CVE-2023-38823 : Security Advisory and Response

A Buffer Overflow vulnerability in Tenda Ac19 v.1.0, AC18, AC9 v.1.0, AC6 v.2.0 and v.1.0 allows a remote attacker to execute arbitrary code via the formSetCfm function in bin/httpd.

Understanding CVE-2023-38823

This section provides insights into the Buffer Overflow vulnerability found in Tenda router models.

What is CVE-2023-38823?

The CVE-2023-38823 is a Buffer Overflow vulnerability discovered in Tenda Ac19 v.1.0, AC18, AC9 v.1.0, AC6 v.2.0, and v.1.0 routers. It enables a remote attacker to execute arbitrary code through the formSetCfm function in bin/httpd.

The Impact of CVE-2023-38823

This vulnerability poses a severe risk as it allows unauthorized remote code execution on the affected Tenda router models, potentially leading to a complete compromise of the device and network.

Technical Details of CVE-2023-38823

Delve into the specifics of the Buffer Overflow vulnerability in the Tenda router models.

Vulnerability Description

The vulnerability arises due to inadequate bounds checking in the formSetCfm function, leading to a buffer overflow condition that can be exploited by a remote attacker.

Affected Systems and Versions

The Buffer Overflow vulnerability impacts Tenda Ac19 v.1.0, AC18, AC9 v.1.0, AC6 v.2.0, and v.1.0 router models, exposing them to potential remote code execution attacks.

Exploitation Mechanism

An attacker can exploit this vulnerability by crafting and sending a malicious request to the formSetCfm function, triggering a buffer overflow and gaining the ability to execute arbitrary code on the affected Tenda routers.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2023-38823 and safeguard Tenda routers from exploitation.

Immediate Steps to Take

Disable remote access to the router's administration panel if not required.
Apply security patches or firmware updates provided by Tenda to address the vulnerability.

Long-Term Security Practices

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

Patching and Updates

Stay informed about security advisories from Tenda and promptly apply recommended patches to protect against known vulnerabilities.