{"id":99255,"date":"2021-02-24T16:22:40","date_gmt":"2021-02-24T14:22:40","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimosti-vo-freebsd-pozvolyayushhie-obojti-ogranicheniya-jail-okruzhenij"},"modified":"2021-02-24T16:22:40","modified_gmt":"2021-02-24T14:22:40","slug":"uyazvimosti-vo-freebsd-pozvolyayushhie-obojti-ogranicheniya-jail-okruzhenij","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/uyazvimosti-vo-freebsd-pozvolyayushhie-obojti-ogranicheniya-jail-okruzhenij","title":{"rendered":"Vulnerabilit\u00e0 in FreeBSD che consentono di eludere le restrizioni degli ambienti jail","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Nel sistema di ambienti isolati jail sviluppato dal progetto FreeBSD sono state identificate due vulnerabilit\u00e0:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2020-25582 \u2014 vulnerabilit\u00e0 nell'implementazione della chiamata di sistema jail_attach, destinata ad allegare processi esterni a ambienti jail esistenti. Il problema si manifesta durante la chiamata jail_attach attraverso i comandi jexec o killall, e consente a un processo privilegiato, isolato all'interno del jail, di modificare la propria directory radice e ottenere accesso completo a tutti i file e le directory del sistema.\n<li class=\"l\"> CVE-2020-25581 \u2014 condizione di gara nella rimozione dei processi tramite la chiamata di sistema jail_remove, consente a un processo privilegiato in esecuzione all'interno del jail di evitare la rimozione al termine del jail e di ottenere accesso completo al sistema tramite devfs nel successivo avvio del jail con la stessa directory radice, approfittando del momento in cui devfs \u00e8 gi\u00e0 montato per il jail, ma le regole di isolamento non sono ancora state applicate.    <\/ul>\n<p>Si segnala inoltre una vulnerabilit\u00e0 (CVE-2020-25580) nel modulo PAM pam_login_access, responsabile della gestione del file login_access, in cui sono definite le regole di accesso per utenti e gruppi applicate all'accesso al sistema (per impostazione predefinita, l'accesso \u00e8 consentito tramite console, sshd e telnetd). La vulnerabilit\u00e0 consente di aggirare le restrizioni di login_access e di effettuare accesso nonostante la presenza di regole di divieto.    <\/p>\n<p>Le vulnerabilit\u00e0 sono state corrette nelle versioni 13.0-STABLE, 12.2-STABLE e 11.4-STABLE, cos\u00ec come negli aggiornamenti correttivi FreeBSD 12.2-RELEASE-p4 e 11.4-RELEASE-p8.<br \/>\n<br \/>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=54642\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u043c\u043e\u0439 \u043f\u0440\u043e\u0435\u043a\u0442\u043e\u043c FreeBSD \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u0438\u0437\u043e\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u0439 jail \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u044b \u0434\u0432\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438: CVE-2020-25582 &#8212; \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u043e\u0433\u043e \u0432\u044b\u0437\u043e\u0432\u0430 jail_attach, \u043f\u0440\u0435\u0434\u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u043d\u043e\u0433\u043e \u0434\u043b\u044f \u043f\u0440\u0438\u043a\u0440\u0435\u043f\u043b\u0435\u043d\u0438\u044f \u0432\u043d\u0435\u0448\u043d\u0438\u0445 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0432 \u043a \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u043c jail-\u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u044f\u043c. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0432\u043e \u0432\u0440\u0435\u043c\u044f \u0432\u044b\u0437\u043e\u0432\u0430 jail_attach \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 \u043a\u043e\u043c\u0430\u043d\u0434 jexec \u0438\u043b\u0438 killall, \u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u043c\u0443 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0443, \u0438\u0437\u043e\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u043c\u0443 \u0432\u043d\u0443\u0442\u0440\u0438 jail, \u0438\u0437\u043c\u0435\u043d\u0438\u0442\u044c \u0441\u0432\u043e\u0439 \u043a\u043e\u0440\u043d\u0435\u0432\u043e\u0439 \u043a\u0430\u0442\u0430\u043b\u043e\u0433 \u0438 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u043f\u043e\u043b\u043d\u044b\u0439 \u0434\u043e\u0441\u0442\u0443\u043f \u043a\u043e [&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-99255","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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vulnerabilit\u00e0 nell'implementazione della chiamata di sistema jail_attach, destinata a collegare.","canonical_url":"https:\/\/prohoster.info\/it\/blog\/news\/uyazvimosti-vo-freebsd-pozvolyayushhie-obojti-ogranicheniya-jail-okruzhenij","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"it_IT","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\u0438 \u0432\u043e FreeBSD, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0435 \u043e\u0431\u043e\u0439\u0442\u0438 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u044f jail-\u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u0439 | ProHoster","og:description":"\u0412 \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u043c\u043e\u0439 \u043f\u0440\u043e\u0435\u043a\u0442\u043e\u043c FreeBSD \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u0438\u0437\u043e\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u0439 jail \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u044b \u0434\u0432\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438: CVE-2020-25582 - 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