Byly p\u0159ipraveny opravn\u00e9 verze bal\u00ed\u010dku Samba 4.14.4, 4.13.8 a 4.12.15 s odstran\u011bn\u00edm zranitelnosti (CVE-2021-20254), kter\u00e1 v v\u011bt\u0161in\u011b p\u0159\u00edpad\u016f m\u016f\u017ee v\u00e9st k p\u00e1du procesu smbd, ale v nejhor\u0161\u00edm sc\u00e9n\u00e1\u0159i nelze vylou\u010dit mo\u017enost neopr\u00e1vn\u011bn\u00e9ho p\u0159\u00edstupu k soubor\u016fm a odstran\u011bn\u00ed soubor\u016f na s\u00ed\u0165ov\u00e9m disku nepr\u00e1vem opr\u00e1vn\u011bn\u00fdm u\u017eivatelem. <\/p>\n
Zranitelnost je zp\u016fsobena chybou ve funkci sids_to_unixids(), kter\u00e1 vede ke \u010dten\u00ed dat z oblasti mimo buffer p\u0159i p\u0159evodu identifik\u00e1tor\u016f skupin SID (Windows Security Identifier) na GID (Unix Group ID). Probl\u00e9m se objevuje p\u0159i p\u0159id\u00e1n\u00ed z\u00e1porn\u00e9ho prvku do cache pro p\u0159i\u0159azen\u00ed SID na GID. V\u00fdvoj\u00e1\u0159i Samba se nepoda\u0159ilo identifikovat spolehliv\u00e9 a opakovateln\u00e9 podm\u00ednky pro projeven\u00ed zranitelnosti, ale v\u00fdzkumn\u00edk, kter\u00fd zranitelnost objevil, se domn\u00edv\u00e1, \u017ee tento probl\u00e9m m\u016f\u017ee b\u00fdt vyu\u017eit k odstran\u011bn\u00ed soubor\u016f na disku. serveru<\/a> bez pot\u0159ebn\u00fdch opr\u00e1vn\u011bn\u00ed k proveden\u00ed t\u00e9to operace. \u041f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043b\u0435\u043d\u044b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 \u043f\u0430\u043a\u0435\u0442\u0430 Samba 4.14.4, 4.13.8 \u0438 4.12.15 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (CVE-2021-20254), \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0432 \u0431\u043e\u043b\u044c\u0448\u0438\u043d\u0441\u0442\u0432\u0435 \u0441\u043b\u0443\u0447\u0430\u0435\u0432 \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u043a\u0440\u0430\u0445\u0443 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0430 smbd, \u043d\u043e \u0432 \u043d\u0430\u0438\u0445\u0443\u0434\u0448\u0435\u043c \u0441\u0446\u0435\u043d\u0430\u0440\u0438\u0438 \u043d\u0435 \u0438\u0441\u043a\u043b\u044e\u0447\u0430\u0435\u0442\u0441\u044f \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u043d\u0435\u0430\u0432\u0442\u043e\u0440\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043a \u0444\u0430\u0439\u043b\u0430\u043c \u0438 \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u044f \u043d\u0435\u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u043c \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u043c \u0444\u0430\u0439\u043b\u043e\u0432 \u043d\u0430 \u0441\u0435\u0442\u0435\u0432\u043e\u043c \u0440\u0430\u0437\u0434\u0435\u043b\u0435. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u043e\u0448\u0438\u0431\u043a\u043e\u0439 \u0432 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 sids_to_unixids(), \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0435\u0439 \u043a \u0447\u0442\u0435\u043d\u0438\u044e \u0434\u0430\u043d\u043d\u044b\u0445 \u0438\u0437 \u043e\u0431\u043b\u0430\u0441\u0442\u0438 \u0437\u0430 […]<\/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-100060","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\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\udd47Nov\u00e9 verze Samba 4.14.4, 4.13.8 a 4.12.15 s odstran\u011bn\u00edm zranitelnosti | ProHoster","description":"Byly p\u0159ipraveny opravn\u00e9 verze bal\u00ed\u010dku Samba 4.14.4, 4.13.8 a 4.12.15 s odstran\u011bn\u00edm zranitelnosti (CVE-2021-20254), kter\u00e1 v v\u011bt\u0161in\u011b p\u0159\u00edpad\u016f m\u016f\u017ee v\u00e9st k p\u00e1du procesu smbd, ale v nejhor\u0161\u00edm sc\u00e9n\u00e1\u0159i ne.","canonical_url":"https:\/\/prohoster.info\/cs\/blog\/news\/novye-versii-samba-4-14-4-4-13-8-i-4-12-15-s-ustraneniem-uyazvimosti","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"cs_CZ","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\u041d\u043e\u0432\u044b\u0435 \u0432\u0435\u0440\u0441\u0438\u0438 Samba 4.14.4, 4.13.8 \u0438 4.12.15 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 | ProHoster","og:description":"\u041f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043b\u0435\u043d\u044b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 \u043f\u0430\u043a\u0435\u0442\u0430 Samba 4.14.4, 4.13.8 \u0438 4.12.15 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (CVE-2021-20254), \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0432 \u0431\u043e\u043b\u044c\u0448\u0438\u043d\u0441\u0442\u0432\u0435 \u0441\u043b\u0443\u0447\u0430\u0435\u0432 \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u043a\u0440\u0430\u0445\u0443 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0430 smbd, \u043d\u043e \u0432 \u043d\u0430\u0438\u0445\u0443\u0434\u0448\u0435\u043c \u0441\u0446\u0435\u043d\u0430\u0440\u0438\u0438 \u043d\u0435.","og:url":"https:\/\/prohoster.info\/cs\/blog\/news\/novye-versii-samba-4-14-4-4-13-8-i-4-12-15-s-ustraneniem-uyazvimosti","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":"2021-04-29T14:22:40+00:00","article:modified_time":"2021-04-29T14:22:40+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"100060","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":"2021-04-29 14:35:21","updated":"2026-02-09 21:38:10","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/100060","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/comments?post=100060"}],"version-history":[{"count":1,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/100060\/revisions"}],"predecessor-version":[{"id":159909,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/100060\/revisions\/159909"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/media?parent=100060"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/categories?post=100060"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/tags?post=100060"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"