CVE-2022-40946 Explained : Impact and Mitigation

A Denial of Service vulnerability has been discovered on D-Link DIR-819 Firmware Version 1.06 Hardware Version A1 devices, allowing attackers to trigger the vulnerability via a specific parameter in a web request.

Understanding CVE-2022-40946

This section will provide insights into the nature and impact of the CVE-2022-40946 vulnerability.

What is CVE-2022-40946?

CVE-2022-40946 is a Denial of Service vulnerability found on D-Link DIR-819 Firmware Version 1.06 Hardware Version A1 devices. Attackers can exploit this vulnerability by manipulating a particular parameter in a specific web request.

The Impact of CVE-2022-40946

The impact of this vulnerability includes the ability for malicious actors to launch Denial of Service attacks, potentially disrupting the normal operation of affected devices.

Technical Details of CVE-2022-40946

This section will delve into the technical aspects of CVE-2022-40946, including the vulnerability description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability arises from improper input validation on D-Link DIR-819 devices, specifically related to the sys_token parameter in a particular web request.

Affected Systems and Versions

D-Link DIR-819 Firmware Version 1.06 Hardware Version A1 devices are confirmed to be affected by CVE-2022-40946.

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating the sys_token parameter in a cgi-bin/webproc?getpage=html/index.html request, leading to a Denial of Service condition.

Mitigation and Prevention

This section will outline steps to mitigate the risks posed by CVE-2022-40946 and prevent potential exploitation.

Immediate Steps to Take

Users are advised to update their D-Link DIR-819 devices to a secure firmware version and apply vendor-provided patches to address the vulnerability.

Long-Term Security Practices

Implementing network segmentation, access controls, and regular security updates can help enhance the overall security posture against similar vulnerabilities.

Patching and Updates

Regularly check for firmware updates and security advisories from D-Link to promptly apply patches and protect devices from known vulnerabilities.