS 8, macOS Big Sur 11.6. An application may be able to access restricted files."}], "problemTypes": [{"descriptions": [{"description": "An application may be able to access restricted files", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2022-01-20T20:06:38.000Z", "orgId": "286789f9-fbc2-4510-9f9a-43facdede74c", "shortName": "apple"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://support.apple.com/en-us/HT212804"}, {"tags": ["x_refsource_MISC"], "url": "https://support.apple.com/en-us/HT212805"}, {"tags": ["x_refsource_MISC"], "url": "https://support.apple.com/en-us/HT212807"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://support.apple.com/kb/HT212815"}, {"tags": ["x_refsource_MISC"], "url": "https://support.apple.com/en-us/HT212814"}, {"tags": ["x_refsource_MISC"], "url": "https://support.apple.com/en-us/HT212819"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "product-security@apple.com", "ID": "CVE-2021-30855", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "macOS", "version": {"version_data": [{"version_affected": "<", "version_value": "11.6"}]}}, {"product_name": "macOS", "version": {"version_data": [{"version_affected": "<", "version_value": "2021"}]}}, {"product_name": "macOS", "version": {"version_data": [{"version_affected": "<", "version_value": "14.8"}]}}, {"product_name": "macOS", "version": {"version_data": [{"version_affected": "<", "version_value": "15"}]}}, {"product_name": "macOS", "version": {"version_data": [{"version_affected": "<", "version_value": "8"}]}}]}, "vendor_name": "Apple"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "A validation issue existed in the handling of symlinks. This issue was addressed with improved validation of symlinks. This issue is fixed in Security Update 2021-005 Catalina, iOS 14.8 and iPadOS 14.8, iOS 15 and iPadOS 15, watchOS 8, macOS Big Sur 11.6. An application may be able to access restricted files."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "An application may be able to access restricted files"}]}]}, "references": {"reference_data": [{"name": "https://support.apple.com/en-us/HT212804", "refsource": "MISC", "url": "https://support.apple.com/en-us/HT212804"}, {"name": "https://support.apple.com/en-us/HT212805", "refsource": "MISC", "url": "https://support.apple.com/en-us/HT212805"}, {"name": "https://support.apple.com/en-us/HT212807", "refsource": "MISC", "url": "https://support.apple.com/en-us/HT212807"}, {"name": "https://support.apple.com/kb/HT212815", "refsource": "CONFIRM", "url": "https://support.apple.com/kb/HT212815"}, {"name": "https://support.apple.com/en-us/HT212814", "refsource": "MISC", "url": "https://support.apple.com/en-us/HT212814"}, {"name": "https://support.apple.com/en-us/HT212819", "refsource": "MISC", "url": "https://support.apple.com/en-us/HT212819"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T22:48:13.886Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://support.apple.com/en-us/HT212804"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://support.apple.com/en-us/HT212805"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://support.apple.com/en-us/HT212807"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://support.apple.com/kb/HT212815"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://support.apple.com/en-us/HT212814"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://support.apple.com/en-us/HT212819"}]}]}, "cveMetadata": {"assignerOrgId": "286789f9-fbc2-4510-9f9a-43facdede74c", "assignerShortName": "apple", "cveId": "CVE-2021-30855", "datePublished": "2021-08-24T18:49:21.000Z", "dateReserved": "2021-04-13T00:00:00.000Z", "dateUpdated": "2024-08-03T22:48:13.886Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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This issue was addressed with improved validation of symlinks. This issue is fixed in Security Update 2021-005 Catalina, iOS 14.8 and iPadOS 14.8, iOS 15 and iPadOS 15, watchOS 8, macOS Big Sur 11.6. An application may be able to access restricted files."}, {"lang": "es", "value": "Se present\u00f3 un problema de comprobaci\u00f3n en el manejo de los enlaces simb\u00f3licos. Este problema se abord\u00f3 con una comprobaci\u00f3n de enlaces simb\u00f3licos mejorada. Este problema se corrigi\u00f3 en Security Update 2021-005 Catalina, iOS versi\u00f3n 14.8 y iPadOS versi\u00f3n 14.8, iOS versi\u00f3n 15 y iPadOS versi\u00f3n 15, watchOS versi\u00f3n 8, macOS Big Sur versi\u00f3n 11.6. Una aplicaci\u00f3n podr\u00eda acceder a archivos restringidos"}], "id": "CVE-2021-30855", "lastModified": "2026-06-17T03:51:01.140", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 4.3, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-08-24T19:15:14.020", "references": [{"source": "product-security@apple.com", "url": "https://support.apple.com/en-us/HT212804"}, {"source": "product-security@apple.com", "url": "https://support.apple.com/en-us/HT212805"}, {"source": "product-security@apple.com", "url": "https://support.apple.com/en-us/HT212807"}, {"source": "product-security@apple.com", "url": "https://support.apple.com/en-us/HT212814"}, {"source": "product-security@apple.com", "url": "https://support.apple.com/en-us/HT212819"}, {"source": "product-security@apple.com", "url": "https://support.apple.com/kb/HT212815"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://support.apple.com/en-us/HT212804"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://support.apple.com/en-us/HT212805"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://support.apple.com/en-us/HT212807"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://support.apple.com/en-us/HT212814"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://support.apple.com/en-us/HT212819"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://support.apple.com/kb/HT212815"}], "sourceIdentifier": "product-security@apple.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-59"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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