{"id":181859,"date":"2026-06-02T14:48:28","date_gmt":"2026-06-02T12:48:28","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/obnovlenie-x-org-server-21-1-23-s-ustraneniem-9-uyazvimostej"},"modified":"2026-06-02T14:48:28","modified_gmt":"2026-06-02T12:48:28","slug":"obnovlenie-x-org-server-21-1-23-s-ustraneniem-9-uyazvimostej","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/news\/obnovlenie-x-org-server-21-1-23-s-ustraneniem-9-uyazvimostej","title":{"rendered":"Aktualiz\u00e1cia X.Org Server 21.1.23 s odstr\u00e1nen\u00edm 9 zranite\u013enost\u00ed","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Boli zverejnen\u00e9 opravy X.Org Server 21.1.23 a DDX komponenty (Device-Dependent X) xwayland 24.1.12, ktor\u00e9 zabezpe\u010duj\u00fa spustenie X.Org Servera pre vykon\u00e1vanie X11 aplik\u00e1ci\u00ed v prostrediach zalo\u017een\u00fdch na Waylande. V nov\u00fdch verzi\u00e1ch bolo odstr\u00e1nen\u00fdch 9 zranite\u013enost\u00ed. Niektor\u00e9 zranite\u013enosti m\u00f4\u017eu potenci\u00e1lne vies\u0165 k eskal\u00e1cii pr\u00e1vomoc\u00ed v syst\u00e9moch, kde X-server be\u017e\u00ed s pr\u00e1vami root, ako aj k vzdialen\u00e9mu vykonaniu k\u00f3du v konfigur\u00e1ci\u00e1ch, kde zabezpe\u010den\u00fd pr\u00edstup vyu\u017e\u00edva presmerovanie rel\u00e1cie X11 cez SSH. <\/p>\n<p>Opraven\u00e9 zranite\u013enosti (CVE identifik\u00e1tory neboli pridelen\u00e9): <\/p>\n<ul>\n<li class=\"l\"> Prete\u010denie vyrovn\u00e1vacej pam\u00e4te pri spracovan\u00ed alternat\u00edvnych n\u00e1zvov p\u00edsiem. Probl\u00e9m je sp\u00f4soben\u00fd r\u00f4znymi obmedzeniami na ve\u013ekos\u0165 n\u00e1zvu p\u00edsma v kni\u017enici libXfont2 a X-serveri \u2014 <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sk\/server\/\" title=\"server\" data-wpil-keyword-link=\"linked\">server<\/a> vy\u010dlenil 256 bajtov na n\u00e1zov, pri\u010dom kni\u017enica umo\u017e\u0148ovala prenos n\u00e1zvov ve\u013ek\u00fdch a\u017e 1024 bajtov.\n<li class=\"l\">  Pr\u00edstup k pam\u00e4ti po jej uvo\u013enen\u00ed v funkci\u00e1ch miSyncDestroyFence(), FreeCounter() a SyncChangeCounter() v d\u00f4sledku ch\u00fdb pri aktualiz\u00e1cii po\u010d\u00edtadiel referenci\u00ed.\n<li class=\"l\"> Prete\u010denie vyrovn\u00e1vacej pam\u00e4te pri spracovan\u00ed ur\u010dit\u00fdch typov kl\u00e1vesov v XKB. Probl\u00e9m vznik\u00e1 z nespr\u00e1vneho v\u00fdpo\u010dtu ve\u013ekosti tabu\u013eky k\u00f3dov symbolov.\n<li class=\"l\"> Prete\u010denie vyrovn\u00e1vacej pam\u00e4te v XKB, ku ktor\u00e9mu doch\u00e1dza pri spracov\u00e1van\u00ed po\u017eiadaviek SetMap z d\u00f4vodu nedostato\u010dn\u00e9ho overenia ve\u013ekosti predan\u00fdch \u00fadajov klientom.\n<li class=\"l\"> Z\u00e1pis a \u010d\u00edtanie \u00fadajov mimo hranice vyrovn\u00e1vacej pam\u00e4te v GLX z d\u00f4vodu nespr\u00e1vneho overovania ve\u013ekosti \u00fadajov prij\u00edman\u00fdch od u\u017e\u00edvate\u013ea v funkcii ChangeDrawableAttributes.\n<li class=\"l\"> Pr\u00edstup k pam\u00e4ti po jej uvo\u013enen\u00ed, ktor\u00fd nast\u00e1va po zmene atrib\u00fatov okna a vyn\u00fatenom vyvolan\u00ed ochrany obrazovky. Probl\u00e9m m\u00f4\u017ee vies\u0165 k \u00faniku obsahu z pam\u00e4te procesu.\n<li class=\"l\"> Z\u00e1pis do pam\u00e4te mimo vyhraden\u00e9ho vyrovn\u00e1vacej pam\u00e4te v DRI2 funkci\u00e1ch DRIGetBuffers a DRIGetBuffersWithFormat, ku ktor\u00e9mu doch\u00e1dza pri po\u017eiadavke na viacero in\u0161tanci\u00ed DRI2BufferBackLeft, ale jednej in\u0161tancii DRI2BufferFrontLeft.<br \/>\n<br \/>Zdroj: <a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=65600\">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 \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 X.Org Server 21.1.23 \u0438 DDX-\u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0430 (Device-Dependent X) xwayland 24.1.12, \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0432\u0430\u044e\u0449\u0435\u0433\u043e \u0437\u0430\u043f\u0443\u0441\u043a X.Org Server \u0434\u043b\u044f \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f X11-\u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u0432 \u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u044f\u0445 \u043d\u0430 \u0431\u0430\u0437\u0435 Wayland. \u0412 \u043d\u043e\u0432\u044b\u0445 \u0432\u0435\u0440\u0441\u0438\u044f\u0445 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b 9 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439. \u041d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043c\u043e\u0433\u0443\u0442 \u0431\u044b\u0442\u044c \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u044b \u0434\u043b\u044f \u043f\u043e\u0432\u044b\u0448\u0435\u043d\u0438\u044f \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0439 \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 X-\u0441\u0435\u0440\u0432\u0435\u0440 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0435\u0442\u0441\u044f \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 root, \u0430 \u0442\u0430\u043a\u0436\u0435 \u0434\u043b\u044f \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u0433\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043a\u043e\u0434\u0430 [&hellip;]<\/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-181859","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 X.Org Server 21.1.23 \u0438 DDX-\u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0430 (Device-Dependent X) xwayland 24.1.12, \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0432\u0430\u044e\u0449\u0435\u0433\u043e \u0437\u0430\u043f\u0443\u0441\u043a X.Org Server \u0434\u043b\u044f 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