CVE-2020-27267 : Vulnerability Insights and Analysis

KEPServerEX v6.0 to v6.9, ThingWorx Kepware Server v6.8 and v6.9, ThingWorx Industrial Connectivity (all versions), OPC-Aggregator (all versions), Rockwell Automation KEPServer Enterprise, GE Digital Industrial Gateway Server v7.68.804 and v7.66, and Software Toolbox TOP Server all 6.x versions, are vulnerable to a heap-based buffer overflow. Opening a specifically crafted OPC UA message could allow an attacker to crash the server and potentially leak data.

Understanding CVE-2020-27267

This CVE involves multiple products being susceptible to a heap-based buffer overflow, potentially leading to server crashes and data leakage.

What is CVE-2020-27267?

CVE-2020-27267 is a vulnerability that affects various industrial connectivity products, allowing attackers to exploit a heap-based buffer overflow by sending a malicious OPC UA message.

The Impact of CVE-2020-27267

The vulnerability could result in server crashes and potential data exposure, posing a risk to the integrity and availability of industrial systems utilizing the affected products.

Technical Details of CVE-2020-27267

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The vulnerability is a heap-based buffer overflow that can be triggered by opening a specially crafted OPC UA message.

Affected Systems and Versions

PTC Kepware KEPServerEX: v6.0 to v6.9
ThingWorx Kepware Server: v6.8 and v6.9
ThingWorx Industrial Connectivity: All versions
OPC-Aggregator: All versions
Rockwell Automation KEPServer Enterprise: All versions
GE Digital Industrial Gateway Server: v7.68.804, v7.66
Software Toolbox TOP Server: All 6.x versions

Exploitation Mechanism

By sending a specifically crafted OPC UA message, an attacker can trigger a heap-based buffer overflow, potentially leading to server crashes and data exposure.

Mitigation and Prevention

To address CVE-2020-27267, follow these mitigation strategies:

Immediate Steps to Take

Apply vendor-supplied patches or updates promptly.
Monitor network traffic for any suspicious activity.
Implement strong network segmentation to limit the impact of potential attacks.

Long-Term Security Practices

Regularly update and patch all software and firmware.
Conduct security assessments and penetration testing to identify vulnerabilities.
Educate staff on cybersecurity best practices and awareness.

Patching and Updates

Stay informed about security advisories and updates from the product vendors.
Apply patches and updates as soon as they are available to mitigate the risk of exploitation.