CVE-2020-12526CWE-20

BECKHOFF: DoS-Vulnerability for TwinCAT OPC UA Server and IPC Diagnostics UA Server

Medium · published May 13, 2021

CVSS v3.1
5.3
EPSS
1%
Percentile
61.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS v4.0
Not supplied
EPSS
0.00955 · 61.0th percentile
Weakness
CWE-20 · Improper Input Validation
Published
2021-05-13T13:45Z
EPSS history
Timeline
  • 13 MAY 13:45Z
    BECKHOFF: DoS-Vulnerability for TwinCAT OPC UA Server and IPC Diagnostics UA Server
    cvelistv5