CVE-2018-20326 Explained : Impact and Mitigation

ChinaMobile PLC Wireless Router GPN2.4P21-C-CN devices with firmware W2001EN-00 are vulnerable to cross-site scripting (XSS) attacks through the cgi-bin/webproc?getpage=html/index.html var:subpage parameter.

Understanding CVE-2018-20326

ChinaMobile PLC Wireless Router GPN2.4P21-C-CN devices are susceptible to XSS attacks due to a specific parameter in the firmware.

What is CVE-2018-20326?

This CVE identifies a cross-site scripting vulnerability in ChinaMobile PLC Wireless Router GPN2.4P21-C-CN devices using firmware W2001EN-00.

The Impact of CVE-2018-20326

The vulnerability allows attackers to execute malicious scripts in the context of a user's browser, potentially leading to unauthorized access or data theft.

Technical Details of CVE-2018-20326

ChinaMobile PLC Wireless Router GPN2.4P21-C-CN devices with firmware W2001EN-00 are at risk due to the following:

Vulnerability Description

The XSS vulnerability arises from improper input validation in the var:subpage parameter of the cgi-bin/webproc?getpage=html/index.html script.

Affected Systems and Versions

Product: ChinaMobile PLC Wireless Router GPN2.4P21-C-CN
Firmware Version: W2001EN-00

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious scripts into the var:subpage parameter, which are then executed in the user's browser.

Mitigation and Prevention

To address CVE-2018-20326, follow these steps:

Immediate Steps to Take

Disable remote access to the router's administration interface.
Regularly monitor network traffic for suspicious activities.
Implement strong input validation mechanisms to prevent XSS attacks.

Long-Term Security Practices

Keep firmware and software up to date to patch known vulnerabilities.
Conduct regular security audits and penetration testing to identify and address potential weaknesses.

Patching and Updates

Check for firmware updates from the vendor to address the XSS vulnerability.