{"id":92546,"date":"2020-08-28T07:42:57","date_gmt":"2020-08-28T05:42:57","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-openzfs-narushayushhaya-obrabotku-prav-dostupa-vo-freebsd"},"modified":"2020-08-28T07:42:57","modified_gmt":"2020-08-28T05:42:57","slug":"uyazvimost-v-openzfs-narushayushhaya-obrabotku-prav-dostupa-vo-freebsd","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/uyazvimost-v-openzfs-narushayushhaya-obrabotku-prav-dostupa-vo-freebsd","title":{"rendered":"OpenZFS-i haavatavus, mis rikub \u00f5iguste t\u00f6\u00f6tlemist FreeBSD-s.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

V lisatud<\/a><\/noindex> \u00fches OpenZFS<\/a><\/noindex> koodis, mis toetab FreeBSD operatsioonis\u00fcsteemi, tuvastati kriitiline haavatavus<\/a><\/noindex> (CVE-2020-24717<\/a><\/noindex>), mis p\u00f5hjustab juurdep\u00e4\u00e4su\u00f5iguste t\u00f6\u00f6tlemise rikkumise. Probleemi tuum on see, et grupi jaoks seadistatud \u00f5igused t\u00f6\u00f6tlesid \u00f5igusi nagu faili omanikule. Probleem eemaldatud<\/a><\/noindex> uuenduses OpenZFS 2.0.0-rc1<\/a><\/noindex>. Parandus on sisse viidud<\/a><\/noindex> kuni t\u00f5lget<\/a><\/noindex> FreeBSD HEAD koodibaasis OpenZFS.<\/p>\n

Probleemi p\u00f5hjustas see, et k\u00f5ik juurdep\u00e4\u00e4su juhtnime elemendid (ACE), mis on seadistatud grupi omanikule (group@) ja tavap\u00e4rased grupid (group:), delegeeriti praegusele kasutajale.
\nN\u00e4iteks juurdep\u00e4\u00e4su re\u017eiim 0770 (kirjutamine lubatud ainult grupi liikmetele) t\u00f6\u00f6tles \u00f5igusi nagu 0777 (kirjutamine lubatud k\u00f5igile kasutajatele). Sarnane olukord esines ka ACL-ide puhul, n\u00e4iteks allpool toodud ACL muutus ekvivalentseks \u00f5igustega 0777, kuna grupi liikme kontroll builtin_administrators jaoks tagastab True.<\/p>\n

# owner: root
\n # group: wheel
\n group:builtin_administrators:rwxpDdaARWcCos:——-:allow<\/p>\n

Samuti tuvastati OpenZFS porti FreeBSD jaoks veel \u00fcks probleem, mis puudutab \u00f5iguste andmist katalooge sisenemiseks (cd), s\u00f5ltumata kataloogide t\u00e4itmis\u00f5iguse lipu olekust. Katalooge sai samas siseneda isegi juhul, kui ACLiga oli selgelt keeldutud («deny — execute») <\/p>\n

<\/a><\/noindex><\/p>\n

Allikas: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u043d\u043e\u043c \u0432 OpenZFS \u043a\u043e\u0434\u0435 \u0434\u043b\u044f \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438 \u041e\u0421 FreeBSD \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2020-24717), \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0430\u044f \u043a \u043d\u0430\u0440\u0443\u0448\u0435\u043d\u0438\u044e \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043f\u0440\u0430\u0432 \u0434\u043e\u0441\u0442\u0443\u043f\u0430. \u0421\u0443\u0442\u044c \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u0432 \u0442\u043e\u043c, \u0447\u0442\u043e \u043f\u0440\u0430\u0432\u0430, \u0443\u0441\u0442\u0430\u043d\u0430\u0432\u043b\u0438\u0432\u0430\u0435\u043c\u044b\u0435 \u0434\u043b\u044f \u0433\u0440\u0443\u043f\u043f\u044b, \u043e\u0431\u0440\u0430\u0431\u0430\u0442\u044b\u0432\u0430\u043b\u0438\u0441\u044c \u043a\u0430\u043a \u043f\u0440\u0430\u0432\u0430 \u0434\u043b\u044f \u0432\u043b\u0430\u0434\u0435\u043b\u044c\u0446\u0430 \u0444\u0430\u0439\u043b\u0430. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0432 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0438 OpenZFS 2.0.0-rc1. \u0418\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u0432\u043d\u0435\u0441\u0435\u043d\u043e \u0434\u043e \u043f\u0435\u0440\u0435\u0432\u043e\u0434\u0430 \u043a\u043e\u0434\u043e\u0432\u043e\u0439 \u0431\u0430\u0437\u044b FreeBSD HEAD \u043d\u0430 OpenZFS. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0431\u044b\u043b\u0430 \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u0442\u0435\u043c, \u0447\u0442\u043e […]<\/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-92546","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47OpenZFS-i haavatavus, mis rikub juurdep\u00e4\u00e4sukohtade t\u00f6\u00f6tlemist FreeBSD-s | ProHoster","description":"Lisatud OpenZFS koodis.","canonical_url":"https:\/\/prohoster.info\/et\/blog\/news\/uyazvimost-v-openzfs-narushayushhaya-obrabotku-prav-dostupa-vo-freebsd","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"et_EE","og:site_name":"ProHoster | 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