{"id":103040,"date":"2022-01-20T21:36:44","date_gmt":"2022-01-20T19:36:44","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/%d1%83%d1%8f%d0%b7%d0%b2%d0%b8%d0%bc%d0%be%d1%81%d1%82%d1%8c-%d0%b2-%d1%81%d1%82%d0%b0%d0%bd%d0%b4%d0%b0%d1%80%d1%82%d0%bd%d0%be%d0%b9-%d0%b1%d0%b8%d0%b1%d0%bb%d0%b8%d0%be%d1%82%d0%b5%d0%ba%d0%b5"},"modified":"2022-01-20T21:36:44","modified_gmt":"2022-01-20T19:36:44","slug":"%d1%83%d1%8f%d0%b7%d0%b2%d0%b8%d0%bc%d0%be%d1%81%d1%82%d1%8c-%d0%b2-%d1%81%d1%82%d0%b0%d0%bd%d0%b4%d0%b0%d1%80%d1%82%d0%bd%d0%be%d0%b9-%d0%b1%d0%b8%d0%b1%d0%bb%d0%b8%d0%be%d1%82%d0%b5%d0%ba%d0%b5","status":"publish","type":"post","link":"https:\/\/prohoster.info\/fr\/blog\/news\/%d1%83%d1%8f%d0%b7%d0%b2%d0%b8%d0%bc%d0%be%d1%81%d1%82%d1%8c-%d0%b2-%d1%81%d1%82%d0%b0%d0%bd%d0%b4%d0%b0%d1%80%d1%82%d0%bd%d0%be%d0%b9-%d0%b1%d0%b8%d0%b1%d0%bb%d0%b8%d0%be%d1%82%d0%b5%d0%ba%d0%b5","title":{"rendered":"Vuln\u00e9rabilit\u00e9 dans la biblioth\u00e8que standard du langage Rust","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Une vuln\u00e9rabilit\u00e9 (CVE-2022-21658) a \u00e9t\u00e9 identifi\u00e9e dans la biblioth\u00e8que standard du langage Rust, li\u00e9e \u00e0 une condition de course dans la fonction std::fs::remove_dir_all(). Lors de l'utilisation de cette fonction pour supprimer des fichiers temporaires dans une application privil\u00e9gi\u00e9e, un attaquant peut r\u00e9ussir \u00e0 supprimer des fichiers et r\u00e9pertoires syst\u00e8me arbitraires, auxquels il n'aurait normalement pas acc\u00e8s.      <\/p>\n<p>La vuln\u00e9rabilit\u00e9 est caus\u00e9e par une mise en \u0153uvre incorrecte de la v\u00e9rification des liens symboliques avant la suppression r\u00e9cursive des r\u00e9pertoires. Au lieu d'interdire le suivi des liens symboliques, la fonction remove_dir_all() v\u00e9rifie d'abord si le fichier est un lien symbolique. Si un lien est d\u00e9fini, il est supprim\u00e9 comme s'il s'agissait d'un fichier, et si c'est un r\u00e9pertoire \u2014 l'op\u00e9ration de suppression r\u00e9cursive de son contenu est appel\u00e9e. Le probl\u00e8me r\u00e9side dans le fait qu'il existe un l\u00e9ger d\u00e9lai entre la v\u00e9rification et le d\u00e9but de l'op\u00e9ration de suppression.     <\/p>\n<p>Au moment o\u00f9 la v\u00e9rification a d\u00e9j\u00e0 \u00e9t\u00e9 effectu\u00e9e, mais o\u00f9 l'op\u00e9ration de travers\u00e9e des r\u00e9pertoires pour la suppression n'a pas encore commenc\u00e9, un attaquant peut remplacer le r\u00e9pertoire contenant les fichiers temporaires par un lien symbolique. Si cela se produit au bon moment, la fonction remove_dir_all() traitera le lien symbolique comme un r\u00e9pertoire et commencera \u00e0 supprimer le contenu auquel renvoie ce lien. Bien que le succ\u00e8s de l'attaque d\u00e9pende de la pr\u00e9cision du moment de remplacement du r\u00e9pertoire et qu'il soit peu probable d'atteindre le bon moment du premier coup, lors d'exp\u00e9riences, les chercheurs ont r\u00e9ussi \u00e0 r\u00e9aliser des attaques r\u00e9ussies de mani\u00e8re r\u00e9p\u00e9t\u00e9e apr\u00e8s l'ex\u00e9cution de l'exploit pendant plusieurs secondes.    <\/p>\n<p>Toutes les versions de Rust de 1.0.0 \u00e0 1.58.0 inclusivement sont vuln\u00e9rables. Le probl\u00e8me a \u00e9t\u00e9 corrig\u00e9 sous forme de patch (la correction sera incluse dans la version 1.58.1, qui est attendue dans quelques heures). Il est possible de suivre le correctif de la vuln\u00e9rabilit\u00e9 dans les distributions sur les pages suivantes : Debian, RHEL, SUSE, Fedora, Ubuntu, Arch, FreeBSD. Tous les utilisateurs d'applications \u00e9crites en Rust, ex\u00e9cut\u00e9es avec des privil\u00e8ges \u00e9lev\u00e9s et utilisant la fonction remove_dir_all, sont fortement encourag\u00e9s \u00e0 mettre \u00e0 jour Rust vers la version 1.58.1. Fait int\u00e9ressant, le patch publi\u00e9 ne r\u00e9sout pas le probl\u00e8me sur tous les syst\u00e8mes ; par exemple, dans le syst\u00e8me d'exploitation REDOX et dans les versions de macOS ant\u00e9rieures \u00e0 10.10 (Yosemite), la vuln\u00e9rabilit\u00e9 n'est pas bloqu\u00e9e en raison de l'absence du drapeau O_NOFOLLOW, qui emp\u00eache le suivi des liens symboliques.<br \/>\n<br \/>Source : <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=56551\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043d\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0435 \u044f\u0437\u044b\u043a\u0430 Rust \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2022-21658), \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u0430\u044f \u0441 \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435\u043c \u0433\u043e\u043d\u043a\u0438 \u0432 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 std::fs::remove_dir_all(). \u0412 \u0441\u043b\u0443\u0447\u0430\u0435 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0434\u0430\u043d\u043d\u043e\u0439 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 \u0434\u043b\u044f \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u044f \u0432\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445 \u0444\u0430\u0439\u043b\u043e\u0432 \u0432 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u043c \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0438, \u0437\u043b\u043e\u0443\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0438\u043a \u043c\u043e\u0436\u0435\u0442 \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u044f \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u044b\u0445 \u0444\u0430\u0439\u043b\u043e\u0432 \u0438 \u043a\u0430\u0442\u0430\u043b\u043e\u0433\u043e\u0432, \u043a \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u044e \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0432 \u043e\u0431\u044b\u0447\u043d\u044b\u0445 \u0443\u0441\u043b\u043e\u0432\u0438\u044f\u0445 \u0443 \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0435\u0433\u043e \u043d\u0435\u0442 \u0434\u043e\u0441\u0442\u0443\u043f\u0430. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u043d\u0435\u043a\u043e\u0440\u0440\u0435\u043a\u0442\u043d\u043e\u0439 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0435\u0439 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u0441\u0438\u043c\u0432\u043e\u043b\u0438\u0447\u0435\u0441\u043a\u0438\u0445 \u0441\u0441\u044b\u043b\u043e\u043a \u043f\u0435\u0440\u0435\u0434 \u0440\u0435\u043a\u0443\u0440\u0441\u0438\u0432\u043d\u044b\u043c [&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-103040","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=\"\u0412 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043d\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0435 \u044f\u0437\u044b\u043a\u0430 Rust \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2022-21658), \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u0430\u044f \u0441 \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435\u043c \u0433\u043e\u043d\u043a\u0438 \u0432 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