{"id":122049,"date":"2025-02-22T02:22:05","date_gmt":"2025-02-22T00:22:05","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-zagruzchike-grub2-vyyavlena-21-uyazvimost"},"modified":"2025-02-22T02:22:05","modified_gmt":"2025-02-22T00:22:05","slug":"v-zagruzchike-grub2-vyyavlena-21-uyazvimost","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/v-zagruzchike-grub2-vyyavlena-21-uyazvimost","title":{"rendered":"GRUB2 laadijast avastati 21 haavatavust","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Avaldatud teave 21 GRUB2 nurgas esineva haavatavuse kohta, millest enamik p\u00f5hjustab m\u00e4lupuhvri \u00fclet\u00e4itumise ja mille abil on v\u00f5imalik \u00fcletada UEFI Secure Booti allkirjastamise mehhanismi. Probleemid on seni lahendatud ainult plaastrina. Haavatavuste parandamise staatus jaotustes on saadaval j\u00e4rgmistel lehtedel: Debian, Ubuntu, SUSE, RHEL, Fedora. GRUB2 probleemide lahendamiseks ei piisa lihtsalt paketi uuendamisest, vajalik on ka uute sisemiste digitaalsete allkirjade koostamine ja installijate, laadijate, kernelipaketi, fwupd-firmware'i ja shim-kihiga kaasajamine.         <\/p>\n<p>Tuvastatud haavatavused:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2024-45774: m\u00e4lu\u00fclekanne l\u00e4heduses, kui anal\u00fc\u00fcsitakse spetsiaalselt loodud JPEG-pilte.\n<li class=\"l\">  CVE-2024-45776, CVE-2024-45777: t\u00e4isarvude \u00fclet\u00e4itumine spetsiaalselt loodud mo-failide lugemisel, mis viib m\u00e4lupuhvri \u00fclet\u00e4itumiseni.\n<li class=\"l\"> CVE-2024-45778, CVE-2024-45779: t\u00e4isarvude \u00fclet\u00e4itumine rikutud BFS failis\u00fcsteemiga t\u00f6\u00f6tamisel, mis p\u00f5hjustab m\u00e4lupuhvri \u00fclet\u00e4itumise.\n<li class=\"l\"> CVE-2024-45780: t\u00e4isarvude \u00fclet\u00e4itumine spetsiaalselt loodud tar-archive'ide t\u00f6\u00f6tlemisel, mis viib m\u00e4lupuhvri \u00fclet\u00e4itumiseni.\n<li class=\"l\"> CVE-2024-45781, CVE-2025-0677: puhver \u00fcletamine, kui t\u00f6\u00f6tatakse kahjustatud UFS failis\u00fcsteemiga.\n<li class=\"l\"> CVE-2024-45782, CVE-2025-1125: puhver \u00fcletamine, kui monteeritakse spetsiaalselt kujundatud HFS partitsioon.\n<li class=\"l\"> CVE-2025-0622: m\u00e4lu juurde p\u00e4\u00e4semine p\u00e4rast selle vabastamist moodulitega tegelemisel, mis v\u00f5ib viia r\u00fcndaja koodi t\u00e4itmiseni.\n<li class=\"l\"> CVE-2025-0624: puhver \u00fcletamine v\u00f5rgu kaudu k\u00e4ivitamisel.\n<li class=\"l\"> CVE-2025-0678: puhver \u00fcletamine kahjustatud Squash4 failis\u00fcsteemiga t\u00f6\u00f6tamisel.\n<li class=\"l\"> CVE-2025-0684: puhver \u00fcletamine s\u00fcmboolsete linkide haldamisel Reiserfs failis\u00fcsteemis.\n<li class=\"l\"> CVE-2025-0685: puhver \u00fcletamine s\u00fcmboolsete linkide haldamisel JFS failis\u00fcsteemis.\n<li class=\"l\"> CVE-2025-0685: puhver \u00fcletamine s\u00fcmboolsete linkide haldamisel ROMFS failis\u00fcsteemis.\n<li class=\"l\"> CVE-2025-0689: puhver \u00fcletamine, kui t\u00f6\u00f6tatakse spetsiaalselt muudetud UDF partitsiooniga.\n<li class=\"l\"> CVE-2025-0690: puhver \u00fcletamine, kui saadakse spetsiaalselt kujundatud andmeid klaviatuurilt.\n<li class=\"l\"> CVE-2025-1118: Lockdown isolatsioonire\u017eiimi v\u00e4ltimine ja juhuslikest m\u00e4luandmetest sisu v\u00e4ljav\u00f5tmine dump-k\u00e4sku t\u00e4ites.\n<li class=\"l\"> CVE-2024-45775: m\u00e4lu eraldamise vigakoodi kontrollimise puudumine edastatud argumendide parsimisel v\u00f5ib kahjustada IVT (Interrupt Vector Table) andmeid.\n<li class=\"l\"> CVE-2024-45783: nullviitadele p\u00e4\u00e4semine vigase HFS+ failis\u00fcsteemi montaa\u017ei korral.    <\/ul>\n<p>Enamikus Linuxi distributsioonides kasutatakse UEFI Secure Booti kinnitatud laadimise jaoks v\u00e4ikest shim-kihti, mille on digitaalallkirjastanud Microsoft. See kiht kontrollib GRUB2 oma sertifikaadiga, v\u00f5imaldades distributsioonide arendajatel mitte allkirjastada iga kernelit ja GRUB-i Microsoftis. GRUB2 haavatavused v\u00f5imaldavad koodi k\u00e4ivitamist p\u00e4rast shim-i edukat kontrollimist, kuid enne operatsioonis\u00fcsteemi laadimist, sekkudes usaldusketti aktiivse Secure Booti re\u017eiimis ja saavutades t\u00e4ieliku kontrolli edasise laadimisprotsessi \u00fcle, n\u00e4iteks teise operatsioonis\u00fcsteemi laadimise, operatsioonis\u00fcsteemi komponentide modifitseerimise ja Lockdown kaitse \u00fcmbersuunamise jaoks.     <\/p>\n<p>Digitaalallkirja tagasi v\u00f5tmata haavatavuse blokeerimiseks v\u00f5ivad distributsioonid kasutada SBAT (UEFI Secure Boot Advanced Targeting) mehhanismi, mille toetust on rakendatud GRUB2, shim ja fwupd enamikus populaarsetes Linuxi distributsioonides. SBAT on v\u00e4lja t\u00f6\u00f6tatud koost\u00f6\u00f6s Microsoftiga ning see h\u00f5lmab t\u00e4iendavate metainformatsioonide lisamist UEFI komponente sisaldavatesse t\u00e4iturfailidesse, sealhulgas tootja, toote, komponendi ja versiooni teavet. Mainitud metainformatsioon on digitaalallkirjaga allkirjastatud ja seda saab eraldi lisada lubatud v\u00f5i keelatud komponentide loetellu UEFI Secure Boot jaoks.      <\/p>\n<p>SBAT v\u00f5imaldab blokeerida digitaalallkirja kasutamise konkreetsete komponentide versiooninumbrite jaoks ilma Secure Booti v\u00f5tmete tagasiv\u00f5tmiseta. SBAT kaudu haavatavuste blokeerimine ei vaja UEFI (dbx) tagasiv\u00f5etud sertifikaatide loetelu kasutamist, vaid toimub sisemise v\u00f5tme asendamise tasemel allkirjade genereerimiseks ja GRUB2, shim ja muude tarnitud distributsioonide k\u00e4ivitamisartefaktide uuendamiseks. Enne SBAT rakendamist oli tagasiv\u00f5etud sertifikaatide loetelu (dbx, UEFI tagasiv\u00f5etud loend) uuendamine h\u00e4davajalik, et haavatavus t\u00e4ielikult blokeerida, kuna r\u00fcndaja, s\u00f5ltumata kasutatavast operatsioonis\u00fcsteemist, sai UEFI Secure Booti kompromiteerimiseks kasutada vananemistootes haavatavat GRUB2 versiooni, mille digitaalallkiri oli kinnitatud.<br \/>\n<br \/>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=62771\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u043e 21 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 \u0437\u0430\u0433\u0440\u0443\u0437\u0447\u0438\u043a\u0435 GRUB2, \u0431\u043e\u043b\u044c\u0448\u0438\u043d\u0441\u0442\u0432\u043e \u0438\u0437 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0442 \u043a \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044e \u0431\u0443\u0444\u0435\u0440\u0430 \u0438 \u043c\u043e\u0433\u0443\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c\u0441\u044f \u0434\u043b\u044f \u043e\u0431\u0445\u043e\u0434\u0430 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u0430 \u0432\u0435\u0440\u0438\u0444\u0438\u0446\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0439 \u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0438 UEFI Secure Boot. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u043f\u043e\u043a\u0430 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0442\u043e\u043b\u044c\u043a\u043e \u0432 \u0432\u0438\u0434\u0435 \u043f\u0430\u0442\u0447\u0430. \u0421\u0442\u0430\u0442\u0443\u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u0432 \u0434\u0438\u0441\u0442\u0440\u0438\u0431\u0443\u0442\u0438\u0432\u0430\u0445 \u043c\u043e\u0436\u043d\u043e \u043e\u0446\u0435\u043d\u0438\u0442\u044c \u043d\u0430 \u0434\u0430\u043d\u043d\u044b\u0445 \u0441\u0442\u0440\u0430\u043d\u0438\u0446\u0430\u0445: Debian, Ubuntu, SUSE, RHEL, Fedora. \u0414\u043b\u044f \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f \u043f\u0440\u043e\u0431\u043b\u0435\u043c \u0432 GRUB2 \u043d\u0435\u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u043f\u0440\u043e\u0441\u0442\u043e [&hellip;]<\/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-122049","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u043e 21 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 \u0437\u0430\u0433\u0440\u0443\u0437\u0447\u0438\u043a\u0435 GRUB2, \u0431\u043e\u043b\u044c\u0448\u0438\u043d\u0441\u0442\u0432\u043e \u0438\u0437 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0442 \u043a 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\/>\n\t\t<meta property=\"og:image:height\" content=\"350\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2025-02-22T00:22:05+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2025-02-22T00:22:05+00:00\" \/>\n\t\t<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"\ud83e\udd47GRUB2 k\u00e4ivitajas avastati 21 haavatavust | ProHoster","description":"Avalikustatud on teave 21 GRUB2 k\u00e4ivitaja haavatavuse kohta, millest enamik p\u00f5hjustab puhvers\u00e4ili \u00fclevoolu ja v\u00f5ib v\u00f5imaldada UEFI Secure Booti kontrollimise v\u00e4ltimist. Probleemid on seni lahendatud vaid plaastri n\u00e4ol. Haavatavuste lahendamise staatusi erinevates distributsioonides saab hinnata j\u00e4rgmistelt lehtedelt: Debian, Ubuntu, SUSE, RHEL, Fedora. 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