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5.3
CVSSv3

CVE-2020-12526

Published: 13/05/2021 Updated: 25/05/2021
CVSS v2 Base Score: 5 | Impact Score: 2.9 | Exploitability Score: 10
CVSS v3 Base Score: 5.3 | Impact Score: 1.4 | Exploitability Score: 3.9
VMScore: 445
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
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Vulnerability Summary

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.

Vulnerability Trend

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beckhoff ipc diagnostics ua server

beckhoff tf6100

beckhoff twincat opc ua server

References

CWE-20https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2021-001.pdfhttps://cert.vde.com/en-us/advisories/vde-2020-051https://nvd.nist.gov
CVSSv3
CVSSv2
CVSSv3
VMScore
Recommendations:
CVE-2024-27322cross-site request forgeryunauthorizedCVE-2024-33925reflected XSSCVE-2023-51580CVE-2023-51579CVE-2015-2051CVE-2023-51609
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