CVE-2021-44109 : Exploit Details and Defense Strategies

A buffer overflow in lib/sbi/message.c in Open5GS 2.3.6 and earlier allows remote attackers to Denial of Service via a crafted sbi request.

Understanding CVE-2021-44109

A buffer overflow vulnerability in Open5GS that can lead to Denial of Service attacks.

What is CVE-2021-44109?

CVE-2021-44109 is a vulnerability in the Open5GS software that enables remote attackers to cause Denial of Service by sending a specially crafted sbi request.

The Impact of CVE-2021-44109

The vulnerability allows remote attackers to disrupt the normal operation of Open5GS, potentially leading to service unavailability.

Technical Details of CVE-2021-44109

Details of the technical aspects of the vulnerability.

Vulnerability Description

A buffer overflow issue in the lib/sbi/message.c component of Open5GS 2.3.6 and earlier versions allows attackers to trigger a DoS condition.

Affected Systems and Versions

Version affected: Open5GS 2.3.6 and below

Exploitation Mechanism

The vulnerability can be exploited by sending malicious sbi requests to the target system, causing a buffer overflow and resulting in a Denial of Service.

Mitigation and Prevention

Measures to address and prevent the exploitation of the vulnerability.

Immediate Steps to Take

Apply patches or updates provided by Open5GS promptly.
Implement network-level controls to filter out malicious sbi requests.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Conduct regular security assessments and penetration testing to identify vulnerabilities.
Stay informed about security advisories related to Open5GS.
Train network administrators on recognizing and responding to potential DoS attacks.

Patching and Updates

Ensure that Open5GS is kept up to date with the latest security patches released by the vendor.