{"id":170807,"date":"2026-05-16T06:24:35","date_gmt":"2026-05-16T04:24:35","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/qemutiny-uyazvimosti-v-qemu-pozvolyayushhie-poluchit-dostup-k-host-okruzheniyu-iz-gostevoj-sistemy"},"modified":"2026-05-16T06:24:35","modified_gmt":"2026-05-16T04:24:35","slug":"qemutiny-uyazvimosti-v-qemu-pozvolyayushhie-poluchit-dostup-k-host-okruzheniyu-iz-gostevoj-sistemy","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hr\/blog\/news\/qemutiny-uyazvimosti-v-qemu-pozvolyayushhie-poluchit-dostup-k-host-okruzheniyu-iz-gostevoj-sistemy","title":{"rendered":"QEMUtiny \u2014 ranjivosti u QEMU koje omogu\u0107uju pristup host okru\u017eenju iz gostuju\u0107eg sustava","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Istra\u017eiva\u010di koji su nedavno otkrili ranjivost Fragnesia u Linux jezgru objavili su informacije o ranjivostima u QEMU koje omogu\u0107avaju dobivanje root pristupa hostoskom okru\u017eenju iz gostuju\u0107eg sistema. Problem je dobio kodno ime QEMUtiny, ali CVE identifikator za sada nije dodeljen. Pripremljen je eksploitat koji koristi dve ranjivosti u kodu za emulaciju ure\u0111aja CXL (Compute Express Link). <\/p>\n

Obe ranjivosti prisutne su u kodu cxl-mailbox-utils.c. Prva ranjivost javlja se od izdanja QEMU 7.1.0 i dovodi do \u010ditanja memorije izvan dodijeljenog bafera zbog toga \u0161to funkcija cmd_logs_get_log() pogre\u0161no tuma\u010di zatra\u017eeni pomak CEL-loga kao indeks u nizu, dok se on postavlja u bajtovima. Druga ranjivost javlja se od QEMU 11.0.0 i dovodi do preljeva bafera u funkciji cmd_features_set_feature() zbog obrade pomaka na strukture pri zapisivanju atributa bez provjere da li izra\u010dunata vrijednost \u201eoffset + bytes_to_copy\u201c stane unutar veli\u010dine odabrane strukture. <\/p>\n

Upravo, napad je mogu\u0107 samo na najnoviju verziju QEMU 11.0.0. O ispravci jo\u0161 ni\u0161ta nije objavljeno, re\u010deno je samo da je pre otkrivanja ranjivosti, informacija o njoj predana razvojnim timovima QEMU, koji su odgovorili da podr\u0161ka za CXL ure\u0111aj u QEMU nije realizovana za kori\u0161\u0107enje u virtuelizaciji. <\/p>\n

Eksploitat je testiran sa kodnom bazom QEMU od 11. maja sa poslednjim komitovanjem 5e61afe. Rad eksploita zavisi od rasporeda struktura u memoriji svakog specifi\u010dnog izdanja QEMU i sistemske libc, ali po mi\u0161ljenju istra\u017eiva\u010da, koriste\u0107i ranjivost koja dovodi do \u010ditanja izvan bafera za skeniranje memorije, mo\u017ee se stvoriti univerzalni eksploitat koji radi sa razli\u010ditim verzijama QEMU.
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Izvor: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0418\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0438, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043d\u0430 \u0434\u043d\u044f\u0445 \u0432\u044b\u044f\u0432\u0438\u043b\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c Fragnesia \u0432 \u044f\u0434\u0440\u0435 Linux, \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b\u0438 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044e \u043e\u0431 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044f\u0445 \u0432 QEMU, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0445 \u0438\u0437 \u0433\u043e\u0441\u0442\u0435\u0432\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c root-\u0434\u043e\u0441\u0442\u0443\u043f \u043a \u0445\u043e\u0441\u0442-\u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u044e. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0435 \u043f\u0440\u0438\u0441\u0432\u043e\u0435\u043d\u043e \u043a\u043e\u0434\u043e\u0432\u043e\u0435 \u0438\u043c\u044f QEMUtiny, \u043d\u043e CVE-\u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440 \u043f\u043e\u043a\u0430 \u043d\u0435 \u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d. \u041f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043b\u0435\u043d \u044d\u043a\u0441\u043f\u043b\u043e\u0438\u0442, \u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u0437\u0430\u0434\u0435\u0439\u0441\u0442\u0432\u043e\u0432\u0430\u043d\u044b \u0434\u0432\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 \u043a\u043e\u0434\u0435 \u044d\u043c\u0443\u043b\u044f\u0446\u0438\u0438 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u0430 CXL (Compute Express Link). \u041e\u0431\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043f\u0440\u0438\u0441\u0443\u0442\u0441\u0442\u0432\u0443\u044e\u0442 \u0432 \u043a\u043e\u0434\u0435 cxl-mailbox-utils.c. […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-170807","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\udd47QEMUtiny \u2014 ranjivosti u QEMU koje omogu\u0107avaju pristup hostoskom okru\u017eenju iz gostuju\u0107eg sistema | ProHoster","description":"Istra\u017eiva\u010di koji su nedavno otkrili ranjivost Fragnesia u Linux jezgru objavili su informacije o ranjivostima u QEMU koje omogu\u0107avaju dobivanje root pristupa hostoskom okru\u017eenju iz gostuju\u0107eg sistema.","canonical_url":"https:\/\/prohoster.info\/hr\/blog\/news\/qemutiny-uyazvimosti-v-qemu-pozvolyayushhie-poluchit-dostup-k-host-okruzheniyu-iz-gostevoj-sistemy","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"hr_HR","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\udd47QEMUtiny \u2014 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 QEMU, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0435 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u0434\u043e\u0441\u0442\u0443\u043f \u043a \u0445\u043e\u0441\u0442-\u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u044e \u0438\u0437 \u0433\u043e\u0441\u0442\u0435\u0432\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b | ProHoster","og:description":"\u0418\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0438, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043d\u0430 \u0434\u043d\u044f\u0445 \u0432\u044b\u044f\u0432\u0438\u043b\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c Fragnesia \u0432 \u044f\u0434\u0440\u0435 Linux, \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b\u0438 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044e \u043e\u0431 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044f\u0445 \u0432 QEMU, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0445 \u0438\u0437 \u0433\u043e\u0441\u0442\u0435\u0432\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c root-\u0434\u043e\u0441\u0442\u0443\u043f \u043a \u0445\u043e\u0441\u0442-\u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u044e.","og:url":"https:\/\/prohoster.info\/hr\/blog\/news\/qemutiny-uyazvimosti-v-qemu-pozvolyayushhie-poluchit-dostup-k-host-okruzheniyu-iz-gostevoj-sistemy","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":"2026-05-16T04:24:35+00:00","article:modified_time":"2026-05-16T04:24:35+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\/hr\/wp-json\/wp\/v2\/posts\/170807","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/hr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/hr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/hr\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/hr\/wp-json\/wp\/v2\/comments?post=170807"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/hr\/wp-json\/wp\/v2\/posts\/170807\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/hr\/wp-json\/wp\/v2\/media?parent=170807"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/hr\/wp-json\/wp\/v2\/categories?post=170807"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/hr\/wp-json\/wp\/v2\/tags?post=170807"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}