CVE-2021-44108 : Security Advisory and Response
Learn about CVE-2021-44108, a vulnerability in Open5GS allowing remote attackers to cause Denial of Service. Find details, impact, and mitigation steps here.
A null pointer dereference in src/amf/namf-handler.c in Open5GS 2.3.6 and earlier allows remote attackers to Denial of Service via a crafted sbi request to amf.
Understanding CVE-2021-44108
This CVE involves a null pointer dereference issue in Open5GS, potentially leading to a Denial of Service attack.
What is CVE-2021-44108?
The CVE-2021-44108 vulnerability in Open5GS 2.3.6 and earlier versions enables remote attackers to trigger a Denial of Service scenario by sending a specially crafted sbi request to amf.
The Impact of CVE-2021-44108
The impact of this vulnerability is the potential for remote attackers to exploit the null pointer dereference issue, resulting in a Denial of Service condition in the Open5GS software.
Technical Details of CVE-2021-44108
This section provides more detailed technical insights into the CVE.
Vulnerability Description
A null pointer dereference vulnerability in src/amf/namf-handler.c in Open5GS 2.3.6 and earlier versions.
Affected Systems and Versions
- Product: Open5GS
- Vendor: Open5GS
- Versions affected: 2.3.6 and earlier
Exploitation Mechanism
The vulnerability can be exploited remotely by sending a specifically crafted sbi request to amf, triggering the null pointer dereference issue.
Mitigation and Prevention
Steps to mitigate the impact of CVE-2021-44108.
Immediate Steps to Take
- Users are advised to update Open5GS to a patched version.
- Monitor network traffic for any suspicious activity.
- Apply appropriate firewall rules to block malicious requests.
Long-Term Security Practices
- Conduct regular security assessments and audits.
- Implement network intrusion detection/prevention systems.
Patching and Updates
- Ensure timely installation of security patches provided by Open5GS.