int dtls1_dispatch_alert(SSL *s)
	{
	int i,j;
	void (*cb)(const SSL *ssl,int type,int val)=NULL;
	unsigned char buf[DTLS1_AL_HEADER_LENGTH];
	unsigned char *ptr = &buf[0];

	s->s3->alert_dispatch=0;

	memset(buf, 0x00, sizeof(buf));
	*ptr++ = s->s3->send_alert[0];
	*ptr++ = s->s3->send_alert[1];

#ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
	if (s->s3->send_alert[1] == DTLS1_AD_MISSING_HANDSHAKE_MESSAGE)
		{	
		s2n(s->d1->handshake_read_seq, ptr);
#if 0
		if ( s->d1->r_msg_hdr.frag_off == 0)  /* waiting for a new msg */

		else
			s2n(s->d1->r_msg_hdr.seq, ptr); /* partial msg read */
#endif

#if 0
		fprintf(stderr, "s->d1->handshake_read_seq = %d, s->d1->r_msg_hdr.seq = %d\n",s->d1->handshake_read_seq,s->d1->r_msg_hdr.seq);
#endif
		l2n3(s->d1->r_msg_hdr.frag_off, ptr);
		}
#endif

	i = do_dtls1_write(s, SSL3_RT_ALERT, &buf[0], sizeof(buf), 0);
	if (i <= 0)
		{
		s->s3->alert_dispatch=1;
		/* fprintf( stderr, "not done with alert\n" ); */
		}
	else
		{
		if (s->s3->send_alert[0] == SSL3_AL_FATAL
#ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
		    || s->s3->send_alert[1] == DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
#endif
		    )
			(void)BIO_flush(s->wbio);

		if (s->msg_callback)
			s->msg_callback(1, s->version, SSL3_RT_ALERT, s->s3->send_alert, 
				2, s, s->msg_callback_arg);

		if (s->info_callback != NULL)
			cb=s->info_callback;
		else if (s->ctx->info_callback != NULL)
			cb=s->ctx->info_callback;

		if (cb != NULL)
			{
			j=(s->s3->send_alert[0]<<8)|s->s3->send_alert[1];
			cb(s,SSL_CB_WRITE_ALERT,j);
			}
		}
	return(i);
	}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.