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CVE-2018-5399

9.4 · CRITICAL

The Auto-Maskin DCU 210E firmware contains an undocumented Dropbear SSH server, v2015.55, configured to listen on Port 22 while the DCU is running.

Published Oct 8, 2018CWE-798EPSS 2.10%

Overview

CVE-2018-5399 is a critical-severity vulnerability. It was published on October 8, 2018 and has a CVSS 3.0 base score of 9.4 (CRITICAL).

This vulnerability has a CVSS 3.0 base score of 9.4, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The Auto-Maskin DCU 210E firmware contains an undocumented Dropbear SSH server, v2015.55, configured to listen on Port 22 while the DCU is running. The Dropbear server is configured with a hard-coded user name and password combination of root / amroot. The server is configured to use password only authentication not cryptographic keys, however the firmware image contains an RSA host-key for the server. An attacker can exploit this vulnerability to gain root access to the Angstrom Linux operating system and modify any binaries or configuration files in the firmware. 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-2018-5399?

CVE-2018-5399 is a critical-severity vulnerability. It was published on October 8, 2018 and has a CVSS 3.0 base score of 9.4 (CRITICAL).

How severe is CVE-2018-5399?

This vulnerability has a CVSS 3.0 base score of 9.4, 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-2018-5399?

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-2018-5399?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-5399 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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