CVE-2020-27648

Improper certificate validation vulnerability in OpenVPN client in Synology DiskStation Manager (DSM) before 6.2.3-25426-2 allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

CVSS v3 8.3 HIGH
CVSS v2.0 6.8 MEDIUM

8.3^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.6 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

6.8^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 8.6 / Impact : 6.4

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://www.synology.com/security/advisory/Synology_SA_20_18	Vendor Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1058	Exploit Third Party Advisory
https://www.synology.com/security/advisory/Synology_SA_20_18	Vendor Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1058	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:synology:diskstation_manager:*:*:*:*:*:*:*:*

Configuration 2 (hide)

AND

cpe:2.3:o:synology:skynas_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:synology:skynas:-:*:*:*:*:*:*:*

History

21 Nov 2024, 05:21

Type	Values Removed	Values Added
References	~~() https://www.synology.com/security/advisory/Synology_SA_20_18 - Vendor Advisory~~	() https://www.synology.com/security/advisory/Synology_SA_20_18 - Vendor Advisory
References	~~() https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1058 - Exploit, Third Party Advisory~~	() https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1058 - Exploit, Third Party Advisory
CVSS	v2 : ~~6.8~~ v3 : ~~9.0~~	v2 : 6.8 v3 : 8.3

Information

Published : 2020-10-29 09:15

Updated : 2024-11-21 05:21

NVD link : CVE-2020-27648

Mitre link : CVE-2020-27648

CVE.ORG link : CVE-2020-27648

JSON object : View

Products Affected

synology

skynas
skynas_firmware
diskstation_manager

CWE

CWE-295

Improper Certificate Validation

{"id": "CVE-2020-27648", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 6.8, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "MEDIUM", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 6.4, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 8.6, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Secondary", "source": "security@synology.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.3, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 1.6}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.0, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 2.2}]}, "published": "2020-10-29T09:15:12.573", "references": [{"url": "https://www.synology.com/security/advisory/Synology_SA_20_18", "tags": ["Vendor Advisory"], "source": "security@synology.com"}, {"url": "https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1058", "tags": ["Exploit", "Third Party Advisory"], "source": "security@synology.com"}, {"url": "https://www.synology.com/security/advisory/Synology_SA_20_18", "tags": ["Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1058", "tags": ["Exploit", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "security@synology.com", "description": [{"lang": "en", "value": "CWE-295"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-295"}]}], "descriptions": [{"lang": "en", "value": "Improper certificate validation vulnerability in OpenVPN client in Synology DiskStation Manager (DSM) before 6.2.3-25426-2 allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate."}, {"lang": "es", "value": "Una vulnerabilidad de comprobaci\u00f3n inapropiada del certificado en OpenVPN client en Synology DiskStation Manager (DSM) versiones anteriores a 6.2.3-25426-2, permite a atacantes de tipo man-in-the-middle falsificar servidores y obtener informaci\u00f3n confidencial por medio de un certificado dise\u00f1ado"}], "lastModified": "2024-11-21T05:21:35.197", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:synology:diskstation_manager:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "64736643-3C6B-4F39-8227-95967BA60AF4", "versionEndExcluding": "6.2.3-25426-2", "versionStartIncluding": "6.2"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:synology:skynas_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9AE10225-4803-4190-91E0-C0E714A9EE4E", "versionEndExcluding": "6.2.3-25426"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:synology:skynas:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "D0A88A76-CF8A-4D29-B480-E5317219072D"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "security@synology.com"}