BECKHOFF: DoS-Vulnerability for TwinCAT OPC UA Server and IPC Diagnostics UA Server
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
5<=2.3.0.12+ 1 more
- (no CPE)range: <=2.3.0.12
- (no CPE)range: unspecified
<=3.1.0.1+ 1 more
- (no CPE)range: <=3.1.0.1
- (no CPE)range: unspecified
- Beckhoff/TF6100v5Range: unspecified
Patches
Vulnerability mechanics
No source-code context for this CVE — mechanics is only generated when we can read the actual fix diff. Without that, the four sections (root cause, attack vector, affected code, fix) would be speculation rather than analysis.
References
2- cert.vde.com/en-us/advisories/vde-2020-051mitrex_refsource_CONFIRM
- download.beckhoff.com/download/Document/product-security/Advisories/advisory-2021-001.pdfmitrex_refsource_CONFIRM
News mentions
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