CVE-2023-39239 : Exploit Details and Defense Strategies

A format string vulnerability has been identified in ASUS RT-AX56U V2's General function API, leading to remote code execution without privilege. Learn about the impact, technical details, and mitigation steps for CVE-2023-39239.

Understanding CVE-2023-39239

This section provides an overview of the CVE-2023-39239 vulnerability affecting ASUS RT-AX56U V2.

What is CVE-2023-39239?

CVE-2023-39239 is a format string vulnerability in ASUS RT-AX56U V2's General function API, allowing unauthenticated remote attackers to execute arbitrary code or disrupt services.

The Impact of CVE-2023-39239

The impact of CVE-2023-39239 includes high confidentiality, integrity, and availability impact, with a CVSS v3.1 base score of 9.8 (Critical).

Technical Details of CVE-2023-39239

Explore the specific technical details related to CVE-2023-39239.

Vulnerability Description

The vulnerability is due to lacking validation for a specific value within the apply.cgi module of ASUS RT-AX56U V2, enabling remote arbitrary code execution.

Affected Systems and Versions

ASUS RT-AX55, RT-AX56U_V2, and RT-AC86U are affected by the format string vulnerability, with specific versions being susceptible.

Exploitation Mechanism

Remote attackers can exploit this vulnerability without the need for privileges, potentially executing arbitrary system operations.

Mitigation and Prevention

Discover the steps to mitigate and prevent the exploitation of CVE-2023-39239.

Immediate Steps to Take

Immediate actions include updating affected devices to secure versions provided by ASUS.

Long-Term Security Practices

Implement robust security practices such as regular security assessments and updates to prevent future vulnerabilities.

Patching and Updates

ASUS recommends updating RT-AX55 to version 3.0.0.4.386_51948, RT-AX56U_V2 to version 3.0.0.4.386_51948, and RT-AC86U to version 3.0.0.4.386_51915 to address the CVE-2023-39239 vulnerability.