CVE-2021-38538 : Security Advisory and Response

A stored XSS vulnerability has been identified in certain NETGEAR devices, impacting various models before specific firmware versions. This article provides insights into the vulnerability, its impact, technical details, and mitigation methods.

Understanding CVE-2021-38538

This section delves into the details of the CVE-2021-38538 vulnerability, outlining its implications and potential risks.

What is CVE-2021-38538?

CVE-2021-38538 pertains to a stored XSS vulnerability found in select NETGEAR devices. This vulnerability allows attackers to execute malicious scripts in the context of a user's browser, potentially leading to unauthorized access or data theft.

The Impact of CVE-2021-38538

The impact of this vulnerability is rated as 'MEDIUM' in severity. With a CVSS base score of 6.3, it poses a significant risk to confidentiality and integrity, particularly on local networks. Attackers can exploit this flaw without requiring any special privileges, making it a concerning issue for affected users.

Technical Details of CVE-2021-38538

This section provides a deeper understanding of the technical aspects related to CVE-2021-38538, including how the vulnerability works and which systems are affected.

Vulnerability Description

The vulnerability allows for stored cross-site scripting (XSS) attacks on specific NETGEAR devices. Devices such as D7800, R7800, R8900, R9000, and others are impacted before certain firmware versions, exposing them to potential exploitation.

Affected Systems and Versions

NETGEAR devices affected by this vulnerability include D7800 before 1.0.1.56, R7800 before 1.0.2.68, R8900 before 1.0.4.26, R9000 before 1.0.4.26, and several other models. Users of these devices are urged to update to secure versions promptly.

Exploitation Mechanism

The vulnerability's high attack complexity and user interaction requirements make it challenging to exploit remotely. However, local attackers can leverage this flaw to compromise the confidentiality and integrity of impacted systems, emphasizing the need for immediate action.

Mitigation and Prevention

This section offers guidance on how to mitigate the risks associated with CVE-2021-38538, ensuring users can safeguard their systems effectively.

Immediate Steps to Take

To address this vulnerability, users should update their affected NETGEAR devices to the latest firmware versions provided by the manufacturer. Additionally, enabling robust security configurations and monitoring for suspicious activities can help prevent potential exploits.

Long-Term Security Practices

To enhance overall security posture, users are advised to follow best practices like regularly updating firmware, implementing network security measures, and educating users about phishing and other security threats.

Patching and Updates

NETGEAR has released patches for the affected devices to address the stored XSS vulnerability. Users should regularly check for updates and apply them promptly to ensure their devices are protected against known security vulnerabilities.