CVE-2023-3596

Rockwell Automation Allen-Bradley ControlLogix Communication Modules vulnerable to Denial of Service

Description

Where this vulnerability exists in the Rockwell Automation 1756-EN4* Ethernet/IP communication products, it could allow a malicious user to cause a denial of service by asserting the target system through maliciously crafted CIP messages.

Remediation

Solution:

  • * Update firmware. Update EN4* ControlLogix communications modules to firmware revision 5.002.  * Properly segment networks. Given a cyber actor would require network connectivity to the communication module to exploit the vulnerability, organizations should ensure ICS/SCADA networks are properly segmented within the process structure as well as from the Internet and other non-essential networks. * Implement detection signatures. Use appended Snort signatures to monitor and detect anomalous Common Industrial Protocol (CIP) packets to Rockwell Automation devices.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.48%
Vendor Advisory custhelp.com
Affected: Rockwell Automation 1756-EN4TR Series A
Affected: Rockwell Automation 1756-EN4TRK Series A
Affected: Rockwell Automation 1756-EN4TRXT Series A
Published at:
Updated at:

References

Link Tags
https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1140010 vendor advisory permissions required

Frequently Asked Questions

What is the severity of CVE-2023-3596?
CVE-2023-3596 has been scored as a high severity vulnerability.
How to fix CVE-2023-3596?
To fix CVE-2023-3596: * Update firmware. Update EN4* ControlLogix communications modules to firmware revision 5.002.  * Properly segment networks. Given a cyber actor would require network connectivity to the communication module to exploit the vulnerability, organizations should ensure ICS/SCADA networks are properly segmented within the process structure as well as from the Internet and other non-essential networks. * Implement detection signatures. Use appended Snort signatures to monitor and detect anomalous Common Industrial Protocol (CIP) packets to Rockwell Automation devices.
Is CVE-2023-3596 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-3596 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-3596?
CVE-2023-3596 affects Rockwell Automation 1756-EN4TR Series A, Rockwell Automation 1756-EN4TRK Series A, Rockwell Automation 1756-EN4TRXT Series A .
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