CVE-2018-8435

A security feature bypass vulnerability exists when Windows Hyper-V BIOS loader fails to provide a high-entropy source, aka "Windows Hyper-V Security Feature Bypass Vulnerability." This affects Windows Server 2016, Windows 10, Windows 10 Servers.

CVSS v3 4.2 MEDIUM
CVSS v2.0 2.3 LOW

4.2^/10

CVSS v3 : MEDIUM

Vector : AV:A/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N

Exploitability : 0.5 / Impact : 3.6

Attack Vector ADJACENT_NETWORK

Attack Complexity HIGH

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

2.3^/10

CVSS v2.0 : LOW

Vector : AV:A/AC:M/Au:S/C:N/I:P/A:N

Exploitability : 4.4 / Impact : 2.9

Access Vector ADJACENT_NETWORK

Access Complexity MEDIUM

Authentication SINGLE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
http://www.securityfocus.com/bid/105240	Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1041624	Third Party Advisory VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8435	Patch Vendor Advisory
http://www.securityfocus.com/bid/105240	Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1041624	Third Party Advisory VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8435	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:microsoft:windows_10:-::::::x64:
	cpe:2.3:o:microsoft:windows_10:1607::::::x64:
	cpe:2.3:o:microsoft:windows_10:1703::::::x64:
	cpe:2.3:o:microsoft:windows_10:1709::::::x64:
	cpe:2.3:o:microsoft:windows_10:1803::::::x64:
	cpe:2.3:o:microsoft:windows_server_2016:-:::::::*
	cpe:2.3:o:microsoft:windows_server_2016:1709:::::::*
	cpe:2.3:o:microsoft:windows_server_2016:1803:::::::*

History

No history.

Information

Published : 2018-09-13 00:29

Updated : 2024-11-21 04:13

NVD link : CVE-2018-8435

Mitre link : CVE-2018-8435

CVE.ORG link : CVE-2018-8435

JSON object : View

Products Affected

microsoft

windows_10
windows_server_2016

CWE

CWE-331

Insufficient Entropy

{"id": "CVE-2018-8435", "cveTags": [], "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 2.3, "accessVector": "ADJACENT_NETWORK", "vectorString": "AV:A/AC:M/Au:S/C:N/I:P/A:N", "authentication": "SINGLE", "integrityImpact": "PARTIAL", "accessComplexity": "MEDIUM", "availabilityImpact": "NONE", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "LOW", "obtainAllPrivilege": false, "exploitabilityScore": 4.4, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV30": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 4.2, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.0/AV:A/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "HIGH", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 0.5}]}, "published": "2018-09-13T00:29:03.757", "references": [{"url": "http://www.securityfocus.com/bid/105240", "tags": ["Third Party Advisory", "VDB Entry"], "source": "secure@microsoft.com"}, {"url": "http://www.securitytracker.com/id/1041624", "tags": ["Third Party Advisory", "VDB Entry"], "source": "secure@microsoft.com"}, {"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8435", "tags": ["Patch", "Vendor Advisory"], "source": "secure@microsoft.com"}, {"url": "http://www.securityfocus.com/bid/105240", "tags": ["Third Party Advisory", "VDB Entry"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "http://www.securitytracker.com/id/1041624", "tags": ["Third Party Advisory", "VDB Entry"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8435", "tags": ["Patch", "Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-331"}]}], "descriptions": [{"lang": "en", "value": "A security feature bypass vulnerability exists when Windows Hyper-V BIOS loader fails to provide a high-entropy source, aka \"Windows Hyper-V Security Feature Bypass Vulnerability.\" This affects Windows Server 2016, Windows 10, Windows 10 Servers."}, {"lang": "es", "value": "Existe una vulnerabilidad de omisi\u00f3n de la caracter\u00edstica de seguridad cuando el cargador de BIOS de Windows Hyper-V no puede proporcionar una fuente con alta entrop\u00eda. Esto tambi\u00e9n se conoce como \"Windows Hyper-V Security Feature Bypass Vulnerability\". Esto afecta a Windows Server 2016, Windows 10 y Windows 10 Servers."}], "lastModified": "2024-11-21T04:13:49.340", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "084984D5-D241-497B-B118-50C6C1EAD468"}, {"criteria": "cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "897A48D7-FCA1-4560-AFBB-718AF19BA3A2"}, {"criteria": "cpe:2.3:o:microsoft:windows_10:1703:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "2704BDB7-C9DC-42A6-925D-798568E22D6D"}, {"criteria": "cpe:2.3:o:microsoft:windows_10:1709:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "1B3308A0-1699-4A4A-8D6B-AB4E4C825C95"}, {"criteria": "cpe:2.3:o:microsoft:windows_10:1803:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "1981BA0D-0920-40C0-8A6A-5D5A1B221560"}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "041FF8BA-0B12-4A1F-B4BF-9C4F33B7C1E7"}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2016:1709:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5B454BFE-D3AB-4CDC-B79B-F60EA3F57DBA"}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2016:1803:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CAACE735-003E-4ACB-A82E-C0CF97D7F013"}], "operator": "OR"}]}], "sourceIdentifier": "secure@microsoft.com"}