CVE-2021-45462 : Vulnerability Insights and Analysis
Learn about CVE-2021-45462, a high-severity vulnerability in Open5GS 2.4.0 allowing a crafted packet from UE to crash SGW-U/UPF. Find mitigation steps and long-term security practices.
A crafted packet from UE can crash SGW-U/UPF in Open5GS 2.4.0.
Understanding CVE-2021-45462
What is CVE-2021-45462?
In Open5GS 2.4.0, a vulnerability exists where a malicious packet from UE can lead to the crash of SGW-U/UPF, impacting the availability of the system.
The Impact of CVE-2021-45462
This vulnerability has a CVSS base score of 7.5, classifying it as a high-severity issue due to the potential high impact on system availability.
Technical Details of CVE-2021-45462
Vulnerability Description
The vulnerability allows an attacker to send a specially crafted packet to trigger a crash on the SGW-U/UPF nodes in Open5GS.
Affected Systems and Versions
- Vendor: n/a
- Product: n/a
- Versions: All versions of Open5GS 2.4.0
Exploitation Mechanism
The vulnerability can be exploited by sending a malicious packet from a User Equipment (UE) to the SGW-U/UPF.
Mitigation and Prevention
Immediate Steps to Take
- Apply the vendor-supplied patches as soon as they are available.
- Monitor network traffic for any signs of exploitation attempts.
Long-Term Security Practices
- Regularly update and patch the Open5GS installation.
- Implement network segmentation to restrict access to critical components.
Patching and Updates
Ensure that Open5GS is kept up to date with the latest security patches and fixes.