diff --git a/venv/lib/python3.6/site-packages/chatterbot/trainers.py b/venv/lib/python3.6/site-packages/chatterbot/trainers.py index d5cc08a..e425191 100644 --- a/venv/lib/python3.6/site-packages/chatterbot/trainers.py +++ b/venv/lib/python3.6/site-packages/chatterbot/trainers.py @@ -316,7 +316,26 @@ def track_progress(members): yield member with tarfile.open(file_path) as tar: - tar.extractall(path=self.extracted_data_directory, members=track_progress(tar)) + 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=self.extracted_data_directory, members=track_progress(tar)) self.chatbot.logger.info('File extracted to {}'.format(self.extracted_data_directory))