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CVE-2021-34594— Beckhoff: Relative path traversal vulnerability through TwinCAT OPC UA Server

Quick assessment

Affected
Beckhoff Automation TwinCAT OPC UA Server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Beckhoff Automation TwinCat Opc Ua Server是德国Beckhoff Automation公司的一种独立于平台、面向服务的通信架构。用于从生产级到生产计划和 Erp 系统或云的可靠、安全和多供应商数据传输。 Beckhoff Automation TwinCAT OPC UA Server 存在路径遍历漏洞，该漏洞源于 TwinCAT OPC UA Server 容易发生相对路径遍历，允许管理员创建或删除系统上的任何文件。

CVSS 6.5 · Medium EPSS 1.09% · P63
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I. Basic Information for CVE-2021-34594

Vulnerability Information
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Vulnerability Title
Beckhoff: Relative path traversal vulnerability through TwinCAT OPC UA Server
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
相对路径遍历
Source: CVE Program / CVE List V5
Vulnerability Title
Beckhoff Automation TwinCat Opc Ua Server 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Beckhoff Automation TwinCat Opc Ua Server是德国Beckhoff Automation公司的一种独立于平台、面向服务的通信架构。用于从生产级到生产计划和 Erp 系统或云的可靠、安全和多供应商数据传输。 Beckhoff Automation TwinCAT OPC UA Server 存在路径遍历漏洞，该漏洞源于 TwinCAT OPC UA Server 容易发生相对路径遍历，允许管理员创建或删除系统上的任何文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Beckhoff Automation TwinCAT OPC UA Server TF6100 ~ 4.3.48.0 -

II. Public POCs for CVE-2021-34594

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III. Intelligence Information for CVE-2021-34594

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Other References for CVE-2021-34594 (1)

IV. Related Vulnerabilities

Same product: TwinCAT OPC UA Server
Same vendor: Beckhoff Automation
Same weakness: CWE-23

V. Comments for CVE-2021-34594

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