A Microsoft \u00e1ltal kedden kiadott Windows oper\u00e1ci\u00f3s rendszer friss\u00edt\u00e9s\u00e9ben egy probl\u00e9ma mer\u00fclt fel, amely megakad\u00e1lyozza a Linux rendszerek bootol\u00e1s\u00e1t, amelyek ugyanazon a g\u00e9pen p\u00e1rhuzamosan vannak telep\u00edtve Windows-szal. A probl\u00e9m\u00e1t egy r\u00e9gi sebezhet\u0151s\u00e9g (CVE-2022-2601) kik\u00fcsz\u00f6b\u00f6l\u00e9s\u00e9re ir\u00e1nyul\u00f3 jav\u00edt\u00e1s okozza, amely a GRUB bootloaderben ker\u00fclt kijav\u00edt\u00e1sra 2022-ben. A Microsoft eddig nem adott ki hivatalos nyilatkozatot a felmer\u00fclt hib\u00e1val kapcsolatban, \u00e9s nem komment\u00e1lta azt. <\/p>\n
A m\u00f3dos\u00edt\u00e1s megjegyz\u00e9s\u00e9ben szerepelt, hogy a jav\u00edt\u00e1st, amely biztos\u00edtja az \u00faj SBAT politika (UEFI Secure Boot Advanced Targeting) alkalmaz\u00e1s\u00e1t, olyan rendszerekre fogj\u00e1k alkalmazni, ahol csak Windows m\u0171k\u00f6dik, \u00e9s nem \u00e9rinti a dupla boot konfigur\u00e1ci\u00f3kat (a m\u00f3dos\u00edt\u00e1s blokkolta a r\u00e9gi GRUB bootol\u00e1si k\u00e9pek haszn\u00e1lat\u00e1t a Secure Boot megker\u00fcl\u00e9s\u00e9re olyan rendszereken, ahol csak Windows van telep\u00edtve). Azt is jelezt\u00e9k, hogy ez a m\u00f3dos\u00edt\u00e1s probl\u00e9m\u00e1kat okozhat a r\u00e9gi rendszerek ISO k\u00e9peinek bootol\u00e1s\u00e1ban, amelyeket sebezhet\u0151 GRUB verzi\u00f3val sz\u00e1ll\u00edtottak. Val\u00f3j\u00e1ban a probl\u00e9m\u00e1k a dupla boot rendszereken is megjelentek, ahol \u00faj Linux disztrib\u00faci\u00f3kat haszn\u00e1lnak, mint az Ubuntu 24.04 \u00e9s a Debian 12.6, amelyekben a GRUB sebezhet\u0151s\u00e9ge m\u00e1r r\u00e9g\u00f3ta ki lett jav\u00edtva. <\/p>\n
A probl\u00e9ma a bet\u00f6lt\u00e9si folyamat le\u00e1ll\u00edt\u00e1sak\u00e9nt jelentkezik, a k\u00f6vetkez\u0151 hiba\u00fczenettel: \u201eVerifying shim SBAT data failed: Security Policy Violation. Something has gone seriously wrong: SBAT self-check failed: Security Policy Violation\u201d. A m\u0171k\u00f6d\u00e9s helyre\u00e1ll\u00edt\u00e1s\u00e1nak \u00e9rdek\u00e9ben javasolt elt\u00e1vol\u00edtani az UEFI-b\u0151l telep\u00edtett SBAT adatokat, amelyhez ki kell kapcsolni a Secure Boot-ot a firmware-ben, majd el kell ind\u00edtani egy friss UEFI Secure Boot-ot t\u00e1mogat\u00f3 Linux disztrib\u00faci\u00f3t, p\u00e9ld\u00e1ul az Ubuntut, \u00e9s a konzolban v\u00e9grehajtani a k\u00f6vetkez\u0151 parancsot: \u201emokutil \u2014set-sbat-policy delete\u201d. Ezt k\u00f6vet\u0151en \u00fajra kell ind\u00edtani a Linux disztrib\u00faci\u00f3t a megfelel\u0151 SBAT politika be\u00e1ll\u00edt\u00e1s\u00e1hoz. Ezut\u00e1n vissza lehet \u00e1ll\u00edtani a Secure Boot m\u00f3dot a firmware-ben. <\/p>\n
Az SBAT mechanizmust a Red Hat \u00e9s a Microsoft k\u00f6z\u00f6sen fejlesztette ki a GRUB bet\u00f6lt\u0151 \u00e9s a shim r\u00e9teg sebezhet\u0151s\u00e9geinek blokkol\u00e1s\u00e1ra, an\u00e9lk\u00fcl, hogy visszavont\u00e1k volna a digit\u00e1lis al\u00e1\u00edr\u00e1st. Az SBAT mag\u00e1ban foglalja a UEFI komponensek v\u00e9grehajthat\u00f3 f\u00e1jljaiba tov\u00e1bbi metaadatok hozz\u00e1ad\u00e1s\u00e1t, amelyek tartalmazz\u00e1k a gy\u00e1rt\u00f3, term\u00e9k, komponens \u00e9s verzi\u00f3 inform\u00e1ci\u00f3j\u00e1t. A megadott metaadatokat digit\u00e1lis al\u00e1\u00edr\u00e1s hiteles\u00edti, \u00e9s k\u00fcl\u00f6n list\u00e1kban szerepelhetnek enged\u00e9lyezett vagy tiltottt komponensek sz\u00e1m\u00e1ra a UEFI Secure Boot keretein bel\u00fcl. Az SBAT lehet\u0151v\u00e9 teszi a digit\u00e1lis al\u00e1\u00edr\u00e1s blokkol\u00e1s\u00e1t a komponensek egyedi verzi\u00f3sz\u00e1maihoz an\u00e9lk\u00fcl, hogy vissza kellene vonni a Secure Boot kulcsait. <\/p>\n
A sebezhet\u0151s\u00e9gek blokkol\u00e1sa az SBAT seg\u00edts\u00e9g\u00e9vel nem ig\u00e9nyli a visszavont UEFI tan\u00fas\u00edtv\u00e1nyok (dbx) list\u00e1j\u00e1nak haszn\u00e1lat\u00e1t, hanem a bels\u0151 kulcs helyettes\u00edt\u00e9se r\u00e9v\u00e9n t\u00f6rt\u00e9nik a GRUB2, shim \u00e9s m\u00e1s forgalmazott disztrib\u00faci\u00f3k ind\u00edt\u00f3 artefaktumaik al\u00e1\u00edr\u00e1s\u00e1nak \u00e9s friss\u00edt\u00e9s\u00e9nek l\u00e9trehoz\u00e1s\u00e1ra. Az SBAT bevezet\u00e9se el\u0151tt a visszavont tan\u00fas\u00edtv\u00e1nyok list\u00e1j\u00e1nak (dbx, UEFI Revocation List) friss\u00edt\u00e9se k\u00f6telez\u0151 felt\u00e9tele volt a sebezhet\u0151s\u00e9g teljes blokkol\u00e1s\u00e1nak, mivel a t\u00e1mad\u00f3, f\u00fcggetlen\u00fcl a haszn\u00e1lt oper\u00e1ci\u00f3s rendszert\u0151l, felhaszn\u00e1lhatta az UEFI Secure Boot kompromitt\u00e1l\u00e1s\u00e1ra egy r\u00e9gi, sebezhet\u0151 GRUB2 verzi\u00f3val al\u00e1\u00edrt ind\u00edt\u00f3 m\u00e9di\u00e1t. \u0412 \u0432\u044b\u043f\u0443\u0449\u0435\u043d\u043d\u043e\u043c \u0432\u043e \u0432\u0442\u043e\u0440\u043d\u0438\u043a \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0435\u0439 Microsoft \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0438 \u043a \u041e\u0421 Windows \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430, \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0430\u044f \u043a \u043d\u0435\u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0438 \u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0438 Linux-\u0441\u0438\u0441\u0442\u0435\u043c, \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u043d\u044b\u0445 \u043d\u0430 \u0442\u043e\u043c \u0436\u0435 \u043a\u043e\u043c\u043f\u044c\u044e\u0442\u0435\u0440\u0435 \u043f\u0430\u0440\u0430\u043b\u043b\u0435\u043b\u044c\u043d\u043e \u0441 Windows. \u041f\u0440\u0438\u0447\u0438\u043d\u043e\u0439 \u043f\u0440\u043e\u0431\u043b\u0435\u043c \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435, \u043d\u0430\u0446\u0435\u043b\u0435\u043d\u043d\u043e\u0435 \u043d\u0430 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435 \u0441\u0442\u0430\u0440\u043e\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (CVE-2022-2601) \u0432 \u0437\u0430\u0433\u0440\u0443\u0437\u0447\u0438\u043a\u0435 GRUB, \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u043d\u043e\u0439 \u0432 2022 \u0433\u043e\u0434\u0443. \u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Microsoft \u043f\u043e\u043a\u0430 \u043d\u0435 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b\u0430 \u0437\u0430\u044f\u0432\u043b\u0435\u043d\u0438\u044f, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u043e\u0433\u043e \u0441 \u0432\u043e\u0437\u043d\u0438\u043a\u0448\u0438\u043c \u0441\u0431\u043e\u0435\u043c \u0438 \u043d\u0438\u043a\u0430\u043a \u0435\u0433\u043e […]<\/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-119554","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\udd47A Windows friss\u00edt\u00e9s hib\u00e1ja blokkolta a Linux ind\u00edt\u00e1s\u00e1t UEFI Secure Boot haszn\u00e1latakor | ProHoster","description":"A Microsoft \u00e1ltal kedden kiadott Windows oper\u00e1ci\u00f3s rendszer friss\u00edt\u00e9s\u00e9ben egy probl\u00e9ma ker\u00fclt felfed\u00e9sre, amely megakad\u00e1lyozza a Linux rendszerek bet\u00f6lt\u00e9s\u00e9t, amelyek p\u00e1rhuzamosan vannak telep\u00edtve 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Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"