CVE-2021-20166 Explained : Impact and Mitigation

Netgear RAX43 version 1.0.3.96 has been identified as having a buffer overrun vulnerability. This vulnerability exists in the URL parsing functionality of the cgi-bin endpoint within the router, leading to a buffer overrun issue that can redirect control flow within the application.

Understanding CVE-2021-20166

This section provides an in-depth look at the details and impact of CVE-2021-20166.

What is CVE-2021-20166?

CVE-2021-20166 refers to a buffer overrun vulnerability present in Netgear RAX43 version 1.0.3.96, specifically within the URL parsing functionality of the router's cgi-bin endpoint. This vulnerability can be exploited to redirect the control flow of the application.

The Impact of CVE-2021-20166

The buffer overrun vulnerability in Netgear RAX43 version 1.0.3.96 poses a significant risk as it allows malicious actors to manipulate the control flow of the application. This can potentially lead to unauthorized access, data tampering, and other security breaches.

Technical Details of CVE-2021-20166

In this section, we delve into the specifics of the vulnerability affecting Netgear RAX43 version 1.0.3.96.

Vulnerability Description

The buffer overrun vulnerability in CVE-2021-20166 is a result of improper handling of URL parsing within the cgi-bin endpoint of the router. This could enable attackers to execute arbitrary code or disrupt the normal operation of the application.

Affected Systems and Versions

Netgear RAX43 version 1.0.3.96 is the specific version impacted by this vulnerability. Users of this version are advised to take immediate action to mitigate the risk.

Exploitation Mechanism

Malicious actors can exploit this vulnerability by crafting specially designed URLs to trigger the buffer overrun issue in the cgi-bin endpoint. Upon successful exploitation, they can potentially gain control over the application's behavior.

Mitigation and Prevention

To address CVE-2021-20166, it is crucial to implement appropriate security measures and follow best practices for safeguarding systems against such vulnerabilities.

Immediate Steps to Take

Users of Netgear RAX43 version 1.0.3.96 are recommended to update to a patched version provided by the vendor as soon as possible. Additionally, network segmentation and access control could help mitigate the risk of exploitation.

Long-Term Security Practices

In the long term, organizations should prioritize regular security assessments, timely software updates, and employee training on security best practices to enhance overall resilience against potential cyber threats.

Patching and Updates

Netgear or the relevant vendor may release patches or updates to address the buffer overrun vulnerability in Netgear RAX43 version 1.0.3.96. It is essential for users to stay informed about such patch releases and apply them promptly to secure their systems.