CVE-2018-16563: A vulnerability has been identified in Firmware variant IEC 61850 for EN100 Ethernet module (All versions < V4.35), Firmware variant MODBUS TCP for EN...

Description

A vulnerability has been identified in Firmware variant IEC 61850 for EN100 Ethernet module (All versions < V4.35), Firmware variant MODBUS TCP for EN100 Ethernet module (All versions), Firmware variant DNP3 TCP for EN100 Ethernet module (All versions), Firmware variant IEC104 for EN100 Ethernet module (All versions), Firmware variant Profinet IO for EN100 Ethernet module (All versions), SIPROTEC 5 relays with CPU variants CP300 and CP100 and the respective Ethernet communication modules (All versions < V7.82), SIPROTEC 5 relays with CPU variants CP200 and the respective Ethernet communication modules (All versions < V7.58). Specially crafted packets to port 102/tcp could cause a denial-of-service condition in the affected products. A manual restart is required to recover the EN100 module functionality of the affected devices. Successful exploitation requires an attacker with network access to send multiple packets to the affected products or modules. As a precondition the IEC 61850-MMS communication needs to be activated on the affected products or modules. No user interaction or privileges are required to exploit the vulnerability. The vulnerability could allow causing a Denial-of-Service condition of the network functionality of the device, compromising the availability of the system. At the time of advisory publication no public exploitation of this security vulnerability was known.

Metrics

EPSS Probability

1.16%

63.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Siemens	Siprotec 5 With Cpu Variant Cp100	< 7.82
Siemens	Siprotec 5 With Cpu Variant Cp200	< 7.58
Siemens	Siprotec 5 With Cpu Variant Cp300	< 7.82
Siemens	En100 Ethernet Module Firmware	All versions
Siemens	En100 Ethernet Module With Firmware Variant Dnp3 Tcp	All versions
Siemens	En100 Ethernet Module With Firmware Variant Iec 61850	4.35
Siemens	En100 Ethernet Module With Firmware Variant Iec104	All versions
Siemens	En100 Ethernet Module With Firmware Variant Modbus Tcp	All versions
Siemens	En100 Ethernet Module With Firmware Variant Profinet Io	All versions

References

https://cert-portal.siemens.com/productcert/pdf/ssa-104088.pdfVendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-104088.pdfVendor Advisory

Timeline

Published: Mar 21, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-16563?

A vulnerability has been identified in Firmware variant IEC 61850 for EN100 Ethernet module (All versions < V4.35), Firmware variant MODBUS TCP for EN100 Ethernet module (All versions), Firmware variant DNP3 TCP for EN100 Ethernet module (All versions), Firmware variant IEC104 for EN100 Ethernet module (All versions), Firmware variant Profinet IO for EN100 Ethernet module (All versions), SIPROTEC 5 relays with CPU variants CP300 and CP100 and the respective Ethernet communication modules (All versions < V7.82), SIPROTEC 5 relays with CPU variants CP200 and the respective Ethernet communication modules (All versions < V7.58). Specially crafted packets to port 102/tcp could cause a denial-of-service condition in the affected products. A manual restart is required to recover the EN100 module functionality of the affected devices. Successful exploitation requires an attacker with network access to send multiple packets to the affected products or modules. As a precondition the IEC 61850-MMS communication needs to be activated on the affected products or modules. No user interaction or privileges are required to exploit the vulnerability. The vulnerability could allow causing a Denial-of-Service condition of the network functionality of the device, compromising the availability of the system. At the time of advisory publication no public exploitation of this security vulnerability was known.

How severe is CVE-2018-16563?

Severity scoring for CVE-2018-16563 is pending analysis. The EPSS model estimates a 1.16% probability of exploitation in the next 30 days.

How do I fix CVE-2018-16563?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

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