{"id":184024,"date":"2026-10-28T23:40:36","date_gmt":"2026-10-28T21:40:36","guid":{"rendered":"https:\/\/prohoster.info\/blog\/news\/udalyonnaya-uyazvimost-v-servernyh-uefi-proshivkah-ekspluatiruemaya-cherez-otpravku-icmp-paketa"},"modified":"2026-10-28T23:40:41","modified_gmt":"2026-10-28T21:40:41","slug":"remote-vulnerability-in-server-uefi-firmware-exploitable-by-sending-an-icmp-packet","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/news\/remote-vulnerability-in-server-uefi-firmware-exploitable-by-sending-an-icmp-packet","title":{"rendered":"Vzdialen\u00e1 zranite\u013enos\u0165 v serverov\u00fdch UEFI firmv\u00e9roch, zneu\u017e\u00edvan\u00e1 prostredn\u00edctvom odoslania ICMP paketu","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

V TianoCore EDK II (EFI Development Kit II), otvorenej referen\u010dnej implement\u00e1cii UEFI, ktor\u00e1 sa pou\u017e\u00edva vo v\u00e4\u010d\u0161ine serverov\u00fdch z\u00e1kladn\u00fdch dosiek, bola odstr\u00e1nen\u00e1 kritick\u00e1 zranite\u013enos\u0165 (CVE-2026-97631). Zranite\u013enos\u0165 sa nach\u00e1dza v PXE ovl\u00e1da\u010di a m\u00f4\u017ee by\u0165 zneu\u017eit\u00e1 zaslan\u00edm \u0161peci\u00e1lne upraven\u00fdch ICMP paketov po\u010das sie\u0165ov\u00e9ho zav\u00e1dzania v sie\u0165ach IPv4 alebo IPv6. \u00datok nevy\u017eaduje autentifik\u00e1ciu a umo\u017e\u0148uje \u00fato\u010dn\u00edkovi vykona\u0165 svoj k\u00f3d s privil\u00e9giami UEFI firmv\u00e9ru e\u0161te pred odovzdan\u00edm kontroly opera\u010dn\u00e9mu syst\u00e9mu, \u010do m\u00f4\u017ee by\u0165 pou\u017eit\u00e9 na ob\u00eddenie mechanizmu overenej in\u0161tal\u00e1cie UEFI Secure Boot a na vlo\u017eenie \u0161kodliv\u00fdch komponentov po\u010das zav\u00e1dzania.<\/p>\n

Probl\u00e9m je sp\u00f4soben\u00fd prete\u010den\u00edm bufferu v spracovate\u013eovi ICMP spr\u00e1v v ovl\u00e1da\u010di UefiPxeBcDxe, ktor\u00fd sa pou\u017e\u00edva pre PXE zav\u00e1dzanie a prij\u00edma ICMP pakety po\u010das sie\u0165ov\u00e9ho zav\u00e1dzania pre zaznamen\u00e1vanie sie\u0165ov\u00fdch ch\u00fdb. Prete\u010denie sa vyskytuje, preto\u017ee sa prijat\u00e9 chybov\u00e9 spr\u00e1vy ukladaj\u00fa do pevne stanoven\u00e9ho bufferu s ve\u013ekos\u0165ou 504 bajtov bez kontroly skuto\u010dnej ve\u013ekosti prijat\u00fdch d\u00e1t. Ak sa vy\u0161le viac ako 504 bajtov v ICMP pakete, nezapadaj\u00faci zvy\u0161ok sa zap\u00ed\u0161e mimo hranice bufferu a ovplyvn\u00ed nasleduj\u00face \u0161trukt\u00fary. <\/p>\n

\u00datok m\u00f4\u017ee by\u0165 vykonan\u00fd z glob\u00e1lnej siete \u2014 sta\u010d\u00ed pozna\u0165 IP adresu obete a vedie\u0165 ur\u010di\u0165 okamih PXE zav\u00e1dzania. Zn\u00e1me, ak\u00fd presne firmware sa pou\u017e\u00edva na serveri<\/a> obete, \u00fato\u010dn\u00edk m\u00f4\u017ee pripravi\u0165 exploit zoh\u013ead\u0148uj\u00faci umiestnenie \u0161trukt\u00far v pam\u00e4ti konkr\u00e9tneho zostavenie firmv\u00e9ru a zneu\u017ei\u0165 zranite\u013enos\u0165 na vykonanie k\u00f3du na \u00farovni DXE (Driver Execution Environment), ktor\u00fd sa vykon\u00e1va v nulovom ochrannom kruhu. <\/p>\n

Projekt EDK II bol otvoren\u00fd v roku 2004 spolo\u010dnos\u0165ou Intel a vyu\u017e\u00edvaj\u00fa ho v\u0161etci ve\u013ek\u00ed v\u00fdrobcovia firmv\u00e9rov pre serverov\u00e9 syst\u00e9my, d\u00e1tov\u00e9 centr\u00e1 a cloudov\u00fdch poskytovate\u013eov. Okrem in\u00e9ho sa pou\u017e\u00edva v firmv\u00e9roch AMI, Insyde a Phoenix. Zranite\u013enosti s\u00fa tie\u017e pr\u00edtomn\u00e9 v firmv\u00e9roch zalo\u017een\u00fdch na platforme Mu od spolo\u010dnosti Microsoft, ktor\u00e1 je fork EDK II.<\/p>\n

Probl\u00e9m bol identifikovan\u00fd z\u00e1stupcami spolo\u010dnost\u00ed Anthropic a Google a pl\u00e1novan\u00e9 na koordinovan\u00e9 verejn\u00e9 odhalenie v janu\u00e1ri 2027. Inform\u00e1cie v\u0161ak museli by\u0165 spr\u00edstupnen\u00e9 sk\u00f4r, preto\u017ee in\u017einier zo spolo\u010dnosti AMI omylom poru\u0161il embargo a zverejnil verejn\u00fd pull-request s opravou, na z\u00e1klade ktorej bolo mo\u017en\u00e9 pochopi\u0165 podstatu zranite\u013enosti.
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 TianoCore EDK II (EFI Development Kit II), \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u0439 \u044d\u0442\u0430\u043b\u043e\u043d\u043d\u043e\u0439 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 UEFI, \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u043e\u0439 \u0432 \u0431\u043e\u043b\u044c\u0448\u0438\u043d\u0441\u0442\u0432\u0435 \u0441\u0435\u0440\u0432\u0435\u0440\u043d\u044b\u0445 \u043c\u0430\u0442\u0435\u0440\u0438\u043d\u0441\u043a\u0438\u0445 \u043f\u043b\u0430\u0442, \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2026-97631). \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u0440\u0438\u0441\u0443\u0442\u0441\u0442\u0432\u0443\u0435\u0442 \u0432 \u0434\u0440\u0430\u0439\u0432\u0435\u0440\u0435 PXE \u0438 \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0430 \u0447\u0435\u0440\u0435\u0437 \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0443 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u044b\u0445 ICMP-\u043f\u0430\u043a\u0435\u0442\u043e\u0432 \u0432\u043e \u0432\u0440\u0435\u043c\u044f \u0441\u0435\u0442\u0435\u0432\u043e\u0439 \u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0438 \u0432 \u0441\u0435\u0442\u044f\u0445 IPv4 \u0438\u043b\u0438 IPv6. \u0410\u0442\u0430\u043a\u0430 \u043d\u0435 \u0442\u0440\u0435\u0431\u0443\u0435\u0442 \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438 \u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0437\u043b\u043e\u0443\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0438\u043a\u0443 \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u0441\u0432\u043e\u0439 \u043a\u043e\u0434 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-184024","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\n","aioseo_head_json":{"title":"\ud83e\udd47Dia\u013ekov\u00e1 zranite\u013enos\u0165 v serverov\u00fdch UEFI firmv\u00e9roch, vy\u017eaduje odoslanie ICMP paketu | ProHoster","description":"V TianoCore EDK II (EFI Development Kit II), otvorenej referen\u010dnej implement\u00e1cii UEFI pou\u017e\u00edvan\u00e9 na v\u00e4\u010d\u0161ine serverov\u00fdch z\u00e1kladn\u00fdch dosiek, bola odstr\u00e1nen\u00e1 kritick\u00e1 zranite\u013enos\u0165 (CVE-2026-97631).","canonical_url":"https:\/\/prohoster.info\/sk\/blog\/news\/remote-vulnerability-in-server-uefi-firmware-exploitable-by-sending-an-icmp-packet","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"sk_SK","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\u0423\u0434\u0430\u043b\u0451\u043d\u043d\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 \u0441\u0435\u0440\u0432\u0435\u0440\u043d\u044b\u0445 UEFI-\u043f\u0440\u043e\u0448\u0438\u0432\u043a\u0430\u0445, \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0438\u0440\u0443\u0435\u043c\u0430\u044f \u0447\u0435\u0440\u0435\u0437 \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0443 ICMP-\u043f\u0430\u043a\u0435\u0442\u0430 | ProHoster","og:description":"\u0412 TianoCore EDK II (EFI Development Kit II), \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u0439 \u044d\u0442\u0430\u043b\u043e\u043d\u043d\u043e\u0439 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 UEFI, \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u043e\u0439 \u0432 \u0431\u043e\u043b\u044c\u0448\u0438\u043d\u0441\u0442\u0432\u0435 \u0441\u0435\u0440\u0432\u0435\u0440\u043d\u044b\u0445 \u043c\u0430\u0442\u0435\u0440\u0438\u043d\u0441\u043a\u0438\u0445 \u043f\u043b\u0430\u0442, \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2026-97631).","og:url":"https:\/\/prohoster.info\/sk\/blog\/news\/remote-vulnerability-in-server-uefi-firmware-exploitable-by-sending-an-icmp-packet","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":"2026-10-28T21:40:36+00:00","article:modified_time":"2026-10-28T21:40:41+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":[],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/posts\/184024","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/comments?post=184024"}],"version-history":[{"count":1,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/posts\/184024\/revisions"}],"predecessor-version":[{"id":184025,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/posts\/184024\/revisions\/184025"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/media?parent=184024"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/categories?post=184024"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/tags?post=184024"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}