const char *ssl_get_ciphersuite( const ssl_context *ssl )
{
    if( ssl == NULL || ssl->session == NULL )
        return NULL;

    return ssl_get_ciphersuite_name( ssl->session->ciphersuite );
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.