Kijav\u00edt\u00f3 kiad\u00e1sok k\u00e9sz\u00fcltek a Samba 4.14.4, 4.13.8 \u00e9s 4.12.15 csomaghoz a (CVE-2021-20254) s\u00e9r\u00fcl\u00e9kenys\u00e9g megsz\u00fcntet\u00e9s\u00e9re, amely a legt\u00f6bb esetben a smbd folyamat \u00f6sszeoml\u00e1s\u00e1hoz vezethet, de a legrosszabb forgat\u00f3k\u00f6nyv szerint nem z\u00e1rhat\u00f3 ki a jogosulatlan f\u00e1jlhozz\u00e1f\u00e9r\u00e9s \u00e9s a nem privilegiz\u00e1lt felhaszn\u00e1l\u00f3 \u00e1ltal a h\u00e1l\u00f3zati megoszt\u00e1son tal\u00e1lhat\u00f3 f\u00e1jlok t\u00f6rl\u00e9se. <\/p>\n
A s\u00e9r\u00fcl\u00e9kenys\u00e9g egy sids_to_unixids() f\u00fcggv\u00e9nyben l\u00e9v\u0151 hib\u00e1b\u00f3l ered, amely a SID (Windows Security Identifier) azonos\u00edt\u00f3k GID (Unix Group ID) form\u00e1tumra t\u00f6rt\u00e9n\u0151 \u00e1tkonvert\u00e1l\u00e1sakor a pufferen k\u00edv\u00fcli adatok olvas\u00e1s\u00e1hoz vezet. A probl\u00e9ma akkor jelentkezik, amikor egy negat\u00edv elem ker\u00fcl az SID-GID p\u00e1ros\u00edt\u00e1si cache-be. A Samba fejleszt\u0151i nem tudt\u00e1k azonos\u00edtani megb\u00edzhat\u00f3 \u00e9s reproduk\u00e1lhat\u00f3 k\u00f6r\u00fclm\u00e9nyeket a s\u00e9r\u00fcl\u00e9kenys\u00e9g megjelen\u00e9s\u00e9re, de a s\u00e9r\u00fcl\u00e9kenys\u00e9get felfedez\u0151 kutat\u00f3 \u00fagy v\u00e9li, hogy a probl\u00e9ma kiakn\u00e1zhat\u00f3 f\u00e1jlok t\u00f6rl\u00e9s\u00e9re a f\u00e1jlrendszeren. szerveren<\/a> a sz\u00fcks\u00e9ges jogosults\u00e1gok n\u00e9lk\u00fcl ahhoz, hogy ezt a m\u0171veletet v\u00e9grehajts\u00e1k. \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\udd47\u00daj verzi\u00f3k a Samba 4.14.4, 4.13.8 \u00e9s 4.12.15 a s\u00e9r\u00fcl\u00e9kenys\u00e9g kijav\u00edt\u00e1s\u00e1val | ProHoster","description":"Kijav\u00edt\u00f3 kiad\u00e1sok k\u00e9sz\u00fcltek a Samba 4.14.4, 4.13.8 \u00e9s 4.12.15 csomaghoz a (CVE-2021-20254) s\u00e9r\u00fcl\u00e9kenys\u00e9g megsz\u00fcntet\u00e9s\u00e9re, amely a legt\u00f6bb esetben a smbd folyamat \u00f6sszeoml\u00e1s\u00e1hoz vezethet, de a legrosszabb forgat\u00f3k\u00f6nyv szerint nem.","canonical_url":"https:\/\/prohoster.info\/hu\/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":"hu_HU","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 | 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Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"