diff --git a/init_code.py b/init_code.py index db14b49..d3552a9 100644 --- a/init_code.py +++ b/init_code.py @@ -27,7 +27,26 @@ def load_model(infile): os.makedirs(tmp_dir) with tarfile.open(infile.name) as tar: - tar.extractall(path=tmp_dir) + def is_within_directory(directory, target): + + abs_directory = os.path.abspath(directory) + abs_target = os.path.abspath(target) + + prefix = os.path.commonprefix([abs_directory, abs_target]) + + return prefix == abs_directory + + def safe_extract(tar, path=".", members=None, *, numeric_owner=False): + + for member in tar.getmembers(): + member_path = os.path.join(path, member.name) + if not is_within_directory(path, member_path): + raise Exception("Attempted Path Traversal in Tar File") + + tar.extractall(path, members, numeric_owner=numeric_owner) + + + safe_extract(tar, path=tmp_dir) model = keras.models.load_model(os.path.join(tmp_dir, 'SavedModel'))