CVE-2022-43626 Explained : Impact and Mitigation

This CVE-2022-43626 article provides details about a vulnerability in D-Link DIR-1935 1.03 routers that allows network-adjacent attackers to execute arbitrary code by bypassing the authentication mechanism.

Understanding CVE-2022-43626

This section will cover what CVE-2022-43626 entails and its impact, technical details, and mitigation steps.

What is CVE-2022-43626?

CVE-2022-43626 is a vulnerability in D-Link DIR-1935 1.03 routers that enables attackers to execute arbitrary code by exploiting a flaw in the handling of SetIPv4FirewallSettings requests.

The Impact of CVE-2022-43626

The vulnerability allows network-adjacent attackers to execute code in the context of root on affected D-Link DIR-1935 1.03 routers, posing a high risk to confidentiality, integrity, and availability.

Technical Details of CVE-2022-43626

This section provides in-depth technical insights into the vulnerability, the affected systems, and the exploitation mechanism.

Vulnerability Description

The flaw exists in the handling of SetIPv4FirewallSettings requests to the web management portal, where user-supplied strings are not properly validated before being used to execute a system call, leading to arbitrary code execution.

Affected Systems and Versions

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

Exploitation Mechanism

Attackers exploit the vulnerability by leveraging the mishandling of subelements within the IPv4FirewallRule element to execute code as root.

Mitigation and Prevention

This section outlines immediate steps to take and long-term security practices to safeguard systems against CVE-2022-43626.

Immediate Steps to Take

Users are advised to update their D-Link DIR-1935 1.03 routers with security patches and restrict network access to minimize the risk of exploitation.

Long-Term Security Practices

Implement network segmentation, regularly update firmware, conduct security audits, and monitor network traffic to enhance overall security posture.

Patching and Updates

Stay informed about security advisories and promptly apply patches released by D-Link to address the vulnerability.