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CVE-2020-12526

BECKHOFF: DoS-Vulnerability for TwinCAT OPC UA Server and IPC Diagnostics UA Server

Published: May 13, 2021Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-20
NVD MITRE
5.3CVSSMEDIUM
EPSS Score
1.0%
Top 43.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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 Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
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Weaknesses

CWE-20

Affected Products

ipc diagnostics ua serverbeckhoff
Embedded
ICS / OT / IoT / plc-scada-hmi
tf6100beckhoff
Embedded
ICS / OT / IoT / plc-scada-hmi
twincat opc ua serverbeckhoff
Embedded
ICS / OT / IoT / plc-scada-hmi
TwinCAT OPC UA ServerBeckhoff
Embedded
ICS / OT / IoT / plc-scada-hmi
IPC Diagnostics UA ServerBeckhoff
Embedded
ICS / OT / IoT / plc-scada-hmi
beckhoffcommercialICS / OT / IoTaka twincat, twincat/bsd
and 4 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available
Workaround Available

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://cert.vde.com/en-us/advisories/vde-2020-051
cert.vde.com
https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2021-001.pdf
download.beckhoff.com

Timeline

Published
May 13, 2021
Last Updated
Nov 21, 2024

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