CVE-2020-7535 : What You Need to Know

A CWE-22 vulnerability exists in the Web Server on Modicon M340, Modicon Quantum, and Modicon Premium, potentially leading to information disclosure.

Understanding CVE-2020-7535

This CVE involves a Path Traversal vulnerability in the mentioned Schneider Electric products.

What is CVE-2020-7535?

The vulnerability allows an attacker to disclose information by sending a specially crafted request to the controller over HTTP.

The Impact of CVE-2020-7535

The vulnerability could result in unauthorized access to sensitive information stored on the affected devices.

Technical Details of CVE-2020-7535

This section provides more technical insights into the CVE.

Vulnerability Description

The CWE-22 vulnerability arises from improper limitation of a pathname to a restricted directory, enabling path traversal attacks.

Affected Systems and Versions

Web Server on Modicon M340
Legacy Offers Modicon Quantum and Modicon Premium
Associated Communication Modules (refer to security notification for affected versions)

Exploitation Mechanism

Attackers can exploit this vulnerability by sending a specifically crafted request to the controller over HTTP.

Mitigation and Prevention

Protecting systems from CVE-2020-7535 is crucial for maintaining security.

Immediate Steps to Take

Apply security patches provided by Schneider Electric promptly.
Implement network segmentation to restrict access to vulnerable devices.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update and patch all software and firmware on the affected devices.
Conduct security assessments and penetration testing to identify and address vulnerabilities.

Patching and Updates

Ensure that all affected systems are updated with the latest patches and security fixes to mitigate the CVE-2020-7535 vulnerability.