{"id":103151,"date":"2022-01-31T21:36:52","date_gmt":"2022-01-31T19:36:52","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/udalyonnaya-root-uyazvimost-v-samba"},"modified":"2022-01-31T21:36:52","modified_gmt":"2022-01-31T19:36:52","slug":"udalyonnaya-root-uyazvimost-v-samba","status":"publish","type":"post","link":"https:\/\/prohoster.info\/fr\/blog\/news\/udalyonnaya-root-uyazvimost-v-samba","title":{"rendered":"Vuln\u00e9rabilit\u00e9 root distante dans Samba","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Des mises \u00e0 jour correctives pour les versions 4.15.5, 4.14.12 et 4.13.17 ont \u00e9t\u00e9 publi\u00e9es, r\u00e9solvant 3 vuln\u00e9rabilit\u00e9s. La vuln\u00e9rabilit\u00e9 la plus grave (CVE-2021-44142) permet \u00e0 un attaquant distant d'ex\u00e9cuter du code arbitraire avec des droits root sur un syst\u00e8me disposant d'une version vuln\u00e9rable de Samba. Cette vuln\u00e9rabilit\u00e9 a \u00e9t\u00e9 class\u00e9e avec un niveau de gravit\u00e9 de 9.9 sur 10.    <\/p>\n<p>La vuln\u00e9rabilit\u00e9 se manifeste uniquement lors de l'utilisation du module VFS vfs_fruit avec les param\u00e8tres par d\u00e9faut (fruit:metadata=netatalk ou fruit:resource=file), fournissant un niveau suppl\u00e9mentaire de compatibilit\u00e9 avec les clients mac OS et am\u00e9liorant la portabilit\u00e9 des fichiers. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/fr\/server\/dts-dusseldorf\/\"   title=\"serveurs tr\u00e8s charg\u00e9s\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3448\">serveurs tr\u00e8s charg\u00e9s<\/a> Netatalk 3 AFP. Le probl\u00e8me provient d'un d\u00e9bordement de tampon dans le code d'analyse des m\u00e9tadonn\u00e9es avec des attributs \u00e9tendus (EA, xattr), d\u00e9clench\u00e9 lors de l'ouverture de fichiers dans smbd. Pour r\u00e9ussir une attaque, l'utilisateur doit avoir un acc\u00e8s en \u00e9criture aux attributs \u00e9tendus du fichier, et l'attaque peut \u00e9galement \u00eatre men\u00e9e par un utilisateur invit\u00e9 si une telle \u00e9criture lui est autoris\u00e9e.          <\/p>\n<p>Les mises \u00e0 jour des packages dans les distributions peuvent \u00eatre suivies sur les pages : Debian, Ubuntu, RHEL, SUSE, Fedora, Arch, FreeBSD. Comme solution de contournement pour la protection, vous pouvez supprimer le module &#171;fruit&#187; de la liste des &#171;vfs objects&#187; dans smb.conf.      <\/p>\n<p>Les deux autres vuln\u00e9rabilit\u00e9s :  <\/p>\n<ul>\n<li class=\"l\"> La vuln\u00e9rabilit\u00e9 CVE-2022-0336 permet \u00e0 un utilisateur Samba AD DC de se faire passer pour un autre service et de s\u00e9lectionner le trafic destin\u00e9 \u00e0 ce service. Pour attaquer, l'utilisateur doit avoir le droit de modifier l'attribut servicePrincipalName dans le compte.\n<li class=\"l\"> La vuln\u00e9rabilit\u00e9 CVE-2021-44141 peut entra\u00eener une fuite d'informations sur l'existence de fichiers et de r\u00e9pertoires dans la zone de FS en dehors de la partition export\u00e9e de Samba. L'attaque se r\u00e9alise par manipulation des liens symboliques.  <\/ul>\n<p>Source : <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=56615\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 \u043f\u0430\u043a\u0435\u0442\u0430 4.15.5, 4.14.12 \u0438 4.13.17 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c 3 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439. \u041d\u0430\u0438\u0431\u043e\u043b\u0435\u0435 \u043e\u043f\u0430\u0441\u043d\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2021-44142) \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u043c\u0443 \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0435\u043c\u0443 \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0439 \u043a\u043e\u0434 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 root \u043d\u0430 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0439 \u0432\u0435\u0440\u0441\u0438\u0435\u0439 Samba. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0435 \u043f\u0440\u0438\u0441\u0432\u043e\u0435\u043d \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 9.9 \u0438\u0437 10. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0442\u043e\u043b\u044c\u043a\u043e \u043f\u0440\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 VFS-\u043c\u043e\u0434\u0443\u043b\u044f vfs_fruit \u0441 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u0430\u043c\u0438 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e (fruit:metadata=netatalk \u0438\u043b\u0438 fruit:resource=file), \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0432\u0430\u044e\u0449\u0435\u0433\u043e \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c [&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-103151","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\" 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