CVE-2020-12526

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Summary

CVECVE-2020-12526
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-05-13 14:15:00 UTC
Updated2021-05-25 15:02:00 UTC
DescriptionTwinCAT 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.

Risk And Classification

Problem Types: CWE-20

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Beckhoff Ipc Diagnostics Ua Server All All All All
Application Beckhoff Tf6100 All All All All
Application Beckhoff Twincat Opc Ua Server All All All All

References

ReferenceSourceLinkTags
BECKHOFF: DoS-Vulnerability for TwinCAT OPC UA Server and IPC Diagnostics UA Server — English (USA) CONFIRM cert.vde.com
download.beckhoff.com/download/Document/product-security/Advisories/advisory-2021-0... CONFIRM download.beckhoff.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

LEGACY: Beckhoff Automation thanks Industrial Control Security Laboratory of QI-ANXIN Technology Group Inc. from China for reporting the issue and for support and efforts with the coordinated disclosure. Also Beckhoff Automation thanks CERT@VDE for coordination.

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