CVE-2021-38523 : Security Advisory and Response

NETGEAR R6400 devices before 1.0.1.70 are affected by a stack-based buffer overflow vulnerability that can be exploited by an authenticated user.

Understanding CVE-2021-38523

This CVE pertains to a vulnerability found in NETGEAR R6400 devices that could allow an authenticated user to trigger a stack-based buffer overflow.

What is CVE-2021-38523?

The CVE-2021-38523 vulnerability affects NETGEAR R6400 devices running versions prior to 1.0.1.70. It enables an authenticated user to exploit a stack-based buffer overflow.

The Impact of CVE-2021-38523

With a CVSS base score of 6.9, this medium-severity vulnerability has a high impact on availability but no impact on confidentiality. An attacker with high privileges can change the scope without user interaction.

Technical Details of CVE-2021-38523

This section delves into the technical aspects of the CVE.

Vulnerability Description

The vulnerability is a stack-based buffer overflow, allowing an authenticated user to execute arbitrary code on the affected device.

Affected Systems and Versions

NETGEAR R6400 devices running firmware versions before 1.0.1.70 are impacted by this vulnerability.

Exploitation Mechanism

An authenticated attacker can exploit this vulnerability through a specially crafted request, triggering the buffer overflow.

Mitigation and Prevention

To address CVE-2021-38523, certain steps need to be taken to enhance security.

Immediate Steps to Take

Users should update their NETGEAR R6400 devices to version 1.0.1.70 or later to mitigate the risk of exploitation.

Long-Term Security Practices

Implementing network segmentation, strong authentication mechanisms, and regular security updates can help prevent similar vulnerabilities.

Patching and Updates

Regularly check for firmware updates from NETGEAR and apply them promptly to ensure protection against known security risks.