CVE-2019-16534 : Exploit Details and Defense Strategies

A cross-site scripting (XSS) vulnerability exists on DrayTek Vigor2925 devices with firmware version 3.8.4.3, allowing exploitation via a specially crafted WAN name.

Understanding CVE-2019-16534

This CVE involves a security issue on DrayTek Vigor2925 devices that can be exploited through a specific configuration setting.

What is CVE-2019-16534?

The vulnerability in CVE-2019-16534 is a cross-site scripting (XSS) flaw found on DrayTek Vigor2925 devices running firmware version 3.8.4.3. Attackers can leverage this vulnerability by using a malicious WAN name on the General Setup screen.

The Impact of CVE-2019-16534

This vulnerability poses a risk of unauthorized access and potential data theft on affected devices. As the device is no longer supported, users are at a higher risk of exploitation.

Technical Details of CVE-2019-16534

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The XSS vulnerability on DrayTek Vigor2925 devices allows attackers to inject malicious scripts into web pages viewed by users, potentially leading to account hijacking or sensitive data exposure.

Affected Systems and Versions

DrayTek Vigor2925 devices with firmware version 3.8.4.3

Exploitation Mechanism

Attackers can exploit this vulnerability by inputting a specially crafted WAN name on the General Setup screen, triggering the execution of malicious scripts.

Mitigation and Prevention

Protecting systems from CVE-2019-16534 requires immediate actions and long-term security measures.

Immediate Steps to Take

Disable remote access if not required to reduce the attack surface
Regularly monitor network traffic for any suspicious activities
Implement strong firewall rules to filter out potentially harmful requests

Long-Term Security Practices

Keep systems and firmware up to date to patch known vulnerabilities
Conduct regular security audits and penetration testing to identify and address weaknesses
Educate users on safe browsing practices and the importance of cybersecurity awareness

Patching and Updates

As the DrayTek Vigor2925 device is no longer supported, users are advised to consider upgrading to a newer, supported model with the latest security features and firmware updates.