Beckhoff Ipc Improper Input Validation

medium Tenable.ot Plugin ID 500433
New! Plugin Severity Now Using CVSS v3

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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.

Solution

Refer to vendor advisory for Security Updates

See Also

https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2021-001.pdf

https://cert.vde.com/en-us/advisories/vde-2020-051

Plugin Details

Severity: Medium

ID: 500433

Version: 1.0

Type: local

Family: SCADA

Published: 8/10/2021

Updated: 8/10/2021

Risk Information

CVSS Score Source: CVE-2020-12526

CVSS v2

Risk Factor: Medium

Base Score: 5

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Vulnerability Information

CPE: cpe:2.3:a:beckhoff:ipc_diagnostics_ua_server:*:*:*:*:*:*:*:*, cpe:2.3:a:beckhoff:tf6100:*:*:*:*:*:*:*:*, cpe:2.3:a:beckhoff:twincat_opc_ua_server:*:*:*:*:*:*:*:*

Patch Publication Date: 5/13/2021

Vulnerability Publication Date: 5/13/2021

Reference Information

CVE: CVE-2020-12526