{"id":114657,"date":"2024-03-30T00:25:55","date_gmt":"2024-03-29T22:25:55","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-kode-xz-versij-5-6-0-i-5-6-1-obnaruzhen-bekdor"},"modified":"2024-03-30T00:25:55","modified_gmt":"2024-03-29T22:25:55","slug":"v-kode-xz-versij-5-6-0-i-5-6-1-obnaruzhen-bekdor","status":"publish","type":"post","link":"https:\/\/prohoster.info\/es\/blog\/news\/v-kode-xz-versij-5-6-0-i-5-6-1-obnaruzhen-bekdor","title":{"rendered":"Se ha encontrado un backdoor en el c\u00f3digo de las versiones 5.6.0 y 5.6.1 de xz.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>El desarrollador de Debian e investigador en seguridad inform\u00e1tica, Andres Freund, informa sobre el descubrimiento de un probable backdoor en el c\u00f3digo fuente de xz versiones 5.6.0 y 5.6.1.<\/p>\n<p> <noindex><noindex><\/p>\n<p>El backdoor consiste en <a rel=\"nofollow\" href=\"https:\/\/salsa.debian.org\/debian\/xz-utils\/-\/blob\/debian\/unstable\/m4\/build-to-host.m4?ref_type=heads#L63\">una l\u00ednea en uno de los scripts m4<\/a>, que escribe c\u00f3digo malicioso ofuscado al final del script configure. Este c\u00f3digo modifica uno de los Makefile generados del proyecto, lo que finalmente lleva a que el c\u00f3digo malicioso (camuflado como un archivo de prueba bad-3-corrupt_lzma2.xz) se incluya en el archivo binario liblzma.<\/p>\n<p><\/noindex><\/noindex> <\/p>\n<p>La peculiaridad del incidente es que el c\u00f3digo malicioso se encuentra <em>solo<\/em> en los archivos tar distribuidos con el c\u00f3digo fuente y no est\u00e1 presente en el repositorio git del proyecto.<\/p>\n<p>Se informa que la persona bajo cuyo nombre se a\u00f1adi\u00f3 el c\u00f3digo malicioso al repositorio del proyecto est\u00e1 o bien directamente implicada en el incidente, o ha sido v\u00edctima de una grave compromizaci\u00f3n de sus cuentas personales (pero el investigador tiende a la primera opci\u00f3n, ya que esta persona particip\u00f3 personalmente en varias discusiones relacionadas con los cambios maliciosos).<\/p>\n<p>En un enlace, el investigador se\u00f1ala que, en \u00faltima instancia, el objetivo del backdoor parece ser inyectar c\u00f3digo en el proceso sshd y alterar la verificaci\u00f3n de claves RSA, y proporciona varias maneras de comprobar indirectamente si el c\u00f3digo malicioso se est\u00e1 ejecutando en su sistema en este momento.<\/p>\n<p> <noindex><\/p>\n<p>Seg\u00fan un art\u00edculo de noticias <a rel=\"nofollow\" href=\"https:\/\/news.opensuse.org\/2024\/03\/29\/xz-backdoor\/\">del proyecto openSUSE<\/a>, debido a la complejidad del c\u00f3digo del backdoor y el supuesto mecanismo de su explotaci\u00f3n, es dif\u00edcil establecer si ha &laquo;funcionado&raquo; en esta m\u00e1quina, y se recomienda una reinstalaci\u00f3n completa del sistema operativo con la rotaci\u00f3n de todas las claves relevantes en todas las m\u00e1quinas en las que al menos una vez se encontraron versiones infectadas de xz.<\/p>\n<p><\/noindex><\/p>\n<p>Fuente: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.linux.org.ru\/news\/security\/17567724\">linux.org.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a Debian \u0438 \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c \u0432 \u0441\u0444\u0435\u0440\u0435 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 Andres Freund \u0441\u043e\u043e\u0431\u0449\u0430\u0435\u0442 \u043e\u0431 \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u0438\u0438 \u0432\u0435\u0440\u043e\u044f\u0442\u043d\u043e\u0433\u043e \u0431\u044d\u043a\u0434\u043e\u0440\u0430 \u0432 \u0438\u0441\u0445\u043e\u0434\u043d\u043e\u043c \u043a\u043e\u0434\u0435 xz \u0432\u0435\u0440\u0441\u0438\u0439 5.6.0 \u0438 5.6.1. \u0411\u044d\u043a\u0434\u043e\u0440 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 \u0441\u043e\u0431\u043e\u0439 \u0441\u0442\u0440\u043e\u0447\u043a\u0443 \u0432 \u043e\u0434\u043d\u043e\u043c \u0438\u0437 m4-\u0441\u043a\u0440\u0438\u043f\u0442\u043e\u0432, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0434\u043e\u043f\u0438\u0441\u044b\u0432\u0430\u0435\u0442 \u043e\u0431\u0444\u0443\u0441\u0446\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u0432\u0440\u0435\u0434\u043e\u043d\u043e\u0441\u043d\u044b\u0439 \u043a\u043e\u0434 \u0432 \u043a\u043e\u043d\u0435\u0446 \u0441\u043a\u0440\u0438\u043f\u0442\u0430 configure. \u042d\u0442\u043e\u0442 \u043a\u043e\u0434 \u0437\u0430\u0442\u0435\u043c \u043c\u043e\u0434\u0438\u0444\u0438\u0446\u0438\u0440\u0443\u0435\u0442 \u043e\u0434\u0438\u043d \u0438\u0437 \u0441\u0433\u0435\u043d\u0435\u0440\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 Makefile \u043f\u0440\u043e\u0435\u043a\u0442\u0430, \u0447\u0442\u043e \u0432 \u043a\u043e\u043d\u0435\u0447\u043d\u043e\u043c \u0438\u0442\u043e\u0433\u0435 \u043f\u0440\u0438\u0432\u043e\u0434\u0438\u0442 \u043a [&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-114657","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2 - 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