CVE-2023-40898 : Security Advisory and Response

A detailed overview of the CVE-2023-40898 vulnerability discovered in Tenda AC8 v4 US_AC8V4.0si_V16.03.34.06_cn router firmware.

Understanding CVE-2023-40898

This section provides insights into the critical vulnerability present in the Tenda AC8 v4 router firmware.

What is CVE-2023-40898?

The CVE-2023-40898 vulnerability was found in the Tenda AC8 v4 US_AC8V4.0si_V16.03.34.06_cn router firmware, allowing an attacker to trigger a stack overflow using the 'timeZone' parameter in the /goform/SetSysTimeCfg endpoint.

The Impact of CVE-2023-40898

This vulnerability poses a significant risk as it could lead to remote code execution and potentially allow an attacker to take control of the affected router.

Technical Details of CVE-2023-40898

In this section, we delve into the technical aspects of the CVE-2023-40898 vulnerability.

Vulnerability Description

The stack overflow vulnerability arises from improper input validation of the 'timeZone' parameter in the /goform/SetSysTimeCfg endpoint, enabling an attacker to execute malicious code.

Affected Systems and Versions

The Tenda AC8 v4 US_AC8V4.0si_V16.03.34.06_cn router firmware is confirmed to be impacted by CVE-2023-40898.

Exploitation Mechanism

An attacker can exploit this vulnerability by sending a crafted request containing a specially designed payload for the 'timeZone' parameter, leading to the execution of arbitrary code.

Mitigation and Prevention

This section outlines steps to mitigate the risks associated with CVE-2023-40898.

Immediate Steps to Take

Ensure that the Tenda AC8 v4 router firmware is updated to a non-vulnerable version provided by the vendor. Implementing proper network security measures and restricting unauthorized access can also help mitigate the risk.

Long-Term Security Practices

Regularly update firmware, apply security patches promptly, and conduct security audits to proactively detect and address vulnerabilities in network devices.

Patching and Updates

Stay informed about security advisories from the manufacturer and promptly apply recommended patches to secure the Tenda AC8 v4 router against CVE-2023-40898.