CVE-2023-27021 Explained : Impact and Mitigation

This CVE-2023-27021 was published on April 7, 2023, by MITRE. It involves a vulnerability found in Tenda AC10 US_AC10V4.0si_V16.03.10.13_cn that can lead to a stack overflow through the formSetFirewallCfg function. This security flaw could enable attackers to execute arbitrary code or cause a Denial of Service (DoS) using a specifically crafted payload.

Understanding CVE-2023-27021

In this section, we will delve deeper into the details of CVE-2023-27021.

What is CVE-2023-27021?

CVE-2023-27021 is a vulnerability identified in Tenda AC10 US_AC10V4.0si_V16.03.10.13_cn, allowing threat actors to exploit a stack overflow in the formSetFirewallCfg function.

The Impact of CVE-2023-27021

The impact of this vulnerability can be severe as it can be leveraged by attackers to either disrupt the service availability through DoS attacks or execute unauthorized code on the affected system.

Technical Details of CVE-2023-27021

Let's explore the technical aspects of CVE-2023-27021.

Vulnerability Description

The vulnerability in Tenda AC10 US_AC10V4.0si_V16.03.10.13_cn results from a stack overflow in the formSetFirewallCfg function, which can be exploited by malicious actors to achieve DoS or execute arbitrary code.

Affected Systems and Versions

As per the provided information, the specific affected vendor, product, and versions are not disclosed. Hence, it is crucial to monitor for updates and advisories from Tenda or relevant authorities.

Exploitation Mechanism

Attackers can leverage this vulnerability by sending a specially crafted payload to trigger the stack overflow in the formSetFirewallCfg function, ultimately leading to unauthorized code execution or service denial.

Mitigation and Prevention

Protecting against CVE-2023-27021 requires proactive security measures and responses to mitigate the risks associated with the vulnerability.

Immediate Steps to Take

Organizations using Tenda AC10 US_AC10V4.0si_V16.03.10.13_cn should consider implementing network-level protections, such as firewall rules, to limit potential exposure.
Regularly monitoring network traffic and system logs for any suspicious activities can help in detecting potential exploitation attempts.

Long-Term Security Practices

It is essential to keep systems up to date with the latest security patches and firmware updates provided by Tenda to address known vulnerabilities.
Conducting regular security assessments and penetration testing can help in identifying and addressing potential security weaknesses proactively.

Patching and Updates

Stay informed about any security advisories or patches released by Tenda regarding CVE-2023-27021. Applying patches promptly can help in closing off avenues for exploitation and enhancing system security.