CVE-2018-18706 Explained : Impact and Mitigation

A buffer overflow vulnerability has been identified in Tenda AC7, AC9, AC10, AC15, and AC18 devices, potentially allowing attackers to manipulate the router's web server.

Understanding CVE-2018-18706

This CVE involves a buffer overflow in the httpd web server of Tenda routers, affecting specific device versions.

What is CVE-2018-18706?

The vulnerability occurs when the "page" parameter of the "fromDhcpListClient" function is processed, leading to a buffer overflow that can alter the function's return address.

The Impact of CVE-2018-18706

Attackers could exploit this flaw to execute arbitrary code or crash the router's web server.
Unauthorized access to sensitive information or complete system compromise may occur.

Technical Details of CVE-2018-18706

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The issue stems from a buffer overflow in the router's httpd web server, triggered by processing the "page" parameter in a specific function.

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 is exploited by manipulating the "page" parameter to trigger a buffer overflow, potentially leading to unauthorized code execution.

Mitigation and Prevention

Protecting systems from CVE-2018-18706 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches provided by Tenda to address the vulnerability.
Monitor network traffic for any suspicious activities that could indicate exploitation.

Long-Term Security Practices

Regularly update router firmware to ensure the latest security fixes are in place.
Implement network segmentation to limit the impact of potential attacks.

Patching and Updates

Tenda may release firmware updates to patch the vulnerability; ensure timely installation to mitigate risks.