Detections
Analytics

Beckhoff TwinCAT OPC UA Server Path Traversal (CVE-2021-34594)

medium Tenable OT Security Plugin ID 500516

Synopsis

The remote OT asset is affected by a vulnerability.

Description

TwinCAT OPC UA Server in TF6100 and TS6100 in product versions before 4.3.48.0 or with TcOpcUaServer versions below 3.2.0.194 are prone to a relative path traversal that allow administrators to create or delete any files on the system.
This plugin only works with Tenable.ot. Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

Refer to the vendor advisory.

See Also

https://cert.vde.com/en/advisories/VDE-2021-051/

Plugin Details

Severity: Medium

ID: 500516

Version: 1.4

Type: remote

Family: Tenable.ot

Published: 2/7/2022

Updated: 11/13/2023

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.3

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:C/A:C

CVSS Score Source: CVE-2021-34594

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:beckhoff:tf6100_firmware, cpe:/o:beckhoff:ts6100_firmware

Required KB Items: Tenable.ot/Beckhoff

Exploit Ease: No known exploits are available

Patch Publication Date: 11/4/2021

Vulnerability Publication Date: 11/4/2021

Reference Information

CVE: CVE-2021-34594

CWE: 22