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
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

21 Nov 2024, 04:59

Type	Values Removed	Values Added
References	~~() https://cert.vde.com/en-us/advisories/vde-2020-051 - Third Party Advisory~~	() https://cert.vde.com/en-us/advisories/vde-2020-051 - Third Party Advisory
References	~~() https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2021-001.pdf - Vendor Advisory~~	() https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2021-001.pdf - Vendor Advisory

Information

Published : 2021-05-13 14:15

Updated : 2024-11-21 04:59

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
tf6100
ipc_diagnostics_ua_server

CWE

CWE-20

Improper Input Validation

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