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.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: CERTVDE

Published: 2021-05-13T13:45:24.098776Z

Updated: 2024-09-16T18:29:21.532Z

Reserved: 2020-04-30T00:00:00

Link: CVE-2020-12526

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2021-05-13T14:15:17.457

Modified: 2021-05-25T15:02:14.033

Link: CVE-2020-12526

cve-icon Redhat

No data.