CVE-2020-13394 : Exploit Details and Defense Strategies

A buffer overflow vulnerability in Tenda routers allows attackers to execute arbitrary code.

Understanding CVE-2020-13394

What is CVE-2020-13394?

This CVE identifies a buffer overflow vulnerability in Tenda AC6, AC9, AC15, and AC18 devices' web server.

The Impact of CVE-2020-13394

The vulnerability enables attackers to execute arbitrary code by overwriting the return address of a function.

Technical Details of CVE-2020-13394

Vulnerability Description

The issue arises in the router's web server while processing a specific parameter for a POST request, leading to a buffer overflow.

Affected Systems and Versions

Tenda AC6 V1.0 V15.03.05.19_multi_TD01
Tenda AC9 V1.0 V15.03.05.19(6318)_CN
Tenda AC9 V3.0 V15.03.06.42_multi
Tenda AC15 V1.0 V15.03.05.19_multi_TD01
Tenda AC18 V15.03.05.19(6318_)_CN

Exploitation Mechanism

Attacker constructs a payload to exploit the buffer overflow vulnerability

Mitigation and Prevention

Immediate Steps to Take

Disable remote access to the router's web interface if not required
Regularly check for firmware updates from Tenda

Long-Term Security Practices

Implement strong network segmentation to limit the impact of potential attacks
Regularly monitor network traffic for any suspicious activities

Patching and Updates

Apply firmware updates provided by Tenda to address the vulnerability