{"id":94397,"date":"2020-09-16T13:42:09","date_gmt":"2020-09-16T11:42:09","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-ftpd-iz-freebsd-pozvolyavshaya-poluchit-root-dostup-pri-ispolzovanii-ftpchroot"},"modified":"2020-09-16T13:42:09","modified_gmt":"2020-09-16T11:42:09","slug":"uyazvimost-v-ftpd-iz-freebsd-pozvolyavshaya-poluchit-root-dostup-pri-ispolzovanii-ftpchroot","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sv\/blog\/news\/uyazvimost-v-ftpd-iz-freebsd-pozvolyavshaya-poluchit-root-dostup-pri-ispolzovanii-ftpchroot","title":{"rendered":"S\u00e5rbarhet i ftpd fr\u00e5n FreeBSD som gjorde det m\u00f6jligt att f\u00e5 root-\u00e5tkomst vid anv\u00e4ndning av ftpchroot","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Den medf\u00f6ljande ftpd-servern i FreeBSD <noindex><a rel=\"nofollow\" href=\"https:\/\/www.mail-archive.com\/freebsd-announce@freebsd.org\/msg00994.html\">uppt\u00e4cktes<\/a><\/noindex> en kritisk s\u00e5rbarhet (CVE-2020-7468) som ger anv\u00e4ndare, som \u00e4r begr\u00e4nsade till sin hemkatalog med hj\u00e4lp av ftpchroot-alternativet, full root-\u00e5tkomst till systemet. <\/p>\n<p>Problemet orsakas av en kombination av en felaktighet i implementeringen av mekanismen f\u00f6r anv\u00e4ndarisolering via chroot-anrop (vid fel i bytet av uid eller utf\u00f6rande av chroot och chdir uppstod en icke-kritisk felaktighet som inte br\u00f6t anslutningen) och att den autentiserade FTP-anv\u00e4ndaren ges tillr\u00e4ckliga r\u00e4ttigheter f\u00f6r att kringg\u00e5 den rotv\u00e4gen i filsystemet. S\u00e5rbarheten uppst\u00e5r inte vid \u00e5tkomst till FTP-servern i anonymt l\u00e4ge eller vid fullst\u00e4ndigt anv\u00e4ndarinloggning utan ftpchroot. Problemet har \u00e5tg\u00e4rdats i uppdateringar 12.1-RELEASE-p10, 11.4-RELEASE-p4 och 11.3-RELEASE-p14.<\/p>\n<p>Det b\u00f6r ocks\u00e5 noteras att ytterligare tre s\u00e5rbarheter har \u00e5tg\u00e4rdats i 12.1-RELEASE-p10, 11.4-RELEASE-p4 och 11.3-RELEASE-p14:<\/p>\n<ul>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.mail-archive.com\/freebsd-announce@freebsd.org\/msg00992.html\">CVE-2020-7467<\/a><\/noindex> \u2014 en s\u00e5rbarhet i hypervisor Bhyve som g\u00f6r det m\u00f6jligt f\u00f6r ett g\u00e4stsystem att skriva information i v\u00e4rdsystemets minnesomr\u00e5den och f\u00e5 fullst\u00e4ndig \u00e5tkomst till v\u00e4rdsystemet. Problemet orsakas av bristen p\u00e5 \u00e5tkomstbegr\u00e4nsningar till processorinstruktioner som arbetar med v\u00e4rdens fysiska adresser och visar sig endast p\u00e5 system med AMD CPU.\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.mail-archive.com\/freebsd-announce@freebsd.org\/msg00993.html\">CVE-2020-24718<\/a><\/noindex> \u2014 en s\u00e5rbarhet i hypervisor Bhyve som g\u00f6r det m\u00f6jligt f\u00f6r en angripare med root-r\u00e4ttigheter inom isolerade milj\u00f6er skapade med Bhyve att k\u00f6ra kod p\u00e5 k\u00e4rnniv\u00e5. Problemet orsakas av bristen p\u00e5 ordentliga \u00e5tkomstbegr\u00e4nsningar till VMCS-strukturer (Virtual Machine Control Structure) p\u00e5 system med Intel CPU och VMCB (Virtual Machine Control Block).<br \/>\nCVE-2020-7464<\/p>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.mail-archive.com\/freebsd-announce@freebsd.org\/msg00991.html\">\u2014 en s\u00e5rbarhet i drivrutinen ure (USB Ethernet Realtek RTL8152 och RTL8153) som m\u00f6jligg\u00f6r spoofing av paket fr\u00e5n andra v\u00e4rdar eller ins\u00e4ttning av paket i andra VLAN genom att skicka stora ramverk (st\u00f6rre \u00e4n 2048).<\/a><\/noindex> \u2014 en s\u00e5rbarhet i drivrutinen ure (USB Ethernet Realtek RTL8152 och RTL8153) som g\u00f6r det m\u00f6jligt att genom att skicka stora ramar (st\u00f6rre \u00e4n 2048) utf\u00f6ra paketst\u00f6ld fr\u00e5n andra v\u00e4rdar eller utf\u00f6ra paketinjektion i andra VLAN.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>K\u00e4lla: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=53720\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u043f\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u043c\u043e\u043c \u0432 \u0441\u043e\u0441\u0442\u0430\u0432\u0435 FreeBSD \u0441\u0435\u0440\u0432\u0435\u0440\u0435 ftpd \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-2020-7468), \u0434\u0430\u044e\u0449\u0430\u044f \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f\u043c, \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u043d\u044b\u043c \u0441\u0432\u043e\u0438\u043c \u0434\u043e\u043c\u0430\u0448\u043d\u0438\u043c \u043a\u0430\u0442\u0430\u043b\u043e\u0433\u043e\u043c \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 \u043e\u043f\u0446\u0438\u0438 ftpchroot, \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u043f\u043e\u043b\u043d\u044b\u0439 root-\u0434\u043e\u0441\u0442\u0443\u043f \u043a \u0441\u0438\u0441\u0442\u0435\u043c\u0435. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u0441\u043e\u0447\u0435\u0442\u0430\u043d\u0438\u0435\u043c \u043e\u0448\u0438\u0431\u043a\u0438 \u0432 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u0430 \u0438\u0437\u043e\u043b\u044f\u0446\u0438\u0438 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 \u0432\u044b\u0437\u043e\u0432\u0430 chroot (\u043f\u0440\u0438 \u0441\u0431\u043e\u044f\u0445 \u0432 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0435 \u0441\u043c\u0435\u043d\u044b uid \u0438\u043b\u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f chroot \u0438 chdir \u0432\u044b\u0434\u0430\u0432\u0430\u043b\u0430\u0441\u044c \u043d\u0435\u0444\u0430\u0442\u0430\u043b\u044c\u043d\u0430\u044f \u043e\u0448\u0438\u0431\u043a\u0430, \u043d\u0435 [&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-94397","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412 \u043f\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u043c\u043e\u043c \u0432 \u0441\u043e\u0441\u0442\u0430\u0432\u0435 FreeBSD \u0441\u0435\u0440\u0432\u0435\u0440\u0435 ftpd \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-2020-7468).\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/sv\/blog\/news\/uyazvimost-v-ftpd-iz-freebsd-pozvolyavshaya-poluchit-root-dostup-pri-ispolzovanii-ftpchroot\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.4\" \/>\n\t\t<meta property=\"og:locale\" content=\"sv_SE\" \/>\n\t\t<meta property=\"og:site_name\" content=\"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\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\ud83e\udd47\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 ftpd \u0438\u0437 FreeBSD, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0432\u0448\u0430\u044f \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c root-\u0434\u043e\u0441\u0442\u0443\u043f \u043f\u0440\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 ftpchroot | ProHoster\" \/>\n\t\t<meta property=\"og:description\" content=\"\u0412 \u043f\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u043c\u043e\u043c \u0432 \u0441\u043e\u0441\u0442\u0430\u0432\u0435 FreeBSD \u0441\u0435\u0440\u0432\u0435\u0440\u0435 ftpd \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-2020-7468).\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/prohoster.info\/sv\/blog\/news\/uyazvimost-v-ftpd-iz-freebsd-pozvolyavshaya-poluchit-root-dostup-pri-ispolzovanii-ftpchroot\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:width\" content=\"350\" \/>\n\t\t<meta property=\"og:image:height\" content=\"350\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2020-09-16T11:42:09+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2020-09-16T11:42:09+00:00\" \/>\n\t\t<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"\ud83e\udd47S\u00e5rbarhet i ftpd fr\u00e5n FreeBSD som gjorde det m\u00f6jligt att f\u00e5 root-\u00e5tkomst vid anv\u00e4ndning av ftpchroot | ProHoster","description":"\ud83e\udd47S\u00e5rbarhet i ftpd fr\u00e5n FreeBSD som gjorde det m\u00f6jligt att f\u00e5 root-\u00e5tkomst vid anv\u00e4ndning av ftpchroot | ProHoster","canonical_url":"https:\/\/prohoster.info\/sv\/blog\/news\/uyazvimost-v-ftpd-iz-freebsd-pozvolyavshaya-poluchit-root-dostup-pri-ispolzovanii-ftpchroot","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\u044c \u0432 ftpd \u0438\u0437 FreeBSD, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0432\u0448\u0430\u044f \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c root-\u0434\u043e\u0441\u0442\u0443\u043f \u043f\u0440\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 ftpchroot | ProHoster","og:description":"\u0412 \u043f\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u043c\u043e\u043c \u0432 \u0441\u043e\u0441\u0442\u0430\u0432\u0435 FreeBSD \u0441\u0435\u0440\u0432\u0435\u0440\u0435 ftpd \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-2020-7468).","og:url":"https:\/\/prohoster.info\/sv\/blog\/news\/uyazvimost-v-ftpd-iz-freebsd-pozvolyavshaya-poluchit-root-dostup-pri-ispolzovanii-ftpchroot","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2020-09-16T11:42:09+00:00","article:modified_time":"2020-09-16T11:42:09+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"94397","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":null,"schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"seo_analyzer_scan_date":null,"breadcrumb_settings":null,"limit_modified_date":false,"reviewed_by":null,"ai":null,"created":"2021-02-28 11:27:34","updated":"2022-10-02 08:32:22","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/posts\/94397","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/comments?post=94397"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/posts\/94397\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/media?parent=94397"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/categories?post=94397"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/tags?post=94397"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}