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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
5.3MEDIUM
NVD MITRE
EPSS Score
1.0%
Top 41.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not 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.

No summary for this CVE yet.

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

Beckhoff Automation GmbH & Co. KG
commercial·DEaka twincat, beckhoff
TwinCAT OPC UA ServerMixed
ICS / OT / IoT / plc-scada-hmi
IPC Diagnostics UA ServerMixed
ICS / OT / IoT / plc-scada-hmi
TF6100Mixed
ICS / OT / IoT / plc-scada-hmi
Beckhoff
commercialaka twincat, twincat/bsd
IPC Diagnostics UA ServerEmbedded
ICS / OT / IoT / plc-scada-hmi
TF6100Embedded
ICS / OT / IoT / plc-scada-hmi
TwinCAT OPC UA ServerEmbedded
ICS / OT / IoT / plc-scada-hmi
and 3 more affected products View all →

Exploitability

Official Patch Available
Workaround Available

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

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

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