CVE-2022-28561 Explained : Impact and Mitigation

A stack overflow vulnerability in the /goform/setMacFilterCfg function in the httpd service of Tenda ax12 22.03.01.21_cn router has been identified as CVE-2022-28561. This CVE allows an attacker to acquire a stable shell using a specifically crafted payload.

Understanding CVE-2022-28561

This section will delve into the details of CVE-2022-28561, shedding light on its impact and technical aspects.

What is CVE-2022-28561?

The CVE-2022-28561 is a stack overflow flaw found in the /goform/setMacFilterCfg function of the Tenda ax12 22.03.01.21_cn router's httpd service. It enables a threat actor to execute arbitrary code by sending a malicious payload.

The Impact of CVE-2022-28561

The vulnerability allows an attacker to gain unauthorized access to the affected system, potentially leading to a complete system compromise. By exploiting this flaw, an adversary can establish a stable shell, posing a severe security risk.

Technical Details of CVE-2022-28561

In this section, the technical aspects of CVE-2022-28561, including the vulnerability description, affected systems, and exploitation mechanism, will be explored.

Vulnerability Description

The flaw resides in the /goform/setMacFilterCfg function of the Tenda ax12 22.03.01.21_cn router's httpd service, leading to a stack overflow condition. This can be abused by a remote attacker to execute arbitrary commands on the target system.

Affected Systems and Versions

The vulnerability affects Tenda ax12 22.03.01.21_cn routers. The specific version noted in the CVE is susceptible to exploitation, highlighting the importance of timely updates and patches.

Exploitation Mechanism

An attacker can leverage the stack overflow vulnerability by crafting a malicious payload and sending it to the target router's /goform/setMacFilterCfg function. This manipulation can result in the execution of arbitrary commands with elevated privileges.

Mitigation and Prevention

This section outlines the steps to mitigate the risks posed by CVE-2022-28561 and prevent potential security breaches.

Immediate Steps to Take

To address CVE-2022-28561, it is crucial to apply security patches released by Tenda promptly. Additionally, network segmentation and access control measures can help limit the attack surface.

Long-Term Security Practices

In the long term, maintaining up-to-date firmware, conducting regular security audits, and implementing strong authentication mechanisms can enhance the overall security posture against similar vulnerabilities.

Patching and Updates

Users are strongly advised to monitor official security advisories from Tenda and apply recommended patches and updates as soon as they are available to mitigate the risk associated with CVE-2022-28561.