CVE-2022-23919 : Exploit Details and Defense Strategies

A stack-based buffer overflow vulnerability was discovered in the confsrv set_mf_rule functionality of TCL LinkHub Mesh Wifi MS1G_00_01.00_14. This vulnerability allows an attacker to execute arbitrary code via a specially-crafted network packet, leading to a buffer overflow. Read on to understand the impact, technical details, and mitigation strategies associated with CVE-2022-23919.

Understanding CVE-2022-23919

A critical vulnerability that affects TCL LinkHub Mesh Wifi MS1G_00_01.00_14, potentially leading to remote code execution.

What is CVE-2022-23919?

The vulnerability arises from a stack-based buffer overflow in the set_mf_rule function of the affected device, allowing an attacker to exploit it by sending a malicious network packet. This results in altering the normal flow of the program and executing arbitrary code.

The Impact of CVE-2022-23919

With a CVSS base score of 8.8, this high-severity vulnerability poses a significant risk to confidentiality, integrity, and availability. An adversary can leverage this flaw to compromise the affected device, potentially leading to unauthorized access, data theft, or service disruption.

Technical Details of CVE-2022-23919

The vulnerability leverages the name field within the protobuf message to trigger a stack-based buffer overflow.

Vulnerability Description

A stack-based buffer overflow exists in the confsrv set_mf_rule functionality of TCL LinkHub Mesh Wifi MS1G_00_01, allowing remote attackers to execute arbitrary code via a crafted network packet.

Affected Systems and Versions

The vulnerability affects TCL LinkHub Mesh Wifi version MS1G_00_01.00_14.

Exploitation Mechanism

An attacker can exploit this vulnerability by sending a specially-crafted network packet to trigger the stack-based buffer overflow.

Mitigation and Prevention

Understanding the immediate steps to take and long-term security practices is crucial to mitigate the risks associated with CVE-2022-23919.

Immediate Steps to Take

Apply security patches provided by TCL promptly.
Implement network security measures to detect and block malicious network traffic.
Monitor network activity for any signs of abnormal behavior.

Long-Term Security Practices

Regularly update firmware and security software to defend against known vulnerabilities.
Conduct security assessments and penetration testing to identify and address potential security weaknesses.
Educate users about cybersecurity best practices to prevent successful exploitation of vulnerabilities.

Patching and Updates

Stay informed about security advisories from TCL and apply patches or updates as soon as they are available to secure your devices against potential exploits.