CVE-2023-40891 Explained : Impact and Mitigation

Exploit discovered on Tenda AC8 v4 US_AC8V4.0si_V16.03.34.06_cn due to stack overflow vulnerability.

Understanding CVE-2023-40891

This article provides insight into CVE-2023-40891 and its implications.

What is CVE-2023-40891?

The vulnerability in Tenda AC8 v4 US_AC8V4.0si_V16.03.34.06_cn allows attackers to trigger a stack overflow through the parameter firewallEn.

The Impact of CVE-2023-40891

Exploiting this flaw could lead to remote code execution and compromise the security and integrity of the affected system.

Technical Details of CVE-2023-40891

Explore the technical aspects of CVE-2023-40891.

Vulnerability Description

The issue arises in Tenda AC8 v4 US_AC8V4.0si_V16.03.34.06_cn when processing the firewallEn parameter, resulting in a stack overflow.

Affected Systems and Versions

All versions of Tenda AC8 v4 with firmware version US_AC8V4.0si_V16.03.34.06_cn are impacted by this vulnerability.

Exploitation Mechanism

Attackers can exploit the stack overflow vulnerability by manipulating the firewallEn parameter in /goform/SetFirewallCfg.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2023-40891.

Immediate Steps to Take

Update Tenda AC8 v4 devices to a non-vulnerable firmware version and restrict network access to minimize exposure.

Long-Term Security Practices

Implement network segmentation, regular security audits, and intrusion detection systems to enhance overall cybersecurity posture.

Patching and Updates

Regularly check for firmware updates from Tenda and apply patches promptly to address known security vulnerabilities.