CVE-2022-23973 : Security Advisory and Response

ASUS RT-AX56U's user profile configuration function is vulnerable to a stack-based buffer overflow, allowing an unauthenticated LAN attacker to execute arbitrary code. The vulnerability, with a CVSS score of 8.8 (High), arises from insufficient parameter length validation.

Understanding CVE-2022-23973

This section provides insights into the impact, technical details, and mitigation strategies related to the CVE-2022-23973 vulnerability.

What is CVE-2022-23973?

CVE-2022-23973 pertains to a stack-based buffer overflow in ASUS RT-AX56U's user profile configuration function due to inadequate parameter length validation. This flaw enables unauthenticated LAN attackers to execute malicious code.

The Impact of CVE-2022-23973

The vulnerability poses a high risk, with a CVSS base score of 8.8 (High) and impacts confidentiality, integrity, and availability of affected systems. An attacker can disrupt services or execute arbitrary operations through the exploit.

Technical Details of CVE-2022-23973

This section outlines the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability allows an unauthenticated LAN attacker to trigger a stack-based buffer overflow in the user profile configuration function of ASUS RT-AX56U by providing malicious input. This can lead to arbitrary code execution.

Affected Systems and Versions

ASUS RT-AX56U firmware version 3.0.0.4.386.45898 is affected by CVE-2022-23973. Users with this version are at risk of exploitation.

Exploitation Mechanism

The vulnerability can be exploited by an unauthenticated LAN attacker who sends specially crafted input to the affected device, triggering the stack-based buffer overflow and gaining the ability to run arbitrary code.

Mitigation and Prevention

This section discusses immediate steps to take, long-term security practices, and the importance of patching and updates.

Immediate Steps to Take

Users are advised to update their ASUS RT-AX56U firmware version to 3.0.0.4.386.45934 immediately to mitigate the CVE-2022-23973 vulnerability. Additionally, users should review and restrict network access to the device.

Long-Term Security Practices

To enhance security posture, users should implement network segmentation, regularly monitor for unusual activities within the network, and educate users on safe computing practices.

Patching and Updates

Regularly check for firmware updates from ASUS and apply patches promptly to ensure that the device is fortified against known vulnerabilities.