{"id":20166,"date":"2024-04-29T10:40:33","date_gmt":"2024-04-29T13:40:33","guid":{"rendered":"https:\/\/ostec.blog\/?p=20166"},"modified":"2024-04-29T10:40:33","modified_gmt":"2024-04-29T13:40:33","slug":"cve-2023-45678-vulnerabilidad-critica-en-el-microsoft-exchange-server","status":"publish","type":"post","link":"https:\/\/ostec.blog\/es\/general-seguridad\/cve-2023-45678-vulnerabilidad-critica-en-el-microsoft-exchange-server\/","title":{"rendered":"CVE-2023-45678: Vulnerabilidad cr\u00edtica en el Microsoft Exchange Server"},"content":{"rendered":"<p>CVE-2023-45678 es una vulnerabilidad de seguridad cr\u00edtica en <a href=\"https:\/\/www.microsoft.com\/pt-br\/microsoft-365\/exchange\/email\">Microsoft Exchange Server<\/a> que puede ser explotada para ejecutar c\u00f3digo arbitrario en el sistema. Esto afecta a versiones espec\u00edficas:<\/p>\n<ul>\n<li>Exchange Server 2019 CU20 y posteriores<\/li>\n<li>Exchange Server 2016 CU22 y posteriores<\/li>\n<li>Exchange Server 2013 CU22 y posteriores<\/li>\n<\/ul>\n<p>\u00bfC\u00f3mo funciona? La vulnerabilidad se debe a un error al procesar archivos OGG Vorbis en un componente de Microsoft Exchange Server. Un atacante puede aprovechar esto enviando un archivo OGG Vorbis especialmente dise\u00f1ado al servidor Exchange. El archivo malicioso podr\u00eda causar un desbordamiento de b\u00fafer, permitiendo al atacante ejecutar c\u00f3digo en el sistema.<\/p>\n<p>La gravedad del CVE-2023-45678 es cr\u00edtica, con una puntuaci\u00f3n CVSS v3 Base Score: 9.8. En t\u00e9rminos simples, esto significa que es f\u00e1cilmente explotable por atacantes experimentados y podr\u00eda causar problemas significativos en los sistemas afectados. <\/p>\n<h2>Recomendaciones para el CVE-2023-45678<\/h2>\n<p>Para corregir la CVE-2023-45678, instala los \u00faltimos parches de seguridad seg\u00fan tu versi\u00f3n de Microsoft Exchange Server, que son los siguientes:<\/p>\n<ul>\n<li>Para Microsoft Exchange Server 2019: KB5015021;<\/li>\n<li>Para Microsoft Exchange Server 2016: KB5015022;<\/li>\n<li>Para Microsoft Exchange Server 2013: KB5015023.<\/li>\n<\/ul>\n<p>Esos parches est\u00e1n disponibles en el sitio web de soporte de Microsoft.<\/p>\n<p>Para instalar las actualizaciones, siga estos pasos:<\/p>\n<p>1.\tEn el servidor Exchange, abre el s\u00edmbolo del sistema como administrador.<br \/>\n2.\tEscribe \u00absetup.exe\/updateonly\u00bb y presiona enter.<br \/>\n3.\tSiga las instrucciones en pantalla para completar la instalaci\u00f3n.<\/p>\n<p>Despu\u00e9s de instalar el parche, es necesario reiniciar el servidor Exchange.<\/p>\n<p>Microsoft recomienda que los administradores instalen los parches lo antes posible para proteger sus sistemas contra esta vulnerabilidad.<\/p>\n<p>Adem\u00e1s de instalar el parche, se recomiendan las siguientes medidas para ayudar a mitigar el riesgo de explotaci\u00f3n de esta vulnerabilidad:<\/p>\n<ul>\n<li>Habilitar la autenticaci\u00f3n moderna para Microsoft Exchange Server.<\/li>\n<li>Activar el filtrado de correo electr\u00f3nico para bloquear archivos OGG Vorbis maliciosos.<\/li>\n<li>Implemente un sistema de detecci\u00f3n y respuesta a incidentes (<a href=\"https:\/\/ostec.blog\/es\/aprendizaje-descubrimiento\/gestion-de-eventos-e-informacion-de-seguridad-siem\/\">SIEM<\/a>) para monitorear el tr\u00e1fico de red y detectar intentos de explotar esta vulnerabilidad. <\/li>\n<\/ul>\n<ul>Importante:<br \/>\nMicrosoft insta a los administradores a instalar los parches lo antes posible para proteger sus sistemas contra esta vulnerabilidad.<\/p>\n<p>Si necesitas ayuda, contacta a un experto en ciberseguridad \u00a1No subestimes la seguridad de tu sistema! Sigue estas medidas para mantenerte protegido.<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>CVE-2023-45678 es una vulnerabilidad de seguridad cr\u00edtica en Microsoft Exchange Server que puede ser explotada para ejecutar c\u00f3digo arbitrario en el sistema. Esto afecta a versiones espec\u00edficas: Exchange Server 2019 CU20 y posteriores Exchange Server 2016 CU22 y posteriores Exchange Server 2013 CU22 y posteriores \u00bfC\u00f3mo funciona? La vulnerabilidad se debe a un error al [&hellip;]<\/p>\n","protected":false},"author":14,"featured_media":20148,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1018,1019],"tags":[1778,1869,1883],"class_list":["post-20166","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-general-seguridad","category-generico","tag-cve-es","tag-microsoft-es","tag-patches-de-seguranca-es"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>CVE-2023-45678: Vulnerabilidad cr\u00edtica en el Microsoft Exchange Server - OSTEC | Seguran\u00e7a digital de resultados<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ostec.blog\/es\/general-seguridad\/cve-2023-45678-vulnerabilidad-critica-en-el-microsoft-exchange-server\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"CVE-2023-45678: Vulnerabilidad cr\u00edtica en el Microsoft Exchange Server - OSTEC | Seguran\u00e7a digital de resultados\" \/>\n<meta property=\"og:description\" content=\"CVE-2023-45678 es una vulnerabilidad de seguridad cr\u00edtica en Microsoft Exchange Server que puede ser explotada para ejecutar c\u00f3digo arbitrario en el sistema. 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