{"id":782,"date":"2021-06-28T17:18:58","date_gmt":"2021-06-28T15:18:58","guid":{"rendered":"https:\/\/www.infordisa.com\/soc\/?p=782"},"modified":"2025-08-18T13:18:29","modified_gmt":"2025-08-18T11:18:29","slug":"zyxel-avisa-de-atacs-contra-els-seus-tallafocs-i-vpn","status":"publish","type":"post","link":"https:\/\/www.infordisa.com\/soc\/ca\/zyxel-avisa-de-ataques-contra-sus-cortafuegos-y-vpn\/","title":{"rendered":"Zyxel avisa atacs contra els seus tallafocs i VPN"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"782\" class=\"elementor elementor-782\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-729cd94 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"729cd94\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-2575281\" data-id=\"2575281\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-644e286 elementor-widget elementor-widget-shortcode\" data-id=\"644e286\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\"><span style=\"color: #c02b23;font-weight: bold\">Alta <\/span><img loading=\"lazy\" decoding=\"async\" width=\"10\" height=\"10\" src=\"https:\/\/www.infordisa.com\/soc\/imgs\/alerta-4.png\" alt=\"Alerta 4\"\/><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0dea989 elementor-widget elementor-widget-button\" data-id=\"0dea989\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/cve.mitre.org\/cgi-bin\/cvename.cgi?name=CVE-2021-35029\" target=\"_blank\" rel=\"nofollow\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-icon\">\n\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-external-link-alt\"><\/i>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">CVE-2021-35029<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5fc3966 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"5fc3966\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4613e68 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4613e68\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-dcf2d21\" data-id=\"dcf2d21\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1dc29d0 elementor-widget elementor-widget-text-editor\" data-id=\"1dc29d0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>Recursos afectados<\/strong><\/p><ul><li><a class=\"glossaryLink\" href=\"https:\/\/www.infordisa.com\/soc\/ca\/glosario-definicion\/vpn\/\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">VPN<\/a><\/li><li>USG<\/li><li>ZyWALL<\/li><li>ATP<\/li><li>USG FLEX Series en el modo On-Premise<\/li><\/ul><p>Con versiones de firmware: FCS \/ date codes \/ weekly version<\/p><p><strong>Descripci&oacute;n<\/strong><\/p><p>Los ciberdelincuentes tendr&iacute;an como objetivo los recursos afectados de Zyxel que tengan la gesti&oacute;n remota o <a class=\"glossaryLink\" href=\"https:\/\/www.infordisa.com\/soc\/ca\/glosario-definicion\/ssl\/\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">SSL<\/a> VPN habilitada. Una vez que acceden al dispositivo afectado, podr&iacute;an entrar en la red local de la empresa.<\/p><p><strong>Soluci&oacute;n<\/strong><\/p><p>Por el momento, Zyxel recomienda mantener una <a class=\"glossaryLink\" href=\"https:\/\/www.infordisa.com\/soc\/ca\/glosario-definicion\/politica-de-seguridad\/\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">pol&iacute;tica de seguridad<\/a> adecuada para el acceso remoto a los dispositivos afectados para protegerse de esta <a class=\"glossaryLink\" href=\"https:\/\/www.infordisa.com\/soc\/ca\/glosario-definicion\/vulnerabilidad\/\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">vulnerabilidad<\/a>, por lo que ha publicado una gu&iacute;a para la configuraci&oacute;n de la pol&iacute;tica de acceso remoto. Zyxel recomienda concretamente a los administradores:<\/p><ul><li>Eliminar todas las cuentas de administrador y de usuario desconocidas, en caso de haber sido creadas.<\/li><li>Eliminar pol&iacute;ticas de ruta 1 si son desconocidas.<\/li><li>Eliminar reglas del <a class=\"glossaryLink\" href=\"https:\/\/www.infordisa.com\/soc\/ca\/glosario-definicion\/cortafuegos\/\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">cortafuegos<\/a> y pol&iacute;ticas de seguridad desconocidas.<\/li><li>Eliminar el grupo\/usuarios configurados con &laquo;SSL VPN&raquo; desconocidos.<\/li><\/ul><p>Y en caso de requerir ayuda, contactar con el <a href=\"https:\/\/support.zyxel.eu\/hc\/en-us\/articles\/360014020440\" target=\"_blank\" rel=\"noopener\">Soporte de Zyxel<\/a>.<\/p><p>El aviso de Zyxel incluye videos de ayuda para configurar los dispositivos con los m&iacute;nimos privilegios posibles, cerrar puertos, cambiar la contrase&ntilde;a, parchear los dispositivos con las &uacute;ltimas versiones de firmware y utilizar <a class=\"glossaryLink\" href=\"https:\/\/www.infordisa.com\/soc\/ca\/glosario-definicion\/autenticacion\/\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">autenticaci&oacute;n<\/a> de dos factores. Tambi&eacute;n desde Zyxel indican que est&aacute;n trabajando en otras contramedidas para mitigar la <a class=\"glossaryLink\" href=\"https:\/\/www.infordisa.com\/soc\/ca\/glosario-definicion\/amenaza\/\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">amenaza<\/a>.<\/p><p>Recuerda la importancia de mantener tus sistemas y aplicaciones siempre actualizados.<\/p><p><strong>Detalle<\/strong><br><br>A trav&eacute;s de esta vulnerabilidad, los atacantes intentan acceder a los dispositivos mencionados en el apartado de recursos afectados a trav&eacute;s de la WAN (Wide Area Network). Si lo consiguen, se saltan la autenticaci&oacute;n, estableciendo t&uacute;neles SSL <a class=\"glossaryLink\" href=\"https:\/\/www.infordisa.com\/soc\/ca\/glosario-definicion\/vpn\/\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">VPN<\/a> con cuentas de usuario desconocidas para manipular la configuraci&oacute;n del dispositivo.<\/p><p>El dispositivo afectado podr&iacute;a estar comprometido si los usuarios experimentan dificultades de acceso a la VPN, tr&aacute;fico inusual, problemas de enrutamiento o de inicio de sesi&oacute;n. Tambi&eacute;n si aparecen par&aacute;metros de configuraci&oacute;n desconocidos o problemas con la contrase&ntilde;a.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2435fae elementor-widget elementor-widget-button\" data-id=\"2435fae\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/support.zyxel.eu\/hc\/en-us\/articles\/4402786248466\" target=\"_blank\" rel=\"nofollow\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-icon\">\n\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-external-link-alt\"><\/i>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Referencias<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Recursos afectados <a class=\"glossaryLink\" href=\"https:\/\/www.infordisa.com\/soc\/ca\/glosario-definicion\/vpn\/\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">VPN<\/a> USG ZyWALL ATP USG FLEX Series en el modo On-Premise Con versiones de firmware: FCS \/ date<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[4],"tags":[56,33],"class_list":["post-782","post","type-post","status-publish","format-standard","hentry","category-alertas-de-seguridad","tag-vpn","tag-zyxel","masonry-post","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-25"],"acf":[],"yoast_head":"<title>Zyxel avisa de ataques contra sus cortafuegos y VPN - 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