CVE-2020-27265 : What You Need to Know

A stack-based buffer overflow vulnerability affecting various industrial connectivity servers and software versions.

Understanding CVE-2020-27265

What is CVE-2020-27265?

CVE-2020-27265 is a vulnerability that exists in multiple industrial connectivity servers, potentially allowing remote code execution by crashing the server through a crafted OPC UA message.

The Impact of CVE-2020-27265

The vulnerability could be exploited by an attacker to crash the server and execute malicious code remotely, posing a significant security risk to affected systems.

Technical Details of CVE-2020-27265

Vulnerability Description

The vulnerability is a stack-based buffer overflow in various versions of industrial connectivity servers, including KEPServerEX, ThingWorx Industrial Connectivity, OPC-Aggregator, Rockwell Automation KEPServer Enterprise, GE Digital Industrial Gateway Server, and Software Toolbox TOP Server.

Affected Systems and Versions

PTC Kepware KEPServerEX: v6.0 to v6.9
ThingWorx Industrial Connectivity: All versions
OPC-Aggregator: All versions
Rockwell Automation KEPServer Enterprise
GE Digital Industrial Gateway Server: v7.68.804, v7.66
Software Toolbox TOP Server: All 6.x versions

Exploitation Mechanism

Opening a specifically crafted OPC UA message could trigger the vulnerability, leading to a server crash and potential remote code execution.

Mitigation and Prevention

Immediate Steps to Take

Apply vendor-supplied patches or updates promptly.
Implement network segmentation to limit exposure.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Regularly update and patch all software and systems.
Conduct security assessments and penetration testing.
Educate users on safe practices and security awareness.

Patching and Updates

It is crucial to apply the latest patches and updates provided by the respective vendors to mitigate the vulnerability effectively.