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CVE-2018-5400

9.1 · CRITICAL

The Auto-Maskin products utilize an undocumented custom protocol to set up Modbus communications with other devices without validating those devices.

Published Oct 8, 2018CWE-346EPSS 0.74%

Overview

CVE-2018-5400 is a critical-severity vulnerability. It was published on October 8, 2018 and has a CVSS 3.0 base score of 9.1 (CRITICAL).

This vulnerability has a CVSS 3.0 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The Auto-Maskin products utilize an undocumented custom protocol to set up Modbus communications with other devices without validating those devices. The originating device sends a message in plaintext, 48:65:6c:6c:6f:20:57:6f:72:6c:64, "Hello World" over UDP ports 44444-44446 to the broadcast address for the LAN. Without verification devices respond to any of these broadcast messages on the LAN with a plaintext reply over UDP containing the device model and firmware version. Following this exchange the devices allow Modbus transmissions between the two devices on the standard Modbus port 502 TCP. Impact: An attacker can exploit this vulnerability to send arbitrary messages to any DCU or RP device through spoofing or replay attacks as long as they have access to the network. Affected releases are Auto-Maskin DCU-210E RP-210E: Versions prior to 3.7 on ARMv7.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.kb.cert.org/vuls/id/176301Refwww.us-cert.gov/ics/advisories/icsa-20-051-04Refwww.kb.cert.org/vuls/id/176301Refwww.us-cert.gov/ics/advisories/icsa-20-051-04

How CyberStrike helps

Frequently asked questions

What is CVE-2018-5400?

CVE-2018-5400 is a critical-severity vulnerability. It was published on October 8, 2018 and has a CVSS 3.0 base score of 9.1 (CRITICAL).

How severe is CVE-2018-5400?

This vulnerability has a CVSS 3.0 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2018-5400?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2018-5400?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-5400 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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