{"id":112924,"date":"2024-01-15T17:28:03","date_gmt":"2024-01-15T15:28:03","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-patchah-red-hat-k-zagruzchiku-grub2-pozvolyayushhaya-obojti-proverku-parolya"},"modified":"2024-01-15T17:28:03","modified_gmt":"2024-01-15T15:28:03","slug":"uyazvimost-v-patchah-red-hat-k-zagruzchiku-grub2-pozvolyayushhaya-obojti-proverku-parolya","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/uyazvimost-v-patchah-red-hat-k-zagruzchiku-grub2-pozvolyayushhaya-obojti-proverku-parolya","title":{"rendered":"Sebezhet\u0151s\u00e9g a Red Hat GRUB2 ind\u00edt\u00f3j\u00e1nak jav\u00edt\u00e1saiban, amely lehet\u0151v\u00e9 teszi a jelsz\u00f3ellen\u0151rz\u00e9s megker\u00fcl\u00e9s\u00e9t.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Felt\u00e1rt\u00e1k a CVE-2023-4001 sebezhet\u0151s\u00e9gr\u0151l sz\u00f3l\u00f3 inform\u00e1ci\u00f3t, amely a Red Hat \u00e1ltal kiadott GRUB2 bootloader jav\u00edt\u00e1saiban tal\u00e1lhat\u00f3. A sebezhet\u0151s\u00e9g lehet\u0151v\u00e9 teszi, hogy sok UEFI rendszerben megker\u00fclj\u00e9k a GRUB2 jelsz\u00f3v\u00e9delm\u00e9t, amely a boot men\u00fc vagy a bootloader parancssor\u00e1nak hozz\u00e1f\u00e9r\u00e9s\u00e9t korl\u00e1tozza. A sebezhet\u0151s\u00e9g oka a Red Hat \u00e1ltal a RHEL \u00e9s Fedora Linux sz\u00e1m\u00e1ra kiadott GRUB2 csomagban v\u00e9grehajtott m\u00f3dos\u00edt\u00e1s. A probl\u00e9ma nem jelentkezik a GRUB2 f\u0151 projektj\u00e9ben, \u00e9s csak azokat a disztrib\u00faci\u00f3kat \u00e9rinti, amelyek alkalmazt\u00e1k a Red Hat tov\u00e1bbi jav\u00edt\u00e1sait. <\/p>\n

A probl\u00e9ma az UUID haszn\u00e1lat\u00e1nak logikai hib\u00e1j\u00e1b\u00f3l ered, amely a konfigur\u00e1ci\u00f3s f\u00e1jlt tartalmaz\u00f3 eszk\u00f6zbet\u00f6lt\u0151 keres\u00e9s\u00e9hez vezet (p\u00e9ld\u00e1ul: \/boot\/efi\/EFI\/fedora\/grub.cfg), amely tartalmazza a jelsz\u00f3 hash-\u00e9t. Az autentik\u00e1ci\u00f3 megker\u00fcl\u00e9s\u00e9re a sz\u00e1m\u00edt\u00f3g\u00e9phez fizikailag hozz\u00e1f\u00e9r\u0151 felhaszn\u00e1l\u00f3 csatlakoztathat egy k\u00fcls\u0151 t\u00e1rol\u00f3t, p\u00e9ld\u00e1ul USB Flash-t, amelynek UUID-j\u00e1t a t\u00e1madott rendszer \/boot part\u00edci\u00f3j\u00e1nak azonos\u00edt\u00f3j\u00e1val azonos\u00edtja. <\/p>\n

Sok UEFI rendszer els\u0151dlegesen a k\u00fcls\u0151 t\u00e1rol\u00f3kat dolgozza fel, \u00e9s ezeket az \u00e1lland\u00f3 t\u00e1rol\u00f3k el\u0151tt szerepelteti a felfedezett eszk\u00f6z\u00f6k list\u00e1j\u00e1n, ez\u00e9rt a t\u00e1mad\u00f3 \u00e1ltal el\u0151k\u00e9sz\u00edtett \/boot part\u00edci\u00f3 lesz a feldolgoz\u00e1s sor\u00e1n a priorit\u00e1sos. A GRUB2 megpr\u00f3b\u00e1lja bet\u00f6lteni a konfigur\u00e1ci\u00f3s f\u00e1jlt ebb\u0151l a part\u00edci\u00f3b\u00f3l. A GRUB2-ben a 'search' parancs sor\u00e1n a UUID els\u0151 tal\u00e1lat\u00e1nak meghat\u00e1roz\u00e1sa t\u00f6rt\u00e9nik, amely ut\u00e1n a keres\u00e9s le\u00e1ll. Ha a megadott part\u00edci\u00f3n a f\u0151 konfigur\u00e1ci\u00f3s f\u00e1jl nem tal\u00e1lhat\u00f3 meg, a GRUB2 parancssori promptot ad, amely lehet\u0151v\u00e9 teszi a tov\u00e1bbi boot folyamat teljes ir\u00e1ny\u00edt\u00e1s\u00e1t. <\/p>\n

A lok\u00e1lis, nem adminisztr\u00e1tori felhaszn\u00e1l\u00f3 az 'lsblk' seg\u00e9dprogram seg\u00edts\u00e9g\u00e9vel hat\u00e1rozhatja meg a part\u00edci\u00f3 UUID-j\u00e1t, de a rendszert nem el\u00e9r\u0151 k\u00fcls\u0151 felhaszn\u00e1l\u00f3, aki figyelemmel k\u00eds\u00e9ri a boot folyamatot, bizonyos disztrib\u00faci\u00f3kban l\u00e1thatja az UUID-t a bootol\u00e1s sor\u00e1n megjelen\u0151 diagnosztikai \u00fczenetekb\u0151l. A sebezhet\u0151s\u00e9get a Red Hat kijav\u00edtotta az 'search' parancshoz egy \u00faj argumentum hozz\u00e1ad\u00e1s\u00e1val, amely lehet\u0151v\u00e9 teszi, hogy a UUID keres\u00e9si m\u0171veletet kiz\u00e1r\u00f3lag a boot menedzser ind\u00edt\u00e1s\u00e1ra haszn\u00e1lt blokkeszk\u00f6z\u00f6kh\u00f6z k\u00f6sse (azaz a \/boot part\u00edci\u00f3nak ugyanazon a lemezen kell lennie, mint az EFI rendszerpart\u00edci\u00f3nak).
\n
Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0420\u0430\u0441\u043a\u0440\u044b\u0442\u0430 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u043e\u0431 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (CVE-2023-4001) \u0432 \u043f\u0430\u0442\u0447\u0430\u0445 \u043a \u0437\u0430\u0433\u0440\u0443\u0437\u0447\u0438\u043a\u0443 GRUB2, \u043f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043b\u0435\u043d\u043d\u044b\u0445 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0435\u0439 Red Hat. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043d\u0430 \u043c\u043d\u043e\u0433\u0438\u0445 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445 \u0441 UEFI \u043e\u0431\u043e\u0439\u0442\u0438 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0443 \u043f\u0430\u0440\u043e\u043b\u044f, \u0432\u044b\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0432 GRUB2 \u0434\u043b\u044f \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u044f \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043a \u0437\u0430\u0433\u0440\u0443\u0437\u043e\u0447\u043d\u043e\u043c\u0443 \u043c\u0435\u043d\u044e \u0438\u043b\u0438 \u043a\u043e\u043c\u0430\u043d\u0434\u043d\u043e\u0439 \u0441\u0442\u0440\u043e\u043a\u0435 \u0437\u0430\u0433\u0440\u0443\u0437\u0447\u0438\u043a\u0430. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0435\u043c, \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u043d\u044b\u043c \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0435\u0439 Red Hat \u0432 \u043f\u0430\u043a\u0435\u0442 \u0441 GRUB2, \u043f\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u043c\u044b\u0439 \u0432 RHEL \u0438 Fedora Linux. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\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-112924","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\udd47Red Hat GRUB2 bet\u00f6lt\u0151h\u00f6z k\u00e9sz\u00fclt jav\u00edt\u00e1saiban tal\u00e1lhat\u00f3 sebezhet\u0151s\u00e9g, amely lehet\u0151v\u00e9 teszi a jelsz\u00f3ellen\u0151rz\u00e9s megker\u00fcl\u00e9s\u00e9t | ProHoster","description":"Felfedt\u00e9k a GRUB2 bet\u00f6lt\u0151h\u00f6z k\u00e9sz\u00fclt Red Hat jav\u00edt\u00e1sokban tal\u00e1lhat\u00f3 CVE-2023-4001 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\u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0443 \u043f\u0430\u0440\u043e\u043b\u044f | ProHoster","og:description":"\u0420\u0430\u0441\u043a\u0440\u044b\u0442\u0430 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u043e\u0431 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (CVE-2023-4001) \u0432 \u043f\u0430\u0442\u0447\u0430\u0445 \u043a \u0437\u0430\u0433\u0440\u0443\u0437\u0447\u0438\u043a\u0443 GRUB2, \u043f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043b\u0435\u043d\u043d\u044b\u0445 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0435\u0439 Red Hat.","og:url":"https:\/\/prohoster.info\/hu\/blog\/news\/uyazvimost-v-patchah-red-hat-k-zagruzchiku-grub2-pozvolyayushhaya-obojti-proverku-parolya","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":"2024-01-15T15:28:03+00:00","article:modified_time":"2024-01-15T15:28:03+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":[],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts\/112924","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/comments?post=112924"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts\/112924\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/media?parent=112924"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/categories?post=112924"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/tags?post=112924"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}