process_demand_active(STREAM s)
 {
 	uint8 type;
 	uint16 len_src_descriptor, len_combined_caps;
	struct stream packet = *s;
 
 	/* at this point we need to ensure that we have ui created */
 	rd_create_ui();
 
 	in_uint32_le(s, g_rdp_shareid);
 	in_uint16_le(s, len_src_descriptor);
 	in_uint16_le(s, len_combined_caps);

	if (!s_check_rem(s, len_src_descriptor))
	{
		rdp_protocol_error("rdp_demand_active(), consume of source descriptor from stream would overrun", &packet);
	}
 	in_uint8s(s, len_src_descriptor);
 
 	logger(Protocol, Debug, "process_demand_active(), shareid=0x%x", g_rdp_shareid);

	rdp_process_server_caps(s, len_combined_caps);

	rdp_send_confirm_active();
	rdp_send_synchronise();
	rdp_send_control(RDP_CTL_COOPERATE);
	rdp_send_control(RDP_CTL_REQUEST_CONTROL);
	rdp_recv(&type);	/* RDP_PDU_SYNCHRONIZE */
	rdp_recv(&type);	/* RDP_CTL_COOPERATE */
	rdp_recv(&type);	/* RDP_CTL_GRANT_CONTROL */
	rdp_send_input(0, RDP_INPUT_SYNCHRONIZE, 0,
		       g_numlock_sync ? ui_get_numlock_state(read_keyboard_state()) : 0, 0);

	if (g_rdp_version >= RDP_V5)
	{
		rdp_enum_bmpcache2();
		rdp_send_fonts(3);
	}
	else
	{
		rdp_send_fonts(1);
		rdp_send_fonts(2);
	}

	rdp_recv(&type);	/* RDP_PDU_UNKNOWN 0x28 (Fonts?) */
	reset_order_state();
}

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.