{"id":105601,"date":"2022-11-16T21:37:02","date_gmt":"2022-11-16T19:37:02","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/dve-uyazvimosti-v-grub2-pozvolyayushhie-obojti-zashhitu-uefi-secure-boot"},"modified":"2022-11-16T21:37:02","modified_gmt":"2022-11-16T19:37:02","slug":"dve-uyazvimosti-v-grub2-pozvolyayushhie-obojti-zashhitu-uefi-secure-boot","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/news\/dve-uyazvimosti-v-grub2-pozvolyayushhie-obojti-zashhitu-uefi-secure-boot","title":{"rendered":"Dy vulnerabilitete n\u00eb GRUB2, t\u00eb cilat lejojn\u00eb kalimin e mbrojtjes UEFI Secure Boot","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Jan\u00eb zbuluar informacionet p\u00ebr dy vulnerabilitete n\u00eb ngarkuesin GRUB2, t\u00eb cilat mund t\u00eb \u00e7ojn\u00eb n\u00eb ekzekutimin e kodit kur p\u00ebrdoren fonte t\u00eb dizajnuara posa\u00e7\u00ebrisht dhe procesimi i sekuencave t\u00eb caktuara Unicode. Vulnerabilitetet mund t\u00eb p\u00ebrdoren p\u00ebr t\u00eb anashkaluar mekanizmin e verifikimit t\u00eb ngarkes\u00ebs UEFI Secure Boot.        <\/p>\n<p>Vulnerabilitetet e identifikuara:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2022-2601 &#8212; \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u0431\u0443\u0444\u0435\u0440\u0430 \u0432 \u0444\u0443\u043d\u043a\u0446\u0438\u0438  grub_font_construct_glyph() \u043f\u0440\u0438 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0435 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u044b\u0445 \u0448\u0440\u0438\u0444\u0442\u043e\u0432 \u0432 \u0444\u043e\u0440\u043c\u0430\u0442\u0435 pf2, \u0432\u043e\u0437\u043d\u0438\u043a\u0430\u044e\u0449\u0435\u0435 \u0438\u0437-\u0437\u0430 \u043d\u0435\u0432\u0435\u0440\u043d\u043e\u0433\u043e \u0440\u0430\u0441\u0447\u0451\u0442\u0430 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u0430 max_glyph_size \u0438 \u0432\u044b\u0434\u0435\u043b\u0435\u043d\u0438\u044f \u043e\u0431\u043b\u0430\u0441\u0442\u0438 \u043f\u0430\u043c\u044f\u0442\u0438, \u0437\u0430\u0432\u0435\u0434\u043e\u043c\u043e \u043c\u0435\u043d\u044c\u0448\u0435\u0439, \u0447\u0435\u043c \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u043e \u0434\u043b\u044f \u0440\u0430\u0437\u043c\u0435\u0449\u0435\u043d\u0438\u044f \u0433\u043b\u0438\u0444\u043e\u0432.\n<li class=\"l\"> CVE-2022-3775 &#8212; \u0437\u0430\u043f\u0438\u0441\u044c \u0437\u0430 \u043f\u0440\u0435\u0434\u0435\u043b\u044b \u0432\u044b\u0434\u0435\u043b\u0435\u043d\u043d\u043e\u0439 \u043e\u0431\u043b\u0430\u0441\u0442\u0438 \u043f\u0430\u043c\u044f\u0442\u0438 \u043f\u0440\u0438 \u043e\u0442\u0440\u0438\u0441\u043e\u0432\u043a\u0435 \u043d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043f\u043e\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0435\u0439 Unicode \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u044b\u043c \u0448\u0440\u0438\u0444\u0442\u043e\u043c. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u0438\u0441\u0443\u0442\u0441\u0442\u0432\u0443\u0435\u0442 \u0432 \u043a\u043e\u0434\u0435 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0448\u0440\u0438\u0444\u0442\u043e\u0432 \u0438 \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u0435\u043c \u0434\u043e\u043b\u0436\u043d\u044b\u0445 \u043f\u0440\u043e\u0432\u0435\u0440\u043e\u043a \u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0438\u044f \u0448\u0438\u0440\u0438\u043d\u044b \u0438 \u0432\u044b\u0441\u043e\u0442\u044b \u0433\u043b\u0438\u0444\u0430 \u0440\u0430\u0437\u043c\u0435\u0440\u0443 \u0438\u043c\u0435\u044e\u0449\u0435\u0439\u0441\u044f \u0431\u0438\u0442\u043e\u0432\u043e\u0439 \u043a\u0430\u0440\u0442\u044b. \u0410\u0442\u0430\u043a\u0443\u044e\u0449\u0438\u0439 \u043c\u043e\u0436\u0435\u0442 \u043f\u043e\u0434\u043e\u0431\u0440\u0430\u0442\u044c \u0432\u0432\u043e\u0434 \u0442\u0430\u043a\u0438\u043c \u043e\u0431\u0440\u0430\u0437\u043e\u043c, \u0447\u0442\u043e\u0431\u044b \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u0437\u0430\u043f\u0438\u0441\u044c \u0445\u0432\u043e\u0441\u0442\u0430 \u0434\u0430\u043d\u043d\u044b\u0445 \u043d\u0430 \u043f\u0440\u0435\u0434\u0435\u043b\u0430\u043c\u0438 \u0432\u044b\u0434\u0435\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0431\u0443\u0444\u0435\u0440\u0430. \u041e\u0442\u043c\u0435\u0447\u0430\u0435\u0442\u0441\u044f, \u0447\u0442\u043e \u043d\u0435\u0441\u043c\u043e\u0442\u0440\u044f \u043d\u0430 \u0441\u043b\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438, \u0434\u043e\u0432\u0435\u0434\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u0434\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043a\u043e\u0434\u0430 \u043d\u0435 \u0438\u0441\u043a\u043b\u044e\u0447\u0430\u0435\u0442\u0441\u044f.                <\/ul>\n<p> Nj\u00eb rregullim \u00ebsht\u00eb publikuar n\u00eb form\u00ebn e nj\u00eb patch-i. Statusi i korrigjimit t\u00eb vulnerabiliteteve n\u00eb shp\u00ebrndarjet mund t\u00eb vler\u00ebsohet n\u00eb k\u00ebto faqe: Ubuntu, SUSE, RHEL, Fedora, Debian. P\u00ebr t\u00eb adresuar problemet n\u00eb GRUB2 nuk mjafton vet\u00ebm t\u00eb p\u00ebrdit\u00ebsohet paketa, do t\u00eb nevojitet gjithashtu t\u00eb krijohen n\u00ebnshkrime t\u00eb reja digjitale dhe t\u00eb p\u00ebrdit\u00ebsohen instaluesit, ngarkuesit, paketat e b\u00ebrtham\u00ebs, firmware t\u00eb fwupd, dhe shim-layer.       <\/p>\n<p>N\u00eb shumic\u00ebn e shp\u00ebrndarjeve Linux, p\u00ebr ngarkimin e verifikuar n\u00eb m\u00ebnyr\u00ebn UEFI Secure Boot p\u00ebrdoret nj\u00eb shtres\u00eb e vog\u00ebl shim, e n\u00ebnshkruar digjitalisht nga Microsoft. Kjo shtres\u00eb verifikon GRUB2 me certifikat\u00ebn e saj, duke lejuar zhvilluesit e shp\u00ebrndarjeve t\u00eb mos n\u00ebnshkruajn\u00eb \u00e7do p\u00ebrdit\u00ebsim t\u00eb b\u00ebrtham\u00ebs dhe GRUB te Microsoft. Vulnerabilitetet n\u00eb GRUB2 lejojn\u00eb ekzekutimin e kodit t\u00eb tij pas suksesit t\u00eb verifikimit t\u00eb shim, por para ngarkimit t\u00eb sistemit operativ, duke nd\u00ebrhyr\u00eb n\u00eb zinxhirin e besimit gjat\u00eb aktivizimit t\u00eb Secure Boot dhe duke fituar kontroll t\u00eb plot\u00eb mbi procesin e ngarkimit, duke p\u00ebrfshir\u00eb ngarkimin e nj\u00eb sistemi operativ tjet\u00ebr, modifikimin e komponent\u00ebve t\u00eb sistemit operativ dhe kalimin e mbrojtjes Lockdown.     <\/p>\n<p>P\u00ebr t\u00eb bllokuar vulnerabilitetin pa anulluar n\u00ebnshkrimin digjital, shp\u00ebrndarjet mund t\u00eb p\u00ebrdorin mekanizmin SBAT (UEFI Secure Boot Advanced Targeting), mb\u00ebshtetje e t\u00eb cilit \u00ebsht\u00eb realizuar p\u00ebr GRUB2, shim dhe fwupd n\u00eb shumic\u00ebn e shp\u00ebrndarjeve t\u00eb njohura Linux. SBAT \u00ebsht\u00eb zhvilluar n\u00eb bashk\u00ebpunim me Microsoft dhe parashikon shtimin e metadatas n\u00eb skedar\u00ebt ekzekutiv\u00eb t\u00eb komponenteve UEFI, q\u00eb p\u00ebrfshin informacion mbi prodhuesin, produktin, komponentin dhe versionin. K\u00ebto metadata n\u00ebnshkruhen me nj\u00eb n\u00ebnshkrim digjital dhe mund t\u00eb p\u00ebrfshihen ve\u00e7mas n\u00eb listat e miratuara ose t\u00eb ndaluara p\u00ebr UEFI Secure Boot.      <\/p>\n<p>SBAT lejon t\u00eb bllokoj\u00eb p\u00ebrdorimin e n\u00ebnshkrimit digjital p\u00ebr numrat e ve\u00e7ant\u00eb t\u00eb versioneve t\u00eb komponent\u00ebve pa pasur nevoj\u00eb p\u00ebr t\u00eb t\u00ebrhequr \u00e7el\u00ebsat p\u00ebr Secure Boot. Bllokimi i dob\u00ebsive p\u00ebrmes SBAT nuk k\u00ebrkon p\u00ebrdorimin e list\u00ebs s\u00eb t\u00ebrhequr t\u00eb certifikatave UEFI (dbx), por realizohet n\u00eb nivelin e z\u00ebvend\u00ebsimit t\u00eb \u00e7el\u00ebsit t\u00eb brendsh\u00ebm p\u00ebr formimin e n\u00ebnshkrimeve dhe p\u00ebrdit\u00ebsimin e GRUB2, shim dhe artefakteve tjera t\u00eb ngarkes\u00ebs q\u00eb ofrohen nga distribucione. Para zbatimit t\u00eb SBAT, p\u00ebrdit\u00ebsimi i list\u00ebs s\u00eb t\u00ebrhequr t\u00eb certifikatave (dbx, Lista e Revokuar e UEFI) ishte nj\u00eb kusht i domosdosh\u00ebm p\u00ebr bllokimin e plot\u00eb t\u00eb dob\u00ebsis\u00eb, pasi sulmuesi, pavar\u00ebsisht nga sistemi operativ i p\u00ebrdorur, mund t\u00eb p\u00ebrdorte nj\u00eb medium ngarkese me nj\u00eb version t\u00eb vjet\u00ebr t\u00eb GRUB2, t\u00eb verifikuar me nj\u00eb n\u00ebnshkrim digjital, p\u00ebr t\u00eb komprometuar UEFI Secure Boot.<br \/>\n<br \/>Burimi: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=58130\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0420\u0430\u0441\u043a\u0440\u044b\u0442\u044b \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u043e \u0434\u0432\u0443\u0445 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044f\u0445 \u0432 \u0437\u0430\u0433\u0440\u0443\u0437\u0447\u0438\u043a\u0435 GRUB2, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043c\u043e\u0433\u0443\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044e \u043a\u043e\u0434\u0430 \u043f\u0440\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u044b\u0445 \u0448\u0440\u0438\u0444\u0442\u043e\u0432 \u0438 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0435 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u044b\u0445 Unicode-\u043f\u043e\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0435\u0439. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\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. \u0412\u044b\u044f\u0432\u043b\u0435\u043d\u043d\u044b\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438: CVE-2022-2601 &#8212; \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u0431\u0443\u0444\u0435\u0440\u0430 \u0432 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 grub_font_construct_glyph() \u043f\u0440\u0438 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0435 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u044b\u0445 \u0448\u0440\u0438\u0444\u0442\u043e\u0432 \u0432 \u0444\u043e\u0440\u043c\u0430\u0442\u0435 pf2, \u0432\u043e\u0437\u043d\u0438\u043a\u0430\u044e\u0449\u0435\u0435 \u0438\u0437-\u0437\u0430 \u043d\u0435\u0432\u0435\u0440\u043d\u043e\u0433\u043e \u0440\u0430\u0441\u0447\u0451\u0442\u0430 [&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-105601","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0420\u0430\u0441\u043a\u0440\u044b\u0442\u044b \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u043e \u0434\u0432\u0443\u0445 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044f\u0445 \u0432 \u0437\u0430\u0433\u0440\u0443\u0437\u0447\u0438\u043a\u0435 GRUB2, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043c\u043e\u0433\u0443\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 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