{"id":184024,"date":"2026-10-28T23:40:36","date_gmt":"2026-10-28T21:40:36","guid":{"rendered":"https:\/\/prohoster.info\/blog\/news\/udalyonnaya-uyazvimost-v-servernyh-uefi-proshivkah-ekspluatiruemaya-cherez-otpravku-icmp-paketa"},"modified":"2026-10-28T23:40:41","modified_gmt":"2026-10-28T21:40:41","slug":"remote-vulnerability-in-server-uefi-firmware-exploitable-by-sending-an-icmp-packet","status":"publish","type":"post","link":"https:\/\/prohoster.info\/es\/blog\/news\/remote-vulnerability-in-server-uefi-firmware-exploitable-by-sending-an-icmp-packet","title":{"rendered":"Vulnerabilidad remota en los firmware UEFI del servidor, explotada a trav\u00e9s del env\u00edo de paquetes ICMP","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>En TianoCore EDK II (Kit de Desarrollo EFI II), una implementaci\u00f3n de referencia de c\u00f3digo abierto de UEFI utilizada en la mayor\u00eda de las placas base para servidores, se ha solucionado una vulnerabilidad cr\u00edtica (CVE-2026-97631). La vulnerabilidad est\u00e1 presente en el controlador PXE y puede ser explotada enviando paquetes ICMP especialmente formateados durante el arranque en redes IPv4 o IPv6. El ataque no requiere autenticaci\u00f3n y permite al atacante ejecutar su c\u00f3digo con privilegios del firmware UEFI en la etapa previa a la transferencia de control al sistema operativo, lo que puede ser utilizado para eludir el mecanismo de verificaci\u00f3n de arranque UEFI Secure Boot e insertar componentes maliciosos en la etapa de arranque.<\/p>\n<p>El problema se debe a un desbordamiento de b\u00fafer en el controlador de mensajes ICMP en el controlador UefiPxeBcDxe, que se utiliza para el arranque PXE y acepta paquetes ICMP durante el arranque a trav\u00e9s de la red para registrar errores de red. El desbordamiento ocurre debido a la colocaci\u00f3n de los mensajes de error recibidos en un b\u00fafer fijo de 504 bytes, sin verificar el tama\u00f1o real de los datos recibidos. Si se env\u00edan m\u00e1s de 504 bytes en el paquete ICMP, la porci\u00f3n que no cabe se escribe fuera del b\u00fafer y se superpone a las estructuras que siguen. <\/p>\n<p>Un ataque puede llevarse a cabo desde la red global; solo es necesario conocer la direcci\u00f3n IP de la v\u00edctima y poder determinar el momento de arranque PXE. Sabiendo qu\u00e9 firmware se utiliza en <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/es\/server\/dts-newyork\/\"   title=\"servidor\" data-wpil-keyword-link=\"linked\">servidor<\/a> la v\u00edctima, el atacante puede preparar un exploit teniendo en cuenta la ubicaci\u00f3n de las estructuras en la memoria de la compilaci\u00f3n espec\u00edfica del firmware y explotar la vulnerabilidad para ejecutar c\u00f3digo a nivel DXE (Entorno de Ejecuci\u00f3n de Controladores), que se ejecuta en el anillo de protecci\u00f3n cero. <\/p>\n<p>El proyecto EDK II fue iniciado en 2004 por Intel y es utilizado por todos los principales fabricantes de firmware para sistemas de servidores, centros de datos y proveedores de nube. Entre otros, se usa en los firmwares de AMI, Insyde y Phoenix. La vulnerabilidad tambi\u00e9n est\u00e1 presente en los firmwares basados en la plataforma Mu de Microsoft, que es un fork de EDK II.<\/p>\n<p>La problem\u00e1tica fue identificada por representantes de las empresas Anthropic y Google, y se program\u00f3 para una divulgaci\u00f3n p\u00fablica coordinada en enero de 2027. Sin embargo, la informaci\u00f3n tuvo que hacerse p\u00fablica antes, ya que un ingeniero de la empresa AMI accidentalmente rompi\u00f3 el embargo y public\u00f3 un pull request p\u00fablico con una correcci\u00f3n, a partir del cual se pod\u00eda entender la naturaleza de la vulnerabilidad.<br \/>\n<br \/>Fuente: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=66565\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 TianoCore EDK II (EFI Development Kit II), \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u0439 \u044d\u0442\u0430\u043b\u043e\u043d\u043d\u043e\u0439 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 UEFI, \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u043e\u0439 \u0432 \u0431\u043e\u043b\u044c\u0448\u0438\u043d\u0441\u0442\u0432\u0435 \u0441\u0435\u0440\u0432\u0435\u0440\u043d\u044b\u0445 \u043c\u0430\u0442\u0435\u0440\u0438\u043d\u0441\u043a\u0438\u0445 \u043f\u043b\u0430\u0442, \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2026-97631). \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u0440\u0438\u0441\u0443\u0442\u0441\u0442\u0432\u0443\u0435\u0442 \u0432 \u0434\u0440\u0430\u0439\u0432\u0435\u0440\u0435 PXE \u0438 \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0430 \u0447\u0435\u0440\u0435\u0437 \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0443 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u044b\u0445 ICMP-\u043f\u0430\u043a\u0435\u0442\u043e\u0432 \u0432\u043e \u0432\u0440\u0435\u043c\u044f \u0441\u0435\u0442\u0435\u0432\u043e\u0439 \u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0438 \u0432 \u0441\u0435\u0442\u044f\u0445 IPv4 \u0438\u043b\u0438 IPv6. \u0410\u0442\u0430\u043a\u0430 \u043d\u0435 \u0442\u0440\u0435\u0431\u0443\u0435\u0442 \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438 \u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0437\u043b\u043e\u0443\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0438\u043a\u0443 \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u0441\u0432\u043e\u0439 \u043a\u043e\u0434 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-184024","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com 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ICMP | ProHoster","description":"En TianoCore EDK II (EFI Development Kit II), una implementaci\u00f3n de referencia abierta de UEFI utilizada en la mayor\u00eda de las placas base de servidores, se ha corregido una vulnerabilidad cr\u00edtica (CVE-2026-97631).","canonical_url":"https:\/\/prohoster.info\/es\/blog\/news\/remote-vulnerability-in-server-uefi-firmware-exploitable-by-sending-an-icmp-packet","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"es_ES","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u0423\u0434\u0430\u043b\u0451\u043d\u043d\u0430\u044f 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\u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2026-97631).","og:url":"https:\/\/prohoster.info\/es\/blog\/news\/remote-vulnerability-in-server-uefi-firmware-exploitable-by-sending-an-icmp-packet","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2026-10-28T21:40:36+00:00","article:modified_time":"2026-10-28T21:40:41+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":[],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/es\/wp-json\/wp\/v2\/posts\/184024","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/es\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/es\/wp-json\/wp\/v2\/comments?post=184024"}],"version-history":[{"count":1,"href":"https:\/\/prohoster.info\/es\/wp-json\/wp\/v2\/posts\/184024\/revisions"}],"predecessor-version":[{"id":184025,"href":"https:\/\/prohoster.info\/es\/wp-json\/wp\/v2\/posts\/184024\/revisions\/184025"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/es\/wp-json\/wp\/v2\/media?parent=184024"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/es\/wp-json\/wp\/v2\/categories?post=184024"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/es\/wp-json\/wp\/v2\/tags?post=184024"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}