CVE-2021-45992 : Vulnerability Insights and Analysis

Tenda routers G1 and G3 v15.11.0.17(9502)_CN were discovered to contain a stack overflow vulnerability in the function formSetQvlanList, allowing attackers to cause a Denial of Service (DoS) due to the qvlanName parameter.

Understanding CVE-2021-45992

This CVE involves a vulnerability in Tenda routers G1 and G3 that can be exploited for a DoS attack.

What is CVE-2021-45992?

The vulnerability in Tenda routers G1 and G3 allows attackers to conduct a DoS attack through a specific parameter.

The Impact of CVE-2021-45992

The vulnerability can lead to a Denial of Service condition on the affected routers.

Technical Details of CVE-2021-45992

The technical aspects of the CVE provide insights into the nature of the vulnerability.

Vulnerability Description

The stack overflow in the formSetQvlanList function of Tenda routers G1 and G3 exposes a critical flaw that enables a DoS attack.

Affected Systems and Versions

Product: Tenda routers G1 and G3
Version: v15.11.0.17(9502)_CN

Exploitation Mechanism

Attackers can exploit the vulnerability by manipulating the qvlanName parameter to trigger the stack overflow.

Mitigation and Prevention

Taking immediate steps and implementing long-term security measures can help in mitigating the impact of CVE-2021-45992.

Immediate Steps to Take

Update the router firmware to the latest version provided by the vendor.
Implement network segmentation to limit the impact of potential DoS attacks.

Long-Term Security Practices

Regularly monitor and audit network traffic for any anomalies.
Conduct security training for users and administrators to enhance awareness.

Patching and Updates

Apply patches and security updates promptly to address known vulnerabilities.