{"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\/it\/blog\/news\/udalyonnaya-root-uyazvimost-v-samba","title":{"rendered":"Vulnerabilit\u00e0 root remota in Samba","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Sono stati pubblicati aggiornamenti correttivi per i pacchetti 4.15.5, 4.14.12 e 4.13.17 che risolvono 3 vulnerabilit\u00e0. La vulnerabilit\u00e0 pi\u00f9 pericolosa (CVE-2021-44142) consente a un attaccante remoto di eseguire codice arbitrario con diritti di root su un sistema con una versione vulnerabile di Samba. Il problema ha un livello di pericolo di 9.9 su 10.    <\/p>\n<p>La vulnerabilit\u00e0 si manifesta solo quando si utilizza il modulo VFS vfs_fruit con le impostazioni predefinite (fruit:metadata=netatalk o fruit:resource=file), che fornisce un ulteriore livello di compatibilit\u00e0 con i client mac OS e migliora la portabilit\u00e0 dei file. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/it\/server\/dts-dusseldorf\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3448\">server<\/a> Netatalk 3 AFP. Il problema \u00e8 causato da un overflow del buffer nel codice di parsing dei metadati con attributi estesi (EA, xattr), invocato durante l'apertura di file in smbd. Per effettuare l'attacco, l'utente deve avere accesso in scrittura agli attributi estesi del file, e l'attacco pu\u00f2 essere condotto anche da un utente guest, se gli \u00e8 consentita tale scrittura.          <\/p>\n<p>\u00c8 possibile seguire il rilascio degli aggiornamenti dei pacchetti nelle distribuzioni sulle seguenti pagine: Debian, Ubuntu, RHEL, SUSE, Fedora, Arch, FreeBSD. Come soluzione alternativa per la protezione, \u00e8 possibile rimuovere il modulo &#171;fruit&#187; dalla lista &#171;vfs objects&#187; in smb.conf.      <\/p>\n<p>Le altre due vulnerabilit\u00e0:  <\/p>\n<ul>\n<li class=\"l\"> La vulnerabilit\u00e0 CVE-2022-0336 consente a un utente Samba AD DC di impersonare un altro servizio e intercettare il traffico destinato a quel servizio. Per effettuare l'attacco, l'utente deve avere il diritto di modificare l'attributo servicePrincipalName nell'account.\n<li class=\"l\"> La vulnerabilit\u00e0 CVE-2021-44141 pu\u00f2 portare a una fuga di informazioni sull'esistenza di file e directory nell'area FS al di fuori della partizione esportata di Samba. L'attacco avviene manipolando i collegamenti simbolici.  <\/ul>\n<p>Fonte: <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 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" 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