CVE-2022-35538 : Security Advisory and Response

This article provides detailed information about CVE-2022-35538, a vulnerability found in WAVLINK wireless routers.

Understanding CVE-2022-35538

CVE-2022-35538 is a vulnerability that affects WAVLINK WN572HP3, WN533A8, WN530H4, WN535G3, WN531P3 wireless routers. The vulnerability exists in the wireless.cgi script, allowing for command injection through specific parameters.

What is CVE-2022-35538?

The vulnerability in WAVLINK routers allows an attacker to execute commands through unchecked parameters in the wireless.cgi script, specifically affecting the /wifi_mesh.shtml page.

The Impact of CVE-2022-35538

The lack of parameter filtering on delete_list, delete_al_mac, b_delete_list, and b_delete_al_mac parameters can lead to unauthorized command execution, potentially compromising the security of the router and network.

Technical Details of CVE-2022-35538

Below are the technical details related to this CVE:

Vulnerability Description

The vulnerability arises from the lack of input validation on critical parameters, enabling attackers to inject malicious commands into the router's configuration.

Affected Systems and Versions

Products impacted include WAVLINK WN572HP3, WN533A8, WN530H4, WN535G3, WN531P3 routers running the vulnerable wireless.cgi script.

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting malicious requests to the affected parameters, triggering the execution of unauthorized commands.

Mitigation and Prevention

Protecting against CVE-2022-35538 requires immediate action and long-term security practices.

Immediate Steps to Take

Apply security patches released by WAVLINK to address the vulnerability.
Implement network segmentation to limit the impact of potential attacks.

Long-Term Security Practices

Regularly update firmware and software to mitigate known vulnerabilities.
Conduct security audits and penetration testing to identify and address potential weaknesses.

Patching and Updates

Ensure timely installation of recommended patches and updates to safeguard against emerging threats.