{"id":111480,"date":"2023-11-13T15:10:13","date_gmt":"2023-11-13T13:10:13","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimosti-v-openvpn-i-softether-vpn"},"modified":"2023-11-13T15:10:13","modified_gmt":"2023-11-13T13:10:13","slug":"uyazvimosti-v-openvpn-i-softether-vpn","status":"publish","type":"post","link":"https:\/\/prohoster.info\/es\/blog\/news\/uyazvimosti-v-openvpn-i-softether-vpn","title":{"rendered":"Vulnerabilidades en OpenVPN y SoftEther VPN","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Se ha preparado la versi\u00f3n OpenVPN 2.6.7, un paquete para crear redes privadas virtuales que permite establecer una conexi\u00f3n cifrada entre dos m\u00e1quinas cliente o proporcionar el funcionamiento de un servidor VPN centralizado para el uso simult\u00e1neo de varios clientes. En la nueva versi\u00f3n se han corregido dos vulnerabilidades:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2023-46850 \u2014 el acceso a la memoria despu\u00e9s de liberarla (use-after-free) puede resultar en el env\u00edo de contenido de la memoria del proceso a otra parte de la conexi\u00f3n, as\u00ed como, potencialmente, en la ejecuci\u00f3n remota de c\u00f3digo. El problema se manifiesta en configuraciones que utilizan TLS (ejecutadas sin el par\u00e1metro \u00ab\u2014secret\u00bb).\n<li class=\"l\"> CVE-2023-46849 \u2014 la aparici\u00f3n de una situaci\u00f3n de divisi\u00f3n por cero puede llevar a la finalizaci\u00f3n an\u00f3mala del servidor de acceso de forma remota en configuraciones que utilizan la opci\u00f3n \u00ab\u2014fragment\u00bb.    <\/ul>\n<p>De los cambios no relacionados con la seguridad en OpenVPN 2.6.7:  <\/p>\n<ul>\n<li class=\"l\"> Se a\u00f1adi\u00f3 una advertencia al enviar paquetes DATA_V1 por otra parte al intentar que un cliente de OpenVPN 2.6.x se conecte a servidores incompatibles basados en las versiones 2.4.0-2.4.4 (para solucionar la incompatibilidad se puede usar la opci\u00f3n \u00ab\u2014disable-dco\u00bb).\n<li class=\"l\"> Se ha eliminado el m\u00e9todo obsoleto vinculado a OpenSSL 1.x que utilizaba OpenSSL Engine para cargar claves. La raz\u00f3n dada es el deseo del autor de no volver a licenciar el c\u00f3digo con nuevas excepciones de vinculaci\u00f3n.\n<li class=\"l\"> Se ha a\u00f1adido una advertencia al conectar un cliente p2p NCP a <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/es\/server\/dts-shicago\/\"   title=\"servidor\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2912\">servidor<\/a> p2mp (una combinaci\u00f3n utilizada para trabajar sin el acuerdo de cifrados), ya que hay problemas al usar versiones 2.6.x en ambos lados de la conexi\u00f3n.\n<li class=\"l\"> Se a\u00f1adi\u00f3 una advertencia de que la bandera \u00ab\u2014show-groups\u00bb no muestra todos los grupos admitidos.\n<li class=\"l\"> En el par\u00e1metro \u00ab\u2014dns\u00bb se elimin\u00f3 el procesamiento del argumento \u00abexclude-domains\u00bb, que apareci\u00f3 en la rama 2.6, pero que a\u00fan no es compatible con los backends.\n<li class=\"l\"> Se ha a\u00f1adido una advertencia que se muestra si el mensaje de control INFO es demasiado grande y no puede ser redirigido al cliente.\n<li class=\"l\"> Para las compilaciones que utilizan MinGW y MSVC, se ha a\u00f1adido soporte para el sistema de compilaci\u00f3n CMake. Se ha eliminado el soporte para el antiguo sistema de compilaci\u00f3n MSVC.  <\/ul>\n<p>Adicionalmente, se puede destacar la detecci\u00f3n de 9 vulnerabilidades en el c\u00f3digo abierto <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/es\/vpn\/\"   title=\"VPN\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"213\">VPN<\/a>-servidor SoftEther. Uno de los problemas (CVE-2023-27395) ha sido clasificado como de alto riesgo \u2014 la vulnerabilidad es causada por un desbordamiento de b\u00fafer y puede llevar a la ejecuci\u00f3n remota de c\u00f3digo en el lado del cliente al intentar conectarse a un servidor controlado por un atacante. La vulnerabilidad ha sido solucionada en la actualizaci\u00f3n de junio de SoftEther VPN 4.42 Build 9798 RTM. Otras dos vulnerabilidades (CVE-2023-32634, CVE-2023-27516) permiten el acceso no autorizado a la sesi\u00f3n VPN durante un ataque MITM mediante el uso de credenciales predeterminadas para el servidor RPC. Las vulnerabilidades han sido resueltas en forma de parche.    <\/p>\n<p>Las vulnerabilidades CVE-2023-31192 y CVE-2023-32275 (parche) pueden resultar en la filtraci\u00f3n de informaci\u00f3n confidencial en ciertos paquetes como resultado de ataques MITM. Las 4 vulnerabilidades restantes (CVE-2023-22325, CVE-2023-23581, CVE-2023-22308 y CVE-2023-25774) pueden ser explotadas para provocar denegaci\u00f3n de servicio, por ejemplo, forzando la desconexi\u00f3n o el cierre inesperado del cliente. Recientemente, tambi\u00e9n se ha incluido en la base de c\u00f3digo de SoftEther VPN una correcci\u00f3n para 7 vulnerabilidades, cuyos detalles a\u00fan no se conocen.<br \/>\n<br \/>Fuente: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=60103\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043b\u0435\u043d \u0432\u044b\u043f\u0443\u0441\u043a OpenVPN 2.6.7, \u043f\u0430\u043a\u0435\u0442\u0430 \u0434\u043b\u044f \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u0432\u0438\u0440\u0442\u0443\u0430\u043b\u044c\u043d\u044b\u0445 \u0447\u0430\u0441\u0442\u043d\u044b\u0445 \u0441\u0435\u0442\u0435\u0439, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0433\u043e \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u0448\u0438\u0444\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0435 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 \u043c\u0435\u0436\u0434\u0443 \u0434\u0432\u0443\u043c\u044f \u043a\u043b\u0438\u0435\u043d\u0442\u0441\u043a\u0438\u043c\u0438 \u043c\u0430\u0448\u0438\u043d\u0430\u043c\u0438 \u0438\u043b\u0438 \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0442\u044c \u0440\u0430\u0431\u043e\u0442\u0443 \u0446\u0435\u043d\u0442\u0440\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e VPN-\u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u0434\u043b\u044f \u043e\u0434\u043d\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439 \u0440\u0430\u0431\u043e\u0442\u044b \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u0438\u0445 \u043a\u043b\u0438\u0435\u043d\u0442\u043e\u0432. \u0412 \u043d\u043e\u0432\u043e\u0439 \u0432\u0435\u0440\u0441\u0438\u0438 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0434\u0432\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438: CVE-2023-46850 &#8212; \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u0435 \u043a \u043e\u0431\u043b\u0430\u0441\u0442\u0438 \u043f\u0430\u043c\u044f\u0442\u0438 \u043f\u043e\u0441\u043b\u0435 \u0435\u0451 \u043e\u0441\u0432\u043e\u0431\u043e\u0436\u0434\u0435\u043d\u0438\u044f (use-after-free) \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0435 \u043d\u0430 \u0434\u0440\u0443\u0433\u0443\u044e \u0441\u0442\u043e\u0440\u043e\u043d\u0443 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u044f \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0433\u043e \u043f\u0430\u043c\u044f\u0442\u0438 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0430, [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-111480","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043b\u0435\u043d \u0432\u044b\u043f\u0443\u0441\u043a OpenVPN 2.6.7, \u043f\u0430\u043a\u0435\u0442\u0430 \u0434\u043b\u044f \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u0432\u0438\u0440\u0442\u0443\u0430\u043b\u044c\u043d\u044b\u0445 \u0447\u0430\u0441\u0442\u043d\u044b\u0445 \u0441\u0435\u0442\u0435\u0439, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0433\u043e 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