CVE-2018-7804 : Exploit Details and Defense Strategies

A vulnerability in the embedded web servers of Modicon M340, Premium, Quantum PLCs, and BMXNOR0200 allows users to be redirected to untrusted sites via specially crafted links.

Understanding CVE-2018-7804

What is CVE-2018-7804?

This CVE refers to a URL Redirection to Untrusted Site vulnerability in Schneider Electric SE's embedded web servers.

The Impact of CVE-2018-7804

The vulnerability enables attackers to redirect users to malicious websites by manipulating links on affected devices.

Technical Details of CVE-2018-7804

Vulnerability Description

Users can unknowingly be redirected to URLs chosen by attackers when clicking on specific links due to the flaw in the embedded web servers.

Affected Systems and Versions

Embedded Web Servers in all Modicon M340, Premium, Quantum PLCs, and BMXNOR0200

Exploitation Mechanism

Attackers exploit this vulnerability by crafting links that, when clicked by users on affected devices, redirect them to malicious sites.

Mitigation and Prevention

Immediate Steps to Take

Avoid clicking on untrusted links received via emails or unknown sources
Regularly update firmware and security patches for affected devices

Long-Term Security Practices

Implement network segmentation to isolate critical systems
Conduct regular security audits and penetration testing

Patching and Updates

Apply patches and updates provided by Schneider Electric SE to address the CVE-2018-7804 vulnerability.