Уязвимость реализации функции wrap_nettle_hash_fast() криптографической библиотеки GnuTLS, позволяющая нарушителю вызвать отказ в обслуживании

A NULL pointer dereference flaw was found in GnuTLS. As Nettle's hash update functions internally call memcpy, providing zero-length input may cause undefined behavior. This flaw leads to a denial of service after authentication in rare circumstances.