CVE-2023-49391 Explained : Impact and Mitigation

An issue was discovered in free5GC version 3.3.0 that allows remote attackers to execute arbitrary code and cause a denial of service (DoS) on the AMF component via a crafted NGAP message.

Understanding CVE-2023-49391

This section will cover the details of CVE-2023-49391.

What is CVE-2023-49391?

CVE-2023-49391 is a vulnerability found in free5GC version 3.3.0, enabling remote attackers to execute arbitrary code and launch a DoS attack on the AMF component through a specifically crafted NGAP message.

The Impact of CVE-2023-49391

The impact of this vulnerability includes the potential for unauthorized remote code execution and causing a denial of service on the AMF component, posing a significant risk to the system's integrity and availability.

Technical Details of CVE-2023-49391

In this section, we will delve deeper into the technical aspects of CVE-2023-49391.

Vulnerability Description

The vulnerability in free5GC version 3.3.0 allows attackers to exploit the AMF component by sending malicious NGAP messages, leading to code execution and service disruption.

Affected Systems and Versions

The affected systems include instances running free5GC version 3.3.0. As of the data published, further details on specific affected versions or products are not available.

Exploitation Mechanism

Remote attackers exploit this vulnerability by sending specially crafted NGAP messages to the AMF component, triggering the execution of arbitrary code and causing a DoS condition.

Mitigation and Prevention

This section provides insights into mitigating and preventing the exploitation of CVE-2023-49391.

Immediate Steps to Take

Update free5GC to a secure version or apply patches provided by the vendor to fix the vulnerability.
Implement network security measures to block unauthorized access and malicious traffic.

Long-Term Security Practices

Regularly monitor for security updates and patches from the vendor to address emerging threats.
Conduct security audits and penetration testing to identify and remediate vulnerabilities proactively.

Patching and Updates

Stay informed about security advisories related to free5GC to promptly apply patches released by the vendor.