Anomalous Authentication Behavior in H2-DM1E PLCs
CVE-2024-45368

8.8HIGH

Key Information:

Vendor
Automationdirect
Status
Directlogic H2-dm1e
Vendor
CVE Published:
13 September 2024

Summary

The H2-DM1E PLC by ABC Technologies features an authentication protocol that includes a unique encoding scheme or a challenge-response mechanism. However, it contains a significant flaw where multiple distinct packets are accepted as valid authentication responses. This deviation from conventional security protocols, which typically require a specific response for successful authentication, opens potential avenues for unauthorized access, compromising the integrity and functionality of systems utilizing this PLC.

Affected Version(s)

DirectLogic H2-DM1E 0 <= 2.8.0

References

https://www.cisa.gov/news-events/ics-advisories/icsa-24-2...

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Daniel Davenport, Nicholas Meier, Matthew Zelinsky, and Ryan Silva of John Hopkins Applied Physics Lab reported these vulnerabilities to CISA.
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