{"id":94510,"date":"2020-09-18T01:41:56","date_gmt":"2020-09-17T23:41:56","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/realizacziya-kontrollera-domena-v-samba-okazalas-podverzhena-uyazvimosti-zerologin"},"modified":"2020-09-18T01:41:56","modified_gmt":"2020-09-17T23:41:56","slug":"realizacziya-kontrollera-domena-v-samba-okazalas-podverzhena-uyazvimosti-zerologin","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/realizacziya-kontrollera-domena-v-samba-okazalas-podverzhena-uyazvimosti-zerologin","title":{"rendered":"Domeeni kontrolleri rakendamine Sambas osutus ZeroLogin haavatavusele vastuv\u00f5tlikuks.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Samba projekti arendajad hoiatas<\/a><\/noindex> kasutajad, kes hiljuti tuvastatud<\/a><\/noindex> Windowsis haavatavus ZeroLogin (CVE-2020-1472<\/a><\/noindex>) n\u00e4itab ennast<\/a><\/noindex> ja Samba-p\u00f5hise domeeni kontrolleri rakenduses. Haavatavus p\u00f5hjustatud<\/a><\/noindex> on MS-NRPC protokolli ja AES-CFB8 kr\u00fcptoalgoritmi puudulikkustes ning selle edukal \u00e4rakasutamisel v\u00f5imaldab r\u00fcndajal saada administraatori juurdep\u00e4\u00e4su domeeni kontrollerile.<\/p>\n

Haavatavuse tuum seisneb selles, et MS-NRPC (Netlogon Remote Protocol) protokoll v\u00f5imaldab autentimisandmete edastamisel tagasi l\u00fclituda RPC-\u00fchenduse kasutamisele ilma kr\u00fcpteerimiseta. Selle tulemusena saab r\u00fcndaja kasutada AES-CFB8 algoritmi n\u00f5rkusi, et edastada tervikliku sisselogimise valeandmeid (spoofer). Keskmiselt vajalik administraatori \u00f5igustega sisselogimiseks on umbes 256 spooferi katset. R\u00fcnnaku l\u00e4biviimiseks ei ole vajalik kehtiv konto domeeni kontrolleris \u2014 spooferi katseid saab teha vale parooli kasutamise teel. NTLM-i autentimisprogramm suunatakse domeeni kontrollerisse, mis tagastab juurdep\u00e4\u00e4su keeldumise, kuid r\u00fcndaja suudab selle vastuse valeandmete edastamisega \u00fcmber juhtida, mist\u00f5ttu r\u00fcnnaku objekt peab sisselogimist edukaks.<\/p>\n

Samba puhul ilmneb haavatavus ainult s\u00fcsteemides, kus ei kasutata seadistust \u201eserver schannel = yes\u201d, mis on alates Samba 4.8 vaikimisi sisse l\u00fclitatud. Eelk\u00f5ige v\u00f5ivad olla ohustatud s\u00fcsteemid, mille seadistused on \u201eserver schannel = no\u201d ja \u201eserver schannel = auto\u201d, mis v\u00f5imaldavad Sambal kasutada samu n\u00f5rkusi AES-CFB8 algoritmis, nagu Windows. <\/p>\n

Windowsile ettevalmistatud standardiseeritud eksploid protot\u00fc\u00fcp<\/a><\/noindex>, Sambas aktiveerub ainult ServerAuthenticate3 v\u00e4ljakutse, samas kui ServerPasswordSet2 operatsioon l\u00f5ppeb t\u00f5rkega (eksploid vajab Samba jaoks kohandamist). Alternatiivsete eksploidide toimivuse kohta (1<\/a><\/noindex>, 2<\/a><\/noindex>, 3<\/a><\/noindex>, 4<\/a><\/noindex>) ei ole midagi teatatud. R\u00fcnnakute katseid s\u00fcsteemidele saab j\u00e4lgida, anal\u00fc\u00fcsides logides olemasolevaid kirjeid, mis mainivad ServerAuthenticate3 ja ServerPasswordSet.<\/p>\n

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

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

\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 Samba \u043f\u0440\u0435\u0434\u0443\u043f\u0440\u0435\u0434\u0438\u043b\u0438 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439, \u0447\u0442\u043e \u043d\u0435\u0434\u0430\u0432\u043d\u043e \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u043d\u0430\u044f \u0432 Windows \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c ZeroLogin (CVE-2020-1472) \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0438 \u0432 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u043b\u0435\u0440\u0430 \u0434\u043e\u043c\u0435\u043d\u0430 \u043d\u0430 \u0431\u0430\u0437\u0435 Samba. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u043d\u0435\u0434\u043e\u0440\u0430\u0431\u043e\u0442\u043a\u0430\u043c\u0438 \u0432 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0435 MS-NRPC \u0438 \u043a\u0440\u0438\u043f\u0442\u043e\u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c\u0435 AES-CFB8, \u0438 \u043f\u0440\u0438 \u0443\u0441\u043f\u0435\u0448\u043d\u043e\u0439 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0437\u043b\u043e\u0443\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0438\u043a\u0443 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u0434\u043e\u0441\u0442\u0443\u043f \u0430\u0434\u043c\u0438\u043d\u0438\u0441\u0442\u0440\u0430\u0442\u043e\u0440\u0430 \u0432 \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u043b\u0435\u0440\u0435 \u0434\u043e\u043c\u0435\u043d\u0430. \u0421\u0443\u0442\u044c \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 \u0442\u043e\u043c, \u0447\u0442\u043e \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b MS-NRPC (Netlogon Remote Protocol) \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043f\u0440\u0438 […]<\/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-94510","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"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\udd47Samba domeiniserveri rakendus osutus ZeroLogin haavatavusele | ProHoster","description":"Samba projekti arendajad on hoiatanud kasutajaid, et hiljuti avastatud Windowsi haavatavus ZeroLogin (CVE-2020-1472) ilmneb ka Samba-p\u00f5hise domeiniserveri rakenduses. Haavatavus tuleneb puuduj\u00e4\u00e4kidest MS-NRPC protokollis ja AES-CFB8 kr\u00fcptoalgoritmis ning selle edukas \u00e4rakasutamine v\u00f5imaldab r\u00fcndajal p\u00e4\u00e4seda administraatori \u00f5igustele domeiniserveris. Haavatavuse olemus seisneb selles, et MS-NRPC protokoll (Netlogon Remote Protocol) v\u00f5imaldab...","canonical_url":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/realizacziya-kontrollera-domena-v-samba-okazalas-podverzhena-uyazvimosti-zerologin","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"et_EE","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\u0420\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u043b\u0435\u0440\u0430 \u0434\u043e\u043c\u0435\u043d\u0430 \u0432 Samba \u043e\u043a\u0430\u0437\u0430\u043b\u0430\u0441\u044c \u043f\u043e\u0434\u0432\u0435\u0440\u0436\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 ZeroLogin | ProHoster","og:description":"\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 Samba \u043f\u0440\u0435\u0434\u0443\u043f\u0440\u0435\u0434\u0438\u043b\u0438 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439, \u0447\u0442\u043e \u043d\u0435\u0434\u0430\u0432\u043d\u043e \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u043d\u0430\u044f \u0432 Windows \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c ZeroLogin (CVE-2020-1472) \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0438 \u0432 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u043b\u0435\u0440\u0430 \u0434\u043e\u043c\u0435\u043d\u0430 \u043d\u0430 \u0431\u0430\u0437\u0435 Samba. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u043d\u0435\u0434\u043e\u0440\u0430\u0431\u043e\u0442\u043a\u0430\u043c\u0438 \u0432 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0435 MS-NRPC \u0438 \u043a\u0440\u0438\u043f\u0442\u043e\u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c\u0435 AES-CFB8, \u0438 \u043f\u0440\u0438 \u0443\u0441\u043f\u0435\u0448\u043d\u043e\u0439 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0437\u043b\u043e\u0443\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0438\u043a\u0443 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u0434\u043e\u0441\u0442\u0443\u043f \u0430\u0434\u043c\u0438\u043d\u0438\u0441\u0442\u0440\u0430\u0442\u043e\u0440\u0430 \u0432 \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u043b\u0435\u0440\u0435 \u0434\u043e\u043c\u0435\u043d\u0430. \u0421\u0443\u0442\u044c \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 \u0442\u043e\u043c, \u0447\u0442\u043e \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b MS-NRPC (Netlogon Remote Protocol) \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043f\u0440\u0438","og:url":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/realizacziya-kontrollera-domena-v-samba-okazalas-podverzhena-uyazvimosti-zerologin","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":"2020-09-17T23:41:56+00:00","article:modified_time":"2020-09-17T23:41:56+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"94510","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 11:25:23","updated":"2022-09-29 04:02:07"},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/posts\/94510","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/comments?post=94510"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/posts\/94510\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/media?parent=94510"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/categories?post=94510"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/tags?post=94510"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}