CVE-2019-20073 : Security Advisory and Response

Netis DL4323 devices are vulnerable to cross-site scripting (XSS) attacks through the form2userconfig.cgi username parameter.

Understanding CVE-2019-20073

This CVE identifies a security flaw in Netis DL4323 devices that can be exploited for XSS attacks.

What is CVE-2019-20073?

The vulnerability lies in the username parameter of the form2userconfig.cgi (User Account Configuration) on Netis DL4323 devices, enabling attackers to execute XSS attacks.

The Impact of CVE-2019-20073

Attackers can inject malicious scripts into web pages viewed by users, leading to unauthorized access, data theft, and potential compromise of sensitive information.

Technical Details of CVE-2019-20073

Netis DL4323 devices are susceptible to XSS attacks due to a flaw in the form2userconfig.cgi username parameter.

Vulnerability Description

The vulnerability allows malicious actors to insert and execute scripts in the context of an unsuspecting user's web browser.

Affected Systems and Versions

Product: Netis DL4323
Vendor: Netis
Version: All versions are affected

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious scripts into the username parameter of the form2userconfig.cgi, which gets executed when the page is loaded by a user.

Mitigation and Prevention

To address CVE-2019-20073, users and administrators should take immediate and long-term security measures.

Immediate Steps to Take

Disable the affected parameter or input validation to prevent script injection.
Regularly monitor and review user inputs for suspicious characters or scripts.

Long-Term Security Practices

Implement web application firewalls to filter and block malicious traffic.
Educate users on safe browsing practices to minimize the risk of XSS attacks.

Patching and Updates

Apply patches and updates provided by Netis to fix the vulnerability and enhance the security of DL4323 devices.