{"id":123597,"date":"2025-04-18T15:05:07","date_gmt":"2025-04-18T13:05:07","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-ssh-servere-iz-erlang-otp-dopuskayushhaya-udalyonnoe-vypolnenie-koda"},"modified":"2025-04-18T15:05:07","modified_gmt":"2025-04-18T13:05:07","slug":"uyazvimost-v-ssh-servere-iz-erlang-otp-dopuskayushhaya-udalyonnoe-vypolnenie-koda","status":"publish","type":"post","link":"https:\/\/prohoster.info\/es\/blog\/news\/uyazvimost-v-ssh-servere-iz-erlang-otp-dopuskayushhaya-udalyonnoe-vypolnenie-koda","title":{"rendered":"Vulnerabilidad en el servidor SSH de Erlang\/OTP que permite la ejecuci\u00f3n remota de c\u00f3digo","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

En la biblioteca ssh que forma parte de las herramientas de Erlang\/OTP, se ha identificado una vulnerabilidad (CVE-2025-32433) que permite ejecutar c\u00f3digo de forma remota sin necesidad de autenticaci\u00f3n en un servidor SSH creado con la biblioteca vulnerable. Se ha asignado un nivel cr\u00edtico de peligrosidad (10 de 10) a este problema. <\/p>\n

Un investigador de seguridad ya ha preparado un exploit funcional para ejecutar c\u00f3digo en servidores SSH vulnerables. Notablemente, el investigador mencion\u00f3 que el c\u00f3digo fue creado utilizando asistentes de IA como GPT-4, Cursor y Sonnet, basado en el an\u00e1lisis de los cambios realizados para corregir la vulnerabilidad, que incluye una prueba para verificar la remoci\u00f3n del problema. <\/p>\n

La biblioteca del proyecto Erlang\/OTP proporciona implementaciones listas para clientes y servidores<\/a> SSH y SFTP, que soportan el protocolo SSH 2.0. Los servidores SSH problem\u00e1ticos se pueden identificar por la salida del encabezado \u00abSSH-2.0-Erlang\/versi\u00f3n\u00bb. Los servidores SSH basados en Erlang\/OTP se utilizan en sistemas especializados, por ejemplo, en dispositivos IoT y de computaci\u00f3n en el borde, as\u00ed como como herramienta de depuraci\u00f3n: Erlang permite activar f\u00e1cilmente un servidor SSH para la depuraci\u00f3n remota de sus aplicaciones (se supone que esta capacidad de depuraci\u00f3n podr\u00eda haberse dejado habilitada en muchos proyectos escritos en Erlang). El problema tambi\u00e9n se manifiesta en las herramientas de Elixir (implementadas sobre Erlang) y en el framework Phoenix basado en \u00e9l, pero el servidor SSH en Phoenix no acepta solicitudes de redes externas por defecto. <\/p>\n

La vulnerabilidad es causada por un error en el c\u00f3digo de an\u00e1lisis de mensajes, que hace que los mensajes SSH_MSG_CHANNEL_REQUEST que permiten la ejecuci\u00f3n del comando \u00abexec\u00bb se manejen en una etapa anterior a la autenticaci\u00f3n. Ejemplo de c\u00f3digo del exploit: command = \u2018file:write_file(\u00ab\/lab.txt\u00bb, <>).\u2019 return ( b\u2019x62\u201d # SSH_MSG_CHANNEL_REQUEST + struct.pack(\u2018>I\u2019, channel_id) + string_payload(\u2018exec\u2019) + b\u2019x01\u201d # want_reply = true + string_payload(command) ) <\/p>\n

La vulnerabilidad ha sido corregida en las versiones Erlang\/OTP-27.3.3, 26.2.5.11 y 25.3.2.20. Se puede seguir la resoluci\u00f3n de la vulnerabilidad en los siguientes distribuidores: Debian, Ubuntu, Fedora, SUSE\/openSUSE, RHEL, Arch, FreeBSD.
\n
Fuente: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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\u041f\u0440\u0438\u043c\u0435\u0447\u0430\u0442\u0435\u043b\u044c\u043d\u043e, \u0447\u0442\u043e \u043f\u043e \u0441\u043b\u043e\u0432\u0430\u043c \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044f \u043a\u043e\u0434 \u0431\u044b\u043b […]<\/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-123597","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Vulnerabilidad en el servidor SSH de Erlang\/OTP que permite la ejecuci\u00f3n remota de c\u00f3digo | ProHoster","description":"En la biblioteca ssh que forma parte de las herramientas de Erlang\/OTP, se ha identificado una vulnerabilidad (CVE-2025-32433) que permite ejecutar c\u00f3digo de forma remota sin necesidad de autenticaci\u00f3n en un servidor SSH creado con.","canonical_url":"https:\/\/prohoster.info\/es\/blog\/news\/uyazvimost-v-ssh-servere-iz-erlang-otp-dopuskayushhaya-udalyonnoe-vypolnenie-koda","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\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 SSH-\u0441\u0435\u0440\u0432\u0435\u0440\u0435 \u0438\u0437 Erlang\/OTP, \u0434\u043e\u043f\u0443\u0441\u043a\u0430\u044e\u0449\u0430\u044f \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u0435 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u043a\u043e\u0434\u0430 | ProHoster","og:description":"\u0412 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0435 ssh, \u0432\u0445\u043e\u0434\u044f\u0449\u0435\u0439 \u0432 \u0441\u043e\u0441\u0442\u0430\u0432 \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u044f Erlang\/OTP, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2025-32433), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e \u0431\u0435\u0437 \u043f\u0440\u043e\u0445\u043e\u0436\u0434\u0435\u043d\u0438\u044f \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u0441\u0432\u043e\u0439 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