CVE-2020-1066

{"containers": {"cna": {"title": ".NET Framework Elevation of Privilege Vulnerability", "datePublic": "2020-05-12T14:00:00.000Z", "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:.net:*:sp2:*:*:*:*:*:*", "versionStartIncluding": "3.0.0", "versionEndExcluding": "publication"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.5.0", "versionEndExcluding": "publication"}]}]}], "affected": [{"vendor": "Microsoft", "product": "Microsoft .NET Framework 3.0 Service Pack 2", "platforms": ["Windows Server 2008 for 32-bit Systems Service Pack 2", "Windows Server 2008 for x64-based Systems Service Pack 2"], "versions": [{"version": "3.0.0", "lessThan": "publication", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Microsoft .NET Framework 3.5.1", "platforms": ["Windows 7 for 32-bit Systems Service Pack 1", "Windows 7 for x64-based Systems Service Pack 1", "Windows Server 2008 R2 for x64-based Systems Service Pack 1", "Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)"], "versions": [{"version": "3.5.0", "lessThan": "publication", "versionType": "custom", "status": "affected"}]}], "descriptions": [{"value": "An elevation of privilege vulnerability exists in .NET Framework which could allow an attacker to elevate their privilege level.\nTo exploit the vulnerability, an attacker would first have to access the local machine, and then run a malicious program.\nThe update addresses the vulnerability by correcting how .NET Framework activates COM objects.", "lang": "en-US"}], "problemTypes": [{"descriptions": [{"description": "Elevation of Privilege", "lang": "en-US", "type": "Impact"}]}], "providerMetadata": {"orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "shortName": "microsoft", "dateUpdated": "2026-08-19T16:33:31.239Z"}, "references": [{"name": ".NET Framework Elevation of Privilege Vulnerability", "tags": ["vendor-advisory", "patch"], "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1066"}]}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T06:25:00.865Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1066"}]}]}, "cveMetadata": {"assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "assignerShortName": "microsoft", "cveId": "CVE-2020-1066", "datePublished": "2020-05-21T22:52:55.000Z", "dateReserved": "2019-11-04T00:00:00.000Z", "dateUpdated": "2026-08-19T16:33:31.239Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.2"}

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{"affected": [{"affectedData": [{"platforms": ["Windows Server 2008 for 32-bit Systems Service Pack 2", "Windows Server 2008 for x64-based Systems Service Pack 2"], "product": "Microsoft .NET Framework 3.0 Service Pack 2", "vendor": "Microsoft", "versions": [{"lessThan": "publication", "status": "affected", "version": "3.0.0", "versionType": "custom"}]}, {"platforms": ["Windows 7 for 32-bit Systems Service Pack 1", "Windows 7 for x64-based Systems Service Pack 1", "Windows Server 2008 R2 for x64-based Systems Service Pack 1", "Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)"], "product": "Microsoft .NET Framework 3.5.1", "vendor": "Microsoft", "versions": [{"lessThan": "publication", "status": "affected", "version": "3.5.0", "versionType": "custom"}]}], "source": "secure@microsoft.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:microsoft:.net_framework:3.0:sp2:*:*:*:*:*:*", "matchCriteriaId": "D400E856-2B2E-4CEA-8CA5-309FDF371CEA", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*", "matchCriteriaId": "5F422A8C-2C4E-42C8-B420-E0728037E15C", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:microsoft:.net_framework:3.5.1:*:*:*:*:*:*:*", "matchCriteriaId": "8EDC4407-7E92-4E60-82F0-0C87D1860D3A", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:*:*", "matchCriteriaId": "C2B1C231-DE19-4B8F-A4AA-5B3A65276E46", "vulnerable": false}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*", "matchCriteriaId": "AF07A81D-12E5-4B1D-BFF9-C8D08C32FF4F", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An elevation of privilege vulnerability exists in .NET Framework which could allow an attacker to elevate their privilege level.\nTo exploit the vulnerability, an attacker would first have to access the local machine, and then run a malicious program.\nThe update addresses the vulnerability by correcting how .NET Framework activates COM objects."}, {"lang": "es", "value": "Se presenta una vulnerabilidad de elevaci\u00f3n de privilegios en .NET Framework que podr\u00eda permitir a un atacante elevar su nivel de privilegios. Para explotar la vulnerabilidad, un atacante primero tendr\u00eda que acceder a la m\u00e1quina local y luego ejecutar un programa malicioso. La actualizaci\u00f3n aborda la vulnerabilidad al corregir la forma como .NET Framework activa los objetos COM., tambi\u00e9n se conoce como \".NET Framework Elevation of Privilege Vulnerability\"."}], "id": "CVE-2020-1066", "lastModified": "2026-08-19T17:17:12.430", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 4.6, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-05-21T23:15:12.757", "references": [{"source": "secure@microsoft.com", "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1066"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1066"}], "sourceIdentifier": "secure@microsoft.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "NET: local elevation of privilege", "id": "1851857", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1851857"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-250", "details": ["An elevation of privilege vulnerability exists in .NET Framework which could allow an attacker to elevate their privilege level.To exploit the vulnerability, an attacker would first have to access the local machine, and then run a malicious program.The update addresses the vulnerability by correcting how .NET Framework activates COM objects., aka '.NET Framework Elevation of Privilege Vulnerability'."], "name": "CVE-2020-1066", "package_state": [{"cpe": "cpe:/a:redhat:rhel_dotnet:2.1", "fix_state": "Not affected", "package_name": "rh-dotnet21-dotnet", "product_name": ".NET Core 2.1 on Red Hat Enterprise Linux"}, {"cpe": "cpe:/a:redhat:rhel_dotnet:3.1", "fix_state": "Not affected", "package_name": "rh-dotnet31-dotnet", "product_name": ".NET Core 3.1 on Red Hat Enterprise Linux"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "dotnet", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "dotnet31", "product_name": "Red Hat Enterprise Linux 8"}], "public_date": "2020-05-12T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-1066\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-1066\nhttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1066"], "statement": "This only affects the .NET Framework and not .NET Core.", "threat_severity": "Important"}

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