{"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\/sv\/blog\/news\/uyazvimosti-vo-freebsd-pozvolyayushhie-obojti-ogranicheniya-jail-okruzhenij","title":{"rendered":"S\u00e5rbarheter i FreeBSD som g\u00f6r det m\u00f6jligt att kringg\u00e5 begr\u00e4nsningar i jail-milj\u00f6er","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>I det p\u00e5g\u00e5ende projektet FreeBSD f\u00f6r isolerade jail-milj\u00f6er har tv\u00e5 s\u00e5rbarheter identifierats:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2020-25582 \u2014 en s\u00e5rbarhet i implementationen av systemanropet jail_attach, som \u00e4r avsett f\u00f6r att bifoga externa processer till befintliga jail-milj\u00f6er. Problemet uppst\u00e5r under anropet jail_attach med hj\u00e4lp av kommandon som jexec eller killall, och till\u00e5ter en privilegierad process, som \u00e4r isolerad inom jail, att \u00e4ndra sin rotkatalog och f\u00e5 full tillg\u00e5ng till alla filer och kataloger i systemet.\n<li class=\"l\"> CVE-2020-25581 \u2014 en t\u00e4vlingsf\u00f6rh\u00e5llande vid borttagning av processer med hj\u00e4lp av systemanropet jail_remove, som g\u00f6r att en privilegierad process som k\u00f6rs inom jail kan undvika borttagning n\u00e4r jail avslutas och f\u00e5 full tillg\u00e5ng till systemet via devfs n\u00e4r jail startas igen med samma rotkatalog, genom att utnyttja \u00f6gonblicket n\u00e4r devfs redan \u00e4r monterad f\u00f6r jail men isoleringsreglerna \u00e4nnu inte har till\u00e4mpats.    <\/ul>\n<p>Ytterligare kan en s\u00e5rbarhet noteras (CVE-2020-25580) i PAM-modulen pam_login_access, som hanterar filen login_access, d\u00e4r regler f\u00f6r anv\u00e4ndar- och grupp\u00e5tkomst definieras och till\u00e4mpas vid inloggning (som standard till\u00e5ts inloggning via konsol, sshd och telnetd). S\u00e5rbarheten g\u00f6r det m\u00f6jligt att kringg\u00e5 begr\u00e4nsningarna i login_access och logga in, trots existerande f\u00f6rbud.    <\/p>\n<p>S\u00e5rbarheterna har \u00e5tg\u00e4rdats i versionerna 13.0-STABLE, 12.2-STABLE och 11.4-STABLE, samt i korrigeringsuppdateringarna FreeBSD 12.2-RELEASE-p4 och 11.4-RELEASE-p8.<br \/>\n<br \/>K\u00e4lla: <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 5.0.4 - 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en s\u00e5rbarhet i implementeringen av systemanropet jail_attach, som syftar till att koppla.","canonical_url":"https:\/\/prohoster.info\/sv\/blog\/news\/uyazvimosti-vo-freebsd-pozvolyayushhie-obojti-ogranicheniya-jail-okruzhenij","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"sv_SE","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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