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CVE-2020-12526

MEDIUM

5.3

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.

CVE Details

CVSS v3.1 Score5.3

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published5/13/2021

Last Modified11/21/2024

Sourcenvd

Honeypot Sightings0

Affected Products

beckhoff:ipc_diagnostics_ua_serverbeckhoff:tf6100beckhoff:twincat_opc_ua_server

Weaknesses (CWE)

CWE-20CWE-20

References

https://cert.vde.com/en-us/advisories/vde-2020-051(info@cert.vde.com)

https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2021-001.pdf(info@cert.vde.com)

https://cert.vde.com/en-us/advisories/vde-2020-051(af854a3a-2127-422b-91ae-364da2661108)

https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2021-001.pdf(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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