CVE-2023-40894 : Exploit Details and Defense Strategies

A stack overflow vulnerability was discovered in Tenda AC8 v4 US_AC8V4.0si_V16.03.34.06_cn through the parameter list at /goform/SetStaticRouteCfg.

Understanding CVE-2023-40894

This section will cover the details of the CVE-2023-40894 vulnerability.

What is CVE-2023-40894?

The CVE-2023-40894 vulnerability involves a stack overflow issue found in Tenda AC8 v4 US_AC8V4.0si_V16.03.34.06_cn when processing parameters in the /goform/SetStaticRouteCfg endpoint.

The Impact of CVE-2023-40894

The exploitation of this vulnerability could potentially lead to remote code execution or denial of service, posing a significant risk to the affected system.

Technical Details of CVE-2023-40894

In this section, we will delve into the technical aspects of CVE-2023-40894.

Vulnerability Description

The vulnerability arises due to inadequate input validation, allowing an attacker to manipulate the parameter list and trigger a stack overflow condition.

Affected Systems and Versions

Tenda AC8 v4 US_AC8V4.0si_V16.03.34.06_cn is confirmed to be affected by this vulnerability.

Exploitation Mechanism

An attacker can exploit this vulnerability by sending specially crafted requests to the /goform/SetStaticRouteCfg endpoint, causing a stack overflow and potentially gaining unauthorized access.

Mitigation and Prevention

This section will outline the steps to mitigate and prevent exploitation of CVE-2023-40894.

Immediate Steps to Take

Users are advised to restrict network access to the affected device, apply patches or updates provided by the vendor, and monitor for any unusual network activity.

Long-Term Security Practices

Implementing secure coding practices, regular security assessments, and keeping software up to date can help prevent similar vulnerabilities in the future.

Patching and Updates

Stay informed about security advisories from Tenda and apply patches promptly to address the CVE-2023-40894 vulnerability.