Input validation error in TwinCAT - CVE-2019-16871

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Main Vulnerability Database Vulnerabilities #VU34950

Input validation error in TwinCAT - CVE-2019-16871

Published: December 19, 2019 / Updated: August 8, 2020


Vulnerability identifier: #VU34950
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2019-16871
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Beckhoff
Affected software:
TwinCAT

Detailed vulnerability description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

Beckhoff Embedded Windows PLCs through 3.1.4024.0, and Beckhoff Twincat on Windows Engineering stations, allow an attacker to achieve Remote Code Execution (as SYSTEM) via the Beckhoff ADS protocol.


How to mitigate CVE-2019-16871

Install update from vendor's website.

Sources