{"id":48140,"date":"2025-09-17T17:59:38","date_gmt":"2025-09-17T17:59:38","guid":{"rendered":"https:\/\/becolve.com\/blog\/patches-no-dcom-da-microsoft-quebram-comunicacoes-opc-da-2\/"},"modified":"2025-09-17T17:59:42","modified_gmt":"2025-09-17T17:59:42","slug":"patches-no-dcom-da-microsoft-quebram-comunicacoes-opc-da-2","status":"publish","type":"blog","link":"https:\/\/becolve.com\/pt-pt\/blog\/patches-no-dcom-da-microsoft-quebram-comunicacoes-opc-da-2\/","title":{"rendered":"Patches no DCOM da Microsoft \u201cquebram\u201d comunica\u00e7\u00f5es OPC DA"},"content":{"rendered":"<p>[et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.16&#8243; da_disable_devices=&#8221;off|off|off&#8221; global_colors_info=&#8221;{}&#8221; da_is_popup=&#8221;off&#8221; da_exit_intent=&#8221;off&#8221; da_has_close=&#8221;on&#8221; da_alt_close=&#8221;off&#8221; da_dark_close=&#8221;off&#8221; da_not_modal=&#8221;on&#8221; da_is_singular=&#8221;off&#8221; da_with_loader=&#8221;off&#8221; da_has_shadow=&#8221;on&#8221;][et_pb_row _builder_version=&#8221;4.16&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.16&#8243; custom_padding=&#8221;|||&#8221; global_colors_info=&#8221;{}&#8221; custom_padding__hover=&#8221;|||&#8221;][et_pb_text _builder_version=&#8221;4.19.5&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-11278 alignnone size-full\" src=\"https:\/\/becolve.com\/wp-content\/uploads\/2023\/04\/parche-DCOM.jpeg\" alt=\"vidro preto partido\" width=\"758\" height=\"505\"><\/p>\n<p>Nas <strong>atualiza\u00e7\u00f5es cumulativas da Microsoft<\/strong> de junho de 2021, foi inclu\u00edda uma corre\u00e7\u00e3o de seguran\u00e7a para limitar a exposi\u00e7\u00e3o de CVE-2021-26414 com CVSS de 4.3, onde um potencial atacante poderia contornar as op\u00e7\u00f5es de seguran\u00e7a implementadas no DCOM. A <strong>corre\u00e7\u00e3o \u00e9 a KB5004442<\/strong>. <\/p>\n<p>Esta corre\u00e7\u00e3o tinha uma s\u00e9rie de etapas para facilitar a atualiza\u00e7\u00e3o de todos os tipos de sistemas:<\/p>\n<ul>\n<li>8 de junho de 2021, corre\u00e7\u00e3o por defeito desativada.<\/li>\n<li>14 de junho de 2022, corre\u00e7\u00e3o por defeito ativada, mas com a possibilidade de desativ\u00e1-la.<\/li>\n<li>14 de mar\u00e7o de 2023, corre\u00e7\u00e3o ativada e sem possibilidade de desativ\u00e1-la.<\/li>\n<\/ul>\n<p>A partir de <strong>mar\u00e7o de 2023<\/strong>, esta corre\u00e7\u00e3o aumenta o <strong>n\u00edvel de seguran\u00e7a exigido para as comunica\u00e7\u00f5es DCOM<\/strong> sem possibilidade de ser desativado. Recordamos que o DCOM (Distributed Component Object Model) \u00e9 um protocolo empregado para expor os objetos de uma aplica\u00e7\u00e3o aos RPC (Remote Procedure Calls) e, desta forma, os diferentes componentes de dispositivos possam comunicar por rede. <\/p>\n<p>Todas as aplica\u00e7\u00f5es que utilizam a <strong>API do Windows para estabelecer liga\u00e7\u00f5es DCOM<\/strong> entre dois dispositivos s\u00e3o afetadas. Um exemplo: OPC-DA. <\/p>\n<p>O <strong>OPC-DA cl\u00e1ssico<\/strong> utiliza as <strong>comunica\u00e7\u00f5es DCOM<\/strong> para passar informa\u00e7\u00e3o entre dispositivos. A aplica\u00e7\u00e3o desta corre\u00e7\u00e3o, a partir de 14 de mar\u00e7o de 2023, tem impacto em toda a comunica\u00e7\u00e3o OPC-DA, j\u00e1 que os clientes e servidores devem utilizar o mesmo n\u00edvel de autentica\u00e7\u00e3o DCOM. <\/p>\n<p>A liga\u00e7\u00e3o entre <strong>servidores e clientes OPC DA<\/strong> atrav\u00e9s de uma rede requer DCOM. Com a aplica\u00e7\u00e3o obrigat\u00f3ria da <strong>corre\u00e7\u00e3o de seguran\u00e7a KB5004442 da Microsoft<\/strong>, s\u00f3 ser\u00e3o permitidos os dois n\u00edveis mais altos de autoriza\u00e7\u00e3o DCOM. Qualquer liga\u00e7\u00e3o de clientes OPC com configura\u00e7\u00f5es de seguran\u00e7a mais baixas falhar\u00e1.  <\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-11263 aligncenter\" src=\"https:\/\/becolve.com\/wp-content\/uploads\/2023\/04\/OPC-DA.png\" alt=\"Gr\u00e1fico OPC-DA\" width=\"550\" height=\"139\"><\/p>\n<h2>Produtos e vers\u00f5es afetadas<\/h2>\n<ul>\n<li>System Platform 2020 R2 SP1 e posteriores.<\/li>\n<li>System Platform 2017 U3 SP1 P01 e posteriores.<\/li>\n<li>System Platform 2014 R2 SP1 P02.<\/li>\n<li>OI Gateway e FS Gateway.<\/li>\n<li>Edge 2020 R2 SP1 e posteriores.<\/li>\n<li>KEPServerEX 5.20.396 at\u00e9 6.12.<\/li>\n<\/ul>\n<h2>Solu\u00e7\u00f5es<\/h2>\n<p>Em geral, a melhor solu\u00e7\u00e3o \u00e9 <strong>atualizar as aplica\u00e7\u00f5es para a sua vers\u00e3o mais recente<\/strong>. N\u00e3o s\u00f3 para n\u00e3o ser afetado pela corre\u00e7\u00e3o KB5004442 da Microsoft, mas tamb\u00e9m para garantir o n\u00edvel de seguran\u00e7a m\u00e1ximo dos seus sistemas. <\/p>\n<p><strong>Se n\u00e3o for poss\u00edvel atualizar para a vers\u00e3o mais recente dispon\u00edvel<\/strong>, entre em contacto com o nosso departamento de suporte t\u00e9cnico e eles ir\u00e3o aconselh\u00e1-lo sobre a melhor op\u00e7\u00e3o para o seu caso concreto.<\/p>\n<ul>\n<li>FSGateway (todas as vers\u00f5es) &#8211; Atualizar para OI Gateway.<\/li>\n<li>OI Gateway G-2.1 (v5.2 e anteriores) &#8211; Atualizar para vers\u00e3o superior.<\/li>\n<li>OI Gateway G-3.0 a 2020 R3 &#8211; Consultar hotfix adequado para a vers\u00e3o.<\/li>\n<li>OI Gateway 2023 &#8211; Compat\u00edvel com atualiza\u00e7\u00e3o KB5004442<\/li>\n<\/ul>\n<p>De maneira gen\u00e9rica, <strong>se falarmos das comunica\u00e7\u00f5es mediante OPC DA<\/strong>, podemos considerar as seguintes solu\u00e7\u00f5es:<\/p>\n<ol>\n<li><strong>Mover cliente e servidor OPC DA<\/strong> para o mesmo equipamento para evitar comunica\u00e7\u00f5es de rede e a sua autentica\u00e7\u00e3o.<\/li>\n<li><strong>Configurar o n\u00edvel de autentica\u00e7\u00e3o<\/strong> de DCOM tanto no servidor OPC como em todos os clientes.<\/li>\n<li><strong>Substituir o uso de OPC DA<\/strong> por OPC UA, o qual n\u00e3o requer DCOM.<\/li>\n<li><strong>Realizar um \u201ct\u00fanel\u201d<\/strong> das comunica\u00e7\u00f5es OPC DA entre cliente e servidor.<\/li>\n<\/ol>\n<ul>\n<li>Redirecionar o tr\u00e1fego OPC-DA entre 2 servidores KepserverEX utilizando OPC-UA como meio de transporte.<\/li>\n<li>Utilizar a sincroniza\u00e7\u00e3o de DataHub para que um cliente OPC-DA possa ler (e escrever) no servidor, inclusive quando este est\u00e1 detr\u00e1s de uma Firewall sem portas abertas (eliminando a exposi\u00e7\u00e3o da rede de processo e diminuindo os riscos de ciberseguran\u00e7a).<\/li>\n<\/ul>\n<p><strong>N\u00e3o sabe como aplicar qualquer um destes pontos? Ou, pior ainda, n\u00e3o sabe sequer em que ponto se encontra? <\/strong>  N\u00e3o se preocupe, na Becolve Digital temos claro como ajud\u00e1-lo, entre em contacto connosco e estudaremos o seu caso particular.<\/p>\n<p>[\/et_pb_text][et_pb_button button_url=&#8221;https:\/\/promo.logitek.es\/webinar-ultima-actualizacion-de-dcom-como-te-afecta\/&#8221; button_text=&#8221;Inscreva-se no webinar!&#8221; button_alignment=&#8221;center&#8221; _builder_version=&#8221;4.19.5&#8243; _module_preset=&#8221;default&#8221; custom_button=&#8221;on&#8221; button_text_size=&#8221;16px&#8221; button_text_color=&#8221;#FFFFFF&#8221; button_bg_color=&#8221;#000000&#8243; button_border_radius=&#8221;93px&#8221; background_layout=&#8221;dark&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_button][et_pb_button button_url=&#8221;https:\/\/becolve.com\/pt-pt\/&#8221; button_text=&#8221;Contacte a Becolve Digital&#8221; button_alignment=&#8221;center&#8221; _builder_version=&#8221;4.19.5&#8243; _module_preset=&#8221;default&#8221; custom_button=&#8221;on&#8221; button_text_size=&#8221;16px&#8221; button_text_color=&#8221;#FFFFFF&#8221; button_bg_color=&#8221;#000000&#8243; button_border_radius=&#8221;93px&#8221; background_layout=&#8221;dark&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_button][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Todas as aplica\u00e7\u00f5es que utilizam a API do Windows para estabelecer liga\u00e7\u00f5es DCOM entre dois dispositivos s\u00e3o afetadas.<\/p>\n","protected":false},"author":31,"featured_media":48143,"menu_order":0,"template":"","categories":[],"tags":[],"arquitectura":[],"area":[],"sector":[],"experto":[],"weborigen":[29],"productos-tax":[],"soluciones-tax":[],"marcas-tax":[],"coauthors":[],"class_list":["post-48140","blog","type-blog","status-publish","has-post-thumbnail","hentry","weborigen-logitek-es"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO 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