CVE-2018-19016 Explained : Impact and Mitigation

Rockwell Automation EtherNet/IP Web Server Modules 1756-EWEB and CompactLogix 1768-EWEB are susceptible to a denial-of-service attack due to improper input validation.

Understanding CVE-2018-19016

This CVE involves vulnerabilities in Rockwell Automation EtherNet/IP Web Server Modules 1756-EWEB and CompactLogix 1768-EWEB.

What is CVE-2018-19016?

The affected Rockwell Automation modules are prone to a denial-of-service attack triggered by a manipulated UDP packet sent to the SNMP service.

The Impact of CVE-2018-19016

The vulnerability allows remote attackers to disrupt the affected product until it is restarted, potentially causing service interruptions.

Technical Details of CVE-2018-19016

This section delves into the technical aspects of the CVE.

Vulnerability Description

The vulnerability stems from improper input validation in the affected Rockwell Automation modules, enabling the denial-of-service attack.

Affected Systems and Versions

Rockwell Automation EtherNet/IP Web Server Modules 1756-EWEB (includes 1756-EWEBK) Version 5.001 and earlier
CompactLogix 1768-EWEB Version 2.005 and earlier

Exploitation Mechanism

Remote attackers send a manipulated UDP packet to the SNMP service
The attack persists until the affected product is restarted

Mitigation and Prevention

Protecting systems from CVE-2018-19016 is crucial for maintaining security.

Immediate Steps to Take

Apply vendor-provided patches or updates promptly
Implement network segmentation to limit exposure
Monitor network traffic for suspicious activities

Long-Term Security Practices

Regularly update and patch all software and firmware
Conduct security assessments and penetration testing

Patching and Updates

Rockwell Automation may release patches to address the vulnerability
Stay informed about security advisories and updates from the vendor