CVE-2023-40837 : Vulnerability Insights and Analysis

A command execution vulnerability has been identified in the 'sub_ADD50' function of Tenda AC6 US_AC6V1.0BR_V15.03.05.16_multi_TD01.bin firmware version. This vulnerability allows an attacker to execute commands by manipulating specific fields within the 'formSetIptv' function.

Understanding CVE-2023-40837

This section will provide insights into the nature and impact of the CVE-2023-40837 vulnerability.

What is CVE-2023-40837?

CVE-2023-40837 is a command execution vulnerability present in the Tenda AC6 firmware version US_AC6V1.0BR_V15.03.05.16_multi_TD01.bin. It enables an attacker to manipulate certain fields to execute unauthorized commands through the 'sub_ADD50' function.

The Impact of CVE-2023-40837

The vulnerability poses a significant risk as it allows malicious actors to execute arbitrary commands on affected devices, potentially leading to unauthorized access, data manipulation, or service disruption.

Technical Details of CVE-2023-40837

This section delves into the specifics of the CVE-2023-40837 vulnerability.

Vulnerability Description

The vulnerability stems from inadequate input validation within the 'formSetIptv' function, enabling attackers to pass malicious commands through the 'list' and 'vlanId' fields, leading to command execution via the 'sub_ADD50' function.

Affected Systems and Versions

The impact of CVE-2023-40837 is observed in the Tenda AC6 firmware version US_AC6V1.0BR_V15.03.05.16_multi_TD01.bin. Systems running this specific firmware version are vulnerable to exploitation.

Exploitation Mechanism

Exploiting CVE-2023-40837 involves crafting malicious inputs for the 'list' and 'vlanId' fields, manipulating the parameters passed to the 'sub_ADD50' function to execute unauthorized commands.

Mitigation and Prevention

In this section, we discuss preventive measures and mitigation strategies for CVE-2023-40837.

Immediate Steps to Take

Update the Tenda AC6 firmware to a patched version that addresses the command execution vulnerability.
Implement network segmentation to isolate vulnerable devices from critical systems.
Monitor network traffic and device logs for any suspicious activities.

Long-Term Security Practices

Conduct regular security assessments and penetration tests to identify and remediate vulnerabilities proactively.
Educate users on best practices for firmware updates and cybersecurity hygiene.

Patching and Updates

Stay informed about security updates released by Tenda for the AC6 router series and promptly apply patches to ensure protection against known vulnerabilities.