CVE-2022-43623 : Security Advisory and Response

A critical vulnerability in D-Link DIR-1935 1.03 routers allows network-adjacent attackers to execute arbitrary code by bypassing the authentication mechanism. Exploiting this flaw could lead to the execution of code in the root context.

Understanding CVE-2022-43623

This section will delve into the specifics of the CVE-2022-43623 vulnerability.

What is CVE-2022-43623?

CVE-2022-43623 is a vulnerability in D-Link DIR-1935 1.03 routers that enables attackers to run arbitrary code with root privileges, even though authentication is required.

The Impact of CVE-2022-43623

The vulnerability's impact includes the execution of code in the root context, posing a severe security risk to affected devices.

Technical Details of CVE-2022-43623

Here, we will explore the technical aspects of CVE-2022-43623.

Vulnerability Description

The flaw exists in the handling of SetWebFilterSetting requests, specifically in the WebFilterURLs element, where user-supplied strings are not adequately validated before executing system calls.

Affected Systems and Versions

The vulnerability affects D-Link DIR-1935 version 1.03 routers.

Exploitation Mechanism

Attackers can bypass the authentication mechanism to exploit this vulnerability and execute arbitrary code with root privileges.

Mitigation and Prevention

In this section, we will discuss how to mitigate and prevent the exploitation of CVE-2022-43623.

Immediate Steps to Take

Immediately update the affected D-Link DIR-1935 1.03 routers with the latest security patches provided by the vendor.

Long-Term Security Practices

Implement strong network segmentation, regularly monitor for unauthorized access, and educate users on safe browsing practices.

Patching and Updates

Stay informed about security updates from D-Link and apply them promptly to prevent exploitation of known vulnerabilities.