Improper input validation in Beckhoff Ipc Diagnostics Ua Server
CVE-2020-12526
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 class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.010 (57.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Beckhoff Ipc Diagnostics Ua Server — versions unspecified
- Beckhoff Ipc_diagnostics_ua_server
- Beckhoff Tf6100 — versions unspecified
- Beckhoff Twincat Opc Ua Server — versions unspecified
- Beckhoff Twincat_opc_ua_server
Weakness classification (CWE)
References
- info@cert.vde.com (x_refsource_CONFIRM, Third Party Advisory)
- info@cert.vde.com (x_refsource_CONFIRM, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-12526?
- CVE-2020-12526 is a medium-severity vulnerability in Beckhoff Ipc Diagnostics Ua Server, classified under Improper Input Validation. CVSS score: 5.3/10. Published 2021-05-13.
- How severe is CVE-2020-12526?
- Medium severity. CVSS v3 base score is 5.3 out of 10.