Security Experts:

High-Severity Vulnerabilities Found in Several Phoenix Contact Industrial Products

Germany-based industrial solutions provider Phoenix Contact last week informed customers that a total of 10 vulnerabilities have been identified across several of the company’s products.

According to advisories published by Phoenix Contact and Germany’s [email protected], which coordinates cybersecurity issues related to industrial automation, the vulnerabilities were reported to the company by various researchers and companies.

The vendor addressed many of the flaws with firmware updates, but in some cases it only provided recommendations for preventing attacks.

Phoenix Contact’s TC router, FL MGUARD modules, ILC 2050 BI building controllers, and PLCNext products are affected by two vulnerabilities: a high-severity security bypass issue and a medium-severity denial of service (DoS) flaw.

SMARTRTU AXC remote terminal and automation systems, CHARX control modular AC charging controllers, EEM-SB37x energy meters, and PLCNext products are impacted by a high-severity vulnerability that can be exploited to install malicious firmware on a device.

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The vendor revealed that FL SWITCH SMCS series switches are impacted by three security holes that can be exploited for DoS and cross-site scripting (XSS) attacks. The XSS bug can be leveraged to inject malicious code into the web-based management interface of a device.

FL COMSERVER UNI products, which are used to integrate serial interfaces into existing Ethernet networks, are affected by a high-severity DoS vulnerability.

Another advisory describes a vulnerability in AXL F BK and IL BK bus couplers. The flaw is related to the existence of a hardcoded password for FTP access, and it can allow an attacker to read “scrambled monitoring information of the device.”

Phoenix Contact’s ILC1x1 industrial controllers are affected by a high-severity DoS vulnerability that can be triggered using specially crafted IP packets.

“Phoenix Contact Classic Line industrial controllers are developed and designed for the use in closed industrial networks. The communication protocols and device access do not feature authentication measures. Remote attackers can use specially crafted IP packets to cause a denial of service on the PLC's network communication module,” the vendor said in its advisory.

The final advisory published last week describes a remote code execution vulnerability in the Automation Worx software suite. The security hole has been classified as high severity, but exploitation requires accessing and manipulating a configuration file, and getting it parsed on the victim system.

Related: Many Phoenix Contact PLCs Still Vulnerable Months After Researcher Issues Warning

Related: Flaws Expose Phoenix Contact Industrial Switches to Attacks

Related: Several Vulnerabilities Expose Phoenix Contact Industrial 4G Routers to Attacks

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Eduard Kovacs (@EduardKovacs) is a contributing editor at SecurityWeek. He worked as a high school IT teacher for two years before starting a career in journalism as Softpedia’s security news reporter. Eduard holds a bachelor’s degree in industrial informatics and a master’s degree in computer techniques applied in electrical engineering.