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image: Siemens

Flaws Expose Siemens Protection Relays to DoS Attacks

July 13, 2018

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Siemens has informed customers that some of the company’s SIPROTEC protection relays are exposed to denial-of-service (DoS) attacks due to a couple of vulnerabilities present in the EN100 communication module.

SIPROTEC devices provide control, protection, measurement and automation functions for electrical substations. These products use the EN100 ethernet module for IEC 61850, PROFINET IO, Modbus, DNP3 and IEC 104 communications.

Researchers at ScadaX, an independent group of experts focusing on ICS and IoT security, discovered that the EN100 module and SIPROTEC 5 relays are impacted by two DoS vulnerabilities that can be exploited by sending specially crafted packets to the targeted device’s TCP port 102.

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