Talos found tens of dangerous flaws in WAGO Controllers

Pierluigi Paganini March 12, 2020

Cisco Talos experts discovered tens of flaws in WAGO products that expose controllers and human-machine interface (HMI) panels to remote attacks.

Talos and Germany’s VDE CERT this week published advisories describing roughly 30 vulnerabilities identified in devices made by WAGO, a German company specializing in electrical connection and automation solutions.

The vulnerabilities affect PFC100 and PFC200 programmable logic controllers (PLCs) and Touch Panel 600 HMI panels, they can lead to arbitrary code execution, command injection, information disclosure, and could allow DoS attacks. Experts reported that some of the flaws could be only exploited by authenticated attackers.

Talos researchers reported that some vulnerabilities impact the e!COCKPIT engineering software, the Web-Based Management (WBM) application, the cloud connectivity of the controllers, and the I/O Check functionality.

Experts pointed out that attackers can chain some of the vulnerabilities to take complete control of the targeted devices.

WAGO addressed only a few issues with the release of security patches, other flaws are expected to be fixed in the second quarter of 2020. The good news is that the company has provided mitigations for all the vulnerabilities.

In June 2019, a security researcher at consulting company SEC Consult discovered several vulnerabilities in some models of WAGO industrial switches. The vulnerabilities was affecting WAGO industrial switches 852-303, 852-1305 and 852-1505 models. 

In December 2017, researchers at SEC Consult experts discovered that 17 models of WAGO PFC200 PLC were vulnerable to an unauthenticated remote access exploit.

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Pierluigi Paganini

(SecurityAffairs – hacking, WAGO)

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