Denial of service in Rockwell Automation MicroLogix 1400 Controllers and 1756 ControlLogix

Published: 2018-12-07 16:48:59
Severity Medium
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2018-17924
CVSSv3 7.5 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
CWE ID CWE-306
Exploitation vector Network
Public exploit N/A
Vulnerable software 1756-EN3TR Series B
1756-EN3TR Series A
1756-EN2TR Series C
1756-EN2TR Series B
1756-EN2TR Series A
1756-EN2T Series D
1756-EN2T Series C
1756-EN2T Series B
1756-EN2T Series A
1756-EN2F Series C
1756-EN2F Series B
1756-EN2F Series A
1756-EWEB Series B
1756-EWEB Series A
1756-ENBT
MicroLogix 1400 Controller Series C
MicroLogix 1400 Controllers Series B
MicroLogix 1400 Controllers Series A
Vulnerable software versions 1756-EN3TR Series B -
1756-EN3TR Series A -
1756-EN2TR Series C -
1756-EN2TR Series B -
1756-EN2TR Series A -
1756-EN2T Series D -
1756-EN2T Series C -
1756-EN2T Series B -
1756-EN2T Series A -
1756-EN2F Series C -
1756-EN2F Series B -
1756-EN2F Series A -
1756-EWEB Series B -
1756-EWEB Series A -
1756-ENBT -
MicroLogix 1400 Controller Series C -
MicroLogix 1400 Controllers Series B -
MicroLogix 1400 Controllers Series A -
Vendor URL Rockwell Automation

Security Advisory

1) Missing authentication for critical function

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to a loss of communication between the device and the rest of the system when the affected device accepts this new IP configuration as the system traffic is still attempting to communicate with the device via the overwritten IP address.. A remote attacker can 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.

Remediation

Install update from vendor's website.

External links

https://ics-cert.us-cert.gov/advisories/ICSA-18-310-02

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