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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.010 (60.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
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
- cert.vde.com/en-us/advisories/vde-2020-051 (Third Party Advisory)
- download.beckhoff.com/download/Document/product-security/Advisories/advisory-20… (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.