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CVE-2019-5637— Beckhoff TwinCAT Profinet Driver Divide-by-Zero Denial of Service

Quick assessment

Affected
Beckhoff TwinCAT 2
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 TwinCAT是德国Beckhoff公司的一套由实时环境和在开发环境中执行控制程序的实时系统组成的软件系统。该系统主要用于PLC（可编程逻辑控制器）编程、诊断和系统配置等。 Beckhoff TwinCAT 2 Build 2304及之前版本和3.1 Build 4024.0及之前版本中存在数字错误漏洞。攻击者可通过发送畸形的UDP数据包利用该漏洞造成拒绝服务。

CVSS 7.5 · High EPSS 1.43% · P72

Possible ATT&CK Techniques 1 AI

T1029 · Scheduled Transfer
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I. Basic Information for CVE-2019-5637

Vulnerability Information
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Vulnerability Title
Beckhoff TwinCAT Profinet Driver Divide-by-Zero Denial of Service
Source: CVE Program / CVE List V5
Vulnerability Description
When Beckhoff TwinCAT is configured to use the Profinet driver, a denial of service of the controller could be reached by sending a malformed UDP packet to the device. This issue affects TwinCAT 2 version 2304 (and prior) and TwinCAT 3.1 version 4204.0 (and prior).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
除零错误
Source: CVE Program / CVE List V5
Vulnerability Title
Beckhoff TwinCAT 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Beckhoff TwinCAT是德国Beckhoff公司的一套由实时环境和在开发环境中执行控制程序的实时系统组成的软件系统。该系统主要用于PLC（可编程逻辑控制器）编程、诊断和系统配置等。 Beckhoff TwinCAT 2 Build 2304及之前版本和3.1 Build 4024.0及之前版本中存在数字错误漏洞。攻击者可通过发送畸形的UDP数据包利用该漏洞造成拒绝服务。
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 TwinCAT 2 2304 ~ 2304 -
Beckhoff TwinCAT 3.1 4204.0 ~ 4204.0 -

II. Public POCs for CVE-2019-5637

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III. Intelligence Information for CVE-2019-5637

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Security Blog Posts for CVE-2019-5637 (1)

Other References for CVE-2019-5637 (1)

IV. Related Vulnerabilities

Same product: TwinCAT 2
Same vendor: Beckhoff
Same weakness: CWE-369

V. Comments for CVE-2019-5637

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