{"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\/cs\/blog\/news\/obnovlenie-x-org-server-21-1-23-s-ustraneniem-9-uyazvimostej","title":{"rendered":"Aktualizace X.Org Server 21.1.23 s odstran\u011bn\u00edm 9 zranitelnost\u00ed","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Byly zve\u0159ejn\u011bny opravy pro X.Org Server 21.1.23 a DDX komponent (Device-Dependent X) xwayland 24.1.12, kter\u00e9 zaji\u0161\u0165uj\u00ed spu\u0161t\u011bn\u00ed X.Org Serveru pro provoz X11 aplikac\u00ed v prost\u0159ed\u00edch zalo\u017een\u00fdch na Waylandu. V nov\u00fdch verz\u00edch bylo odstran\u011bno 9 zranitelnost\u00ed. N\u011bkter\u00e9 zranitelnosti mohou b\u00fdt potenci\u00e1ln\u011b zneu\u017eity k zv\u00fd\u0161en\u00ed opr\u00e1vn\u011bn\u00ed v syst\u00e9mech, kde je X-server spu\u0161t\u011bn s pr\u00e1vy root, stejn\u011b jako k vzd\u00e1len\u00e9mu spu\u0161t\u011bn\u00ed k\u00f3du v konfigurac\u00edch, kde se pro p\u0159\u00edstup pou\u017e\u00edv\u00e1 p\u0159esm\u011brov\u00e1n\u00ed X11 sezen\u00ed pomoc\u00ed SSH. <\/p>\n<p>Opraven\u00e9 zranitelnosti (CVE identifik\u00e1tory nejsou p\u0159i\u0159azeny): <\/p>\n<ul>\n<li class=\"l\"> P\u0159ete\u010den\u00ed bufferu p\u0159i zpracov\u00e1n\u00ed alternativn\u00edch n\u00e1zv\u016f p\u00edsem. Probl\u00e9m zp\u016fsobuj\u00ed r\u016fzn\u00e1 omezen\u00ed na dobu velikosti n\u00e1zvu p\u00edsma v knihovn\u011b libXfont2 a X-serveru \u2014 <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/cs\/server\/\" title=\"server\" data-wpil-keyword-link=\"linked\">server<\/a> alokoval 256 bajt\u016f pro n\u00e1zev, zat\u00edmco knihovna umo\u017e\u0148ovala p\u0159enos n\u00e1zv\u016f velikosti a\u017e 1024 bajt\u016f.\n<li class=\"l\">  P\u0159\u00edstupy k pam\u011bti po jej\u00edm uvoln\u011bn\u00ed ve funkc\u00edch miSyncDestroyFence(), FreeCounter() a SyncChangeCounter() kv\u016fli chyb\u00e1m aktualizace \u010d\u00edta\u010d\u016f referenc\u00ed.\n<li class=\"l\"> P\u0159ete\u010den\u00ed bufferu p\u0159i zpracov\u00e1n\u00ed ur\u010dit\u00fdch typ\u016f kl\u00e1ves v XKB. Probl\u00e9m vznik\u00e1 v d\u016fsledku nespr\u00e1vn\u00e9ho v\u00fdpo\u010dtu velikosti tabulky k\u00f3d\u016f znak\u016f.\n<li class=\"l\"> P\u0159ete\u010den\u00ed bufferu v XKB, kter\u00e9 vznik\u00e1 p\u0159i zpracov\u00e1n\u00ed \u017e\u00e1dost\u00ed SetMap kv\u016fli nedostate\u010dn\u00e9 kontrole velikosti p\u0159edan\u00fdch dat od klienta.\n<li class=\"l\"> Z\u00e1pis a \u010dten\u00ed dat za hranice vyhrazen\u00e9ho bufferu v GLX kv\u016fli nespr\u00e1vn\u00e9 kontrole velikosti atribut\u016f z\u00edsk\u00e1van\u00fdch od u\u017eivatele ve funkci ChangeDrawableAttributes.\n<li class=\"l\"> P\u0159\u00edstup k pam\u011bti po jej\u00edm uvoln\u011bn\u00ed, kter\u00fd nast\u00e1v\u00e1 po zm\u011bn\u011b atribut\u016f okna a vynucen\u00e9m vyvol\u00e1n\u00ed spo\u0159i\u010de obrazovky. Probl\u00e9m m\u016f\u017ee v\u00e9st k \u00faniku obsahu z pam\u011bti procesu.\n<li class=\"l\"> Z\u00e1pis do pam\u011bti mimo vyhrazen\u00fd buffer v DRI2 funkc\u00edch DRIGetBuffers a DRIGetBuffersWithFormat, kter\u00e9 vznik\u00e1 p\u0159i po\u017eadavku na v\u00edce instanc\u00ed DRI2BufferBackLeft, ale jedn\u00e9 instanci 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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