CVE-2018-18727 : Vulnerability Insights and Analysis

The Tenda AC7, AC9, AC10, AC15, and AC18 devices have a buffer overflow vulnerability in the httpd web server, allowing potential exploits.

Understanding CVE-2018-18727

What is CVE-2018-18727?

A buffer overflow vulnerability exists in Tenda routers' web server when processing the 'deviceList' parameter, potentially leading to exploitation.

The Impact of CVE-2018-18727

The vulnerability allows attackers to override the return address of the function, posing a significant security risk to the affected devices.

Technical Details of CVE-2018-18727

Vulnerability Description

The vulnerability arises from the direct use of the 'deviceList' parameter in a strcpy function, enabling attackers to manipulate the return address.

Affected Systems and Versions

Tenda AC7 V15.03.06.44_CN
Tenda AC9 V15.03.05.19(6318)_CN
Tenda AC10 V15.03.06.23_CN
Tenda AC15 V15.03.05.19_CN
Tenda AC18 V15.03.05.19(6318)_CN

Exploitation Mechanism

The vulnerability occurs during the processing of the 'deviceList' parameter for a post request, allowing attackers to execute malicious code.

Mitigation and Prevention

Immediate Steps to Take

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

Long-Term Security Practices

Implement strong and unique passwords for router access
Enable firewall settings on the router

Patching and Updates

Apply firmware updates provided by Tenda to address the buffer overflow vulnerability.