CVE-2018-14821 Explained : Impact and Mitigation

Rockwell Automation RSLinx Classic versions prior to 4.00.01 contain a security vulnerability that could allow an unauthorized attacker to disrupt the application by sending a malformed CIP packet to Port 44818.

Understanding CVE-2018-14821

This CVE entry details a vulnerability in Rockwell Automation RSLinx Classic software that could lead to application termination.

What is CVE-2018-14821?

The vulnerability in RSLinx Classic versions before 4.00.01 allows a remote attacker to send a specially crafted packet, potentially causing the application to crash.

The Impact of CVE-2018-14821

Exploitation of this vulnerability could result in a denial of service, requiring manual intervention to restart the software for normal operation.

Technical Details of CVE-2018-14821

Rockwell Automation RSLinx Classic vulnerability specifics and affected systems.

Vulnerability Description

The flaw involves a heap-based buffer overflow, enabling an attacker to disrupt the application by sending a malformed CIP packet to Port 44818.

Affected Systems and Versions

Product: RSLinx Classic
Vendor: Rockwell Automation
Versions Affected: 4.00.01 and prior

Exploitation Mechanism

Attacker sends a specially crafted packet to Port 44818
Application termination may occur

Mitigation and Prevention

Steps to address and prevent exploitation of CVE-2018-14821.

Immediate Steps to Take

Update RSLinx Classic to version 4.00.01 or later
Implement network security measures to restrict access to Port 44818

Long-Term Security Practices

Regularly monitor for security advisories and updates from Rockwell Automation
Conduct security assessments to identify and mitigate vulnerabilities

Patching and Updates

Apply patches and updates provided by Rockwell Automation to address the vulnerability