CVE-2020-12526

TwinCAT OPC UA Server in versions up to 2.3.0.12 and IPC Diagnostics UA Server in versions up to 3.1.0.1 from Beckhoff Automation GmbH & Co. KG are vulnerable to denial of service attacks. The attacker needs to send several specifically crafted requests to the running OPC UA server. After some of these requests the OPC UA server is no longer responsive to any client. This is without effect to the real-time functionality of IPCs.

CVSS v3 5.3 MEDIUM
CVSS v2.0 5.0 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://cert.vde.com/en-us/advisories/vde-2020-051	Third Party Advisory
https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2021-001.pdf	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:beckhoff:ipc_diagnostics_ua_server::::::::
	cpe:2.3:a:beckhoff:tf6100::::::::
	cpe:2.3:a:beckhoff:twincat_opc_ua_server::::::::

History

No history.

Information

Published : 2021-05-13 14:15

Updated : 2024-02-28 18:28

NVD link : CVE-2020-12526

Mitre link : CVE-2020-12526

CVE.ORG link : CVE-2020-12526

JSON object : View

Products Affected

beckhoff

twincat_opc_ua_server
ipc_diagnostics_ua_server
tf6100

CWE

CWE-20

Improper Input Validation

{"id": "CVE-2020-12526", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 5.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}, {"type": "Secondary", "source": "info@cert.vde.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "published": "2021-05-13T14:15:17.457", "references": [{"url": "https://cert.vde.com/en-us/advisories/vde-2020-051", "tags": ["Third Party Advisory"], "source": "info@cert.vde.com"}, {"url": "https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2021-001.pdf", "tags": ["Vendor Advisory"], "source": "info@cert.vde.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-20"}]}, {"type": "Secondary", "source": "info@cert.vde.com", "description": [{"lang": "en", "value": "CWE-20"}]}], "descriptions": [{"lang": "en", "value": "TwinCAT OPC UA Server in versions up to 2.3.0.12 and IPC Diagnostics UA Server in versions up to 3.1.0.1 from Beckhoff Automation GmbH & Co. KG are vulnerable to denial of service attacks. The attacker needs to send several specifically crafted requests to the running OPC UA server. After some of these requests the OPC UA server is no longer responsive to any client. This is without effect to the real-time functionality of IPCs."}, {"lang": "es", "value": "TwinCAT OPC UA Server en versiones hasta 2.3.0.12 e IPC Diagnostics UA Server en versiones hasta 3.1.0.1 de Beckhoff Automation GmbH & Co. KG son vulnerables a ataques de denegaci\u00f3n de servicio. El atacante necesita enviar varias peticiones dise\u00f1adas espec\u00edficamente al servidor OPC UA en ejecuci\u00f3n. Despu\u00e9s de algunas de estas peticiones, el servidor OPC UA ya no responde a ning\u00fan cliente. Esto no afecta a la funcionalidad en tiempo real de los IPC"}], "lastModified": "2021-05-25T15:02:14.033", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:beckhoff:ipc_diagnostics_ua_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F2F63E85-BE46-46AE-BED7-5D4963672BEE", "versionEndIncluding": "3.1.0.1"}, {"criteria": "cpe:2.3:a:beckhoff:tf6100:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5BE81331-ED73-4B59-BE98-E064A2C32B02", "versionEndIncluding": "3.3.18"}, {"criteria": "cpe:2.3:a:beckhoff:twincat_opc_ua_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FFE1FF2F-5E28-4114-BCD5-B33B3898901E", "versionEndIncluding": "2.3.0.12"}], "operator": "OR"}]}], "sourceIdentifier": "info@cert.vde.com"}