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How the mentioned CVE works:
The vulnerability CVE-2025-53032 exists within the Npcf_BDTPolicyControl service of Free5GC. A threat actor can exploit this flaw by sending a specially crafted HTTP POST request to the vulnerable API endpoint. This malformed request contains data that the application fails to parse or handle correctly, causing an internal error. The processing thread for this request enters an unhandled exception state, leading to a crash. Repeated exploitation of this issue depletes available system resources or causes critical service processes to terminate. Consequently, the core network function becomes unresponsive, resulting in a Denial of Service condition for legitimate users and network functions that depend on the BDTPolicyControl service.
Platform: Free5GC
Version: 4.0.0, 4.0.1
Vulnerability: Denial of Service
Severity: Moderate
date: 2025-11-24
Prediction: 2025-12-15
What Undercode Say:
curl -X POST -d "malformed_data" http://<TARGET_IP>:<PORT>/npcf-bdtpolicycontrol/v1/bdtpolicies
// Example of a potential crash-inducing payload structure
type CraftedBDTRequest struct {
InvalidField string `json:"bdtRefId"` // Unexpected null pointer
}
How Exploit:
Craft malicious POST request.
Send to BDTPolicyControl API.
Crash service process.
Protection from this CVE:
Apply vendor patch.
Input request validation.
Sanitize API inputs.
Impact:
Service unavailability.
Resource exhaustion.
Disrupted network operations.
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Sources:
Reported By: github.com
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