CVE-2021-45988 : Security Advisory and Response

Tenda routers G1 and G3 v15.11.0.17(9502)_CN were found to have a stack overflow vulnerability in the formAddDnsForward function, potentially leading to a Denial of Service (DoS) attack.

Understanding CVE-2021-45988

Tenda routers G1 and G3 v15.11.0.17(9502)_CN contain a vulnerability that enables attackers to disrupt services by triggering a stack overflow through a specific parameter.

What is CVE-2021-45988?

The CVE-2021-45988 vulnerability affects Tenda routers G1 and G3 v15.11.0.17(9502)_CN, allowing malicious actors to exploit a stack overflow in the formAddDnsForward function to initiate a Denial of Service (DoS) attack.

The Impact of CVE-2021-45988

The vulnerability could result in a DoS attack, causing service disruption for users relying on Tenda routers G1 and G3 v15.11.0.17(9502)_CN.

Technical Details of CVE-2021-45988

A deeper dive into the technical aspects of the CVE reveals:

Vulnerability Description

Stack overflow vulnerability in the formAddDnsForward function
Allows attackers to execute a DoS attack

Affected Systems and Versions

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

Exploitation Mechanism

Attackers exploit the DnsForwardRule parameter to trigger the vulnerability

Mitigation and Prevention

Understanding how to mitigate the CVE-2021-45988 vulnerability is crucial.

Immediate Steps to Take

Monitor Tenda for patches or security advisories
Employ network security measures to detect and prevent DoS attacks

Long-Term Security Practices

Regularly update router firmware to the latest versions
Implement network segmentation to contain potential attacks

Patching and Updates

Apply patches provided by Tenda to address the vulnerability