    def test_s3_malicious_tarballs(self):
        self.assertRaises(exception.Error,
            self.image_service._test_for_malicious_tarball,
            "/unused", os.path.join(os.path.dirname(__file__), 'abs.tar.gz'))
        self.assertRaises(exception.Error,
            self.image_service._test_for_malicious_tarball,
            "/unused", os.path.join(os.path.dirname(__file__), 'rel.tar.gz'))
The software uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the software does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.