CVE-2020-7534 : Exploit Details and Defense Strategies

A CWE-352: Cross-Site Request Forgery (CSRF) vulnerability exists on the web server used, potentially leading to data leaks or unauthorized actions.

Understanding CVE-2020-7534

What is CVE-2020-7534?

This CVE identifies a CSRF vulnerability in Schneider Electric products, including Modicon M340 CPUs, Quantum CPUs, Premium CPUs, and related communication modules.

The Impact of CVE-2020-7534

The vulnerability could allow attackers to perform unauthorized actions or access sensitive data on the affected web server.

Technical Details of CVE-2020-7534

Vulnerability Description

The CSRF flaw in the web server may result in unauthorized activities while a user is logged in, potentially compromising data security.

Affected Systems and Versions

Modicon M340 CPUs: BMXP34 (All Versions)
Modicon Quantum CPUs with integrated Ethernet: 140CPU65 (All Versions)
Modicon Premium CPUs with integrated Ethernet: TSXP57 (All Versions)
Modicon M340 ethernet modules: BMXNOC0401, BMXNOE01, BMXNOR0200H (All Versions)
Modicon Quantum and Premium factory cast communication modules: 140NOE77111, 140NOC78*00, TSXETY5103, TSXETY4103 (All Versions)

Exploitation Mechanism

The vulnerability can be exploited by attackers to manipulate the web server during a user's active session, potentially leading to data breaches or unauthorized actions.

Mitigation and Prevention

Immediate Steps to Take

Apply security patches provided by Schneider Electric promptly.
Monitor and restrict access to the affected systems.
Implement network segmentation to isolate critical devices.

Long-Term Security Practices

Regularly update and patch all software and firmware.
Conduct security assessments and penetration testing to identify vulnerabilities.

Patching and Updates

It is crucial to stay informed about security updates and apply patches as soon as they are released to mitigate the risk of exploitation.