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The vulnerability CVE-2025-60633 exploits a flaw in the Nudm_SubscriberDataManagement API within Free5GC versions 4.0.0 and 4.0.1. This API handles subscriber data management in the 5G core network. Attackers can send crafted malicious requests to this API endpoint, causing the service to enter a denial of service state. The issue likely stems from improper input validation or resource management during request processing. Specifically, when the API receives certain malformed or high-volume requests, it may trigger excessive resource consumption, such as CPU, memory, or thread exhaustion. This can lead to the Free5GC component becoming unresponsive, crashing, or failing to serve legitimate requests. The vulnerability is remotely exploitable if the API is accessible over the network, allowing attackers to disrupt 5G network functions. The Nudm_SubscriberDataManagement API is critical for managing user data, and its compromise can affect multiple subscribers. The flaw might involve buffer overflows, infinite loops, or memory leaks triggered by specific payloads. Attackers could use automated tools to send a flood of requests, overwhelming the system. This vulnerability highlights security weaknesses in 5G core network implementations, where availability is paramount. Mitigation requires patching the software to validate inputs and manage resources properly. The impact is significant due to the essential role of Free5GC in 5G networks, potentially causing widespread service interruption.
Platform: Free5GC
Version: v4.0.0 and v4.0.1
Vulnerability: Denial of Service
Severity: Not specified
Date: 11/24/2025
Prediction: Patch expected 12/2025
What Undercode Say:
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curl -X POST http://<free5gc-ip>:80/nudm-sdm/v1/subscriber-data -H "Content-Type: application/json" -d '{"malicious":"payload"}'
docker ps | grep free5gc
kubectl get pods -n free5gc
git clone https://github.com/free5gc/free5gc.git
cd free5gc && git tag
grep -r "Nudm_SubscriberDataManagement" src/
How Exploit:
Attackers send crafted HTTP requests to the Nudm_SubscriberDataManagement API endpoint with malicious payloads causing resource exhaustion. Automated tools like scripts can flood the API, leading to DoS.
Protection from this CVE:
Update Free5GC to patched versions. Implement rate limiting, input validation, and network segmentation. Monitor API traffic for anomalies.
Impact:
Service disruption, 5G network downtime, affected subscriber data management, potential financial losses.
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Sources:
Reported By: nvd.nist.gov
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