CVE-2020-27263 : Security Advisory and Response

A heap-based buffer overflow vulnerability affecting various industrial automation products.

Understanding CVE-2020-27263

What is CVE-2020-27263?

CVE-2020-27263 is a heap-based buffer overflow vulnerability found in multiple industrial automation products, potentially leading to server crashes and data leakage.

The Impact of CVE-2020-27263

The vulnerability could allow an attacker to crash the server and potentially leak data by exploiting a specially crafted OPC UA message.

Technical Details of CVE-2020-27263

Vulnerability Description

The vulnerability exists in several products, including PTC Kepware KEPServerEX, ThingWorx Kepware Server, and others, making them susceptible to a heap-based buffer overflow.

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

Opening a specifically crafted OPC UA message can trigger the heap-based buffer overflow, leading to server crashes and potential data exposure.

Mitigation and Prevention

Immediate Steps to Take

Apply vendor-supplied patches promptly
Monitor network traffic for signs of exploitation
Implement network segmentation to limit the impact of a successful attack

Long-Term Security Practices

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

Patching and Updates

Ensure all affected systems are updated with the latest patches to mitigate the vulnerability.