CVE-2018-17924

Name: CVE-2018-17924
Creator: NVD / NIST
Published: 2018-12-07T14:29:00.663+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.6/10EPSS 4.30%

Last modified Jun 17, 2026

CVE-2018-17924 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. Rockwell Automation MicroLogix 1400 Controllers and 1756 ControlLogix Communications Modules An unauthenticated, remote threat actor could send a CIP connection request to an affected device, and upon successful connection, send a new IP configuration to the affected device even if the controller in the system is set to Hard RUN mode. When the affected device accepts this new IP configuration, a loss of communication occurs between the device and the rest of the system as the system traffic is still attempting to communicate with the device via the overwritten IP address.. EPSS estimates a 4.30% chance of exploitation in the next 30 days.

Description

Rockwell Automation MicroLogix 1400 Controllers and 1756 ControlLogix Communications Modules An unauthenticated, remote threat actor could send a CIP connection request to an affected device, and upon successful connection, send a new IP configuration to the affected device even if the controller in the system is set to Hard RUN mode. When the affected device accepts this new IP configuration, a loss of communication occurs between the device and the rest of the system as the system traffic is still attempting to communicate with the device via the overwritten IP address.

Metrics

CVSS 3.1

8.6/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

EPSS Probability

4.30%

89.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Rockwellautomation	Micrologix 1400 Firmware	All versions
Rockwellautomation	1756-Enbt Firmware	All versions
Rockwellautomation	1756-Eweb Series A Firmware	All versions
Rockwellautomation	1756-Eweb Series B Firmware	All versions
Rockwellautomation	1756-En2f Series A Firmware	All versions
Rockwellautomation	1756-En2f Series B Firmware	All versions
Rockwellautomation	1756-En2f Series C Firmware	<= 10.10
Rockwellautomation	1756-En2t Series A Firmware	All versions
Rockwellautomation	1756-En2t Series B Firmware	All versions
Rockwellautomation	1756-En2t Series C Firmware	All versions
Rockwellautomation	1756-En2t Series D Firmware	<= 10.10
Rockwellautomation	1756-En2tr Series A Firmware	All versions
Rockwellautomation	1756-En2tr Series B Firmware	All versions
Rockwellautomation	1756-En2tr Series C Firmware	<= 10.10
Rockwellautomation	1756-En3tr Series A Firmware	All versions
Rockwellautomation	1756-En3tr Series B Firmware	<= 10.10

References

http://www.securityfocus.com/bid/106132Third Party Advisory, VDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-18-310-02Mitigation, Third Party Advisory, US Government Resource
http://www.securityfocus.com/bid/106132Third Party Advisory, VDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-18-310-02Mitigation, Third Party Advisory, US Government Resource

Timeline

Published: Dec 7, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-17924?

How severe is CVE-2018-17924?

CVE-2018-17924 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 4.30% probability of exploitation in the next 30 days.

How do I fix CVE-2018-17924?

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.

Are you affected by CVE-2018-17924?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST