static void ssl_update_checksum_md5sha1( ssl_context *ssl, unsigned char *buf,
                                         size_t len )
{
     md5_update( &ssl->handshake->fin_md5 , buf, len );
    sha1_update( &ssl->handshake->fin_sha1, buf, len );
}

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.