CVE-2021-45391 Explained : Impact and Mitigation

A Buffer Overflow vulnerability in Tenda Router AX12 V22.03.01.21_CN can lead to Denial of Service.

Understanding CVE-2021-45391

This CVE identifies a specific vulnerability in the Tenda Router AX12 V22.03.01.21_CN.

What is CVE-2021-45391?

It is a Buffer Overflow vulnerability in the goform/setIPv6Status binary file of the Tenda Router AX12 V22.03.01.21_CN via the conType parameter, resulting in a Denial of Service.

The Impact of CVE-2021-45391

The vulnerability allows attackers to trigger a Denial of Service on affected devices, potentially disrupting network services.

Technical Details of CVE-2021-45391

This section covers the technical aspects of the CVE.

Vulnerability Description

The vulnerability is due to a Buffer Overflow issue in the sub_422CE4 function of the goform/setIPv6Status binary file.

Affected Systems and Versions

Product: Tenda Router AX12
Version: V22.03.01.21_CN

Exploitation Mechanism

The vulnerability occurs via the conType parameter in the mentioned binary file, allowing attackers to execute a Denial of Service attack.

Mitigation and Prevention

Protecting systems from CVE-2021-45391 is crucial to maintain security.

Immediate Steps to Take

Update Tenda Router AX12 firmware to the latest version.
Apply security best practices to limit network exposure.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Conduct regular security audits and vulnerability assessments.
Implement network segmentation to contain potential threats.
Educate users on cybersecurity awareness and safe browsing habits.

Patching and Updates

Regularly check for firmware updates and security patches from Tenda to address and mitigate known vulnerabilities.