{"id":182538,"date":"2026-07-08T10:54:06","date_gmt":"2026-07-08T08:54:06","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/obnovlenie-x-org-server-21-1-24-xwayland-24-1-13-i-libxfont2-2-0-8-s-ustraneniem-uyazvimostej"},"modified":"2026-07-08T10:54:06","modified_gmt":"2026-07-08T08:54:06","slug":"obnovlenie-x-org-server-21-1-24-xwayland-24-1-13-i-libxfont2-2-0-8-s-ustraneniem-uyazvimostej","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/news\/obnovlenie-x-org-server-21-1-24-xwayland-24-1-13-i-libxfont2-2-0-8-s-ustraneniem-uyazvimostej","title":{"rendered":"Actualizarea X.Org Server 21.1.24, xwayland 24.1.13 \u0219i libXfont2 2.0.8 cu remedieri pentru vulnerabilit\u0103\u021bi","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Au fost publicate versiunile corective ale X.Org Server 21.1.24 \u0219i ale componentei DDX (Device-Dependent X) xwayland 24.1.13, care faciliteaz\u0103 lansarea X.Org Server pentru rularea aplica\u021biilor X11 \u00een medii bazate pe Wayland. \u00cen noile versiuni au fost corectate 2 vulnerabilit\u0103\u021bi care ar putea fi exploatate pentru a ob\u021bine privilegii sporite \u00een sistemele \u00een care serverul X ruleaz\u0103 cu drepturi de root, precum \u0219i pentru executarea de cod de la distan\u021b\u0103 \u00een configura\u021bii \u00een care accesul se face prin redirec\u021bionarea sesiunii X11 utiliz\u00e2nd SSH.       <\/p>\n<p>Vulnerabilit\u0103\u021bi corectate:   <\/p>\n<ul>\n<li class=\"l\"> CVE-2026-55999 \u2014 overflow de buffer \u00een implementarea arhitecturii 2D-accelerate Glamor, afect\u00e2nd func\u021bia glamor_font_get(), care construie\u0219te un atlas de texturi de fonturi prin redarea fiec\u0103rui glyph \u00eentr-un buffer comun. Problema este cauzat\u0103 de faptul c\u0103 dimensiunea buffer-ului era determinat\u0103 pe baza parametrilor specifica\u021bi \u00een font, \u00een timp ce la crearea datelor copiate \u00een buffer au fost folosite metricile individuale ale fiec\u0103rui glyph. Pentru a exploata vulnerabilitatea, un atacator poate preg\u0103ti un fi\u0219ier format PCF special conceput, \u00een care metricile glyph-ului sunt incorecte, dep\u0103\u0219ind dimensiunea de memorie rezervat\u0103 pentru acestea. Overflow-ul apare pe sistemele care folosesc backend-ul glamor (Xorg cu driver modesetting \u0219i Xwayland) la redarea textului cu fontul problematic.\n<li class=\"l\"> CVE-2026-56000 \u2014 acces la memorie dup\u0103 ce aceasta a fost eliberat\u0103 \u00een func\u021bia CommonMakeCurrent() \u00een timpul proces\u0103rii contextTags GLX. Problema este cauzat\u0103 de faptul c\u0103, atunci c\u00e2nd se folose\u0219te func\u021bia realloc(), datele din array-ul cl-&gt;contextTags erau mutate \u00eentr-un buffer nou, dar un pointer referitor la bufferul vechi r\u0103m\u00e2nea utilizat. Pentru a ini\u021bia mutarea buffer-ului, clientul putea ocupa toate elementele array-ului rezervate pentru contextul GLX, dup\u0103 care putea crea un alt context suplimentar.       <\/ul>\n<p>De asemenea, se remarc\u0103 lansarea bibliotecii libXfont 2.0.8, utilizat\u0103 \u00een serverul X. \u00cen aceast\u0103 actualizare au fost corectate 3 vulnerabilit\u0103\u021bi (CVE-2026-56001, CVE-2026-56002, CVE-2026-56003), care duc la dep\u0103\u0219irea bufferului \u00een timpul analizei fonturilor formatate special \u00een format PCF.<br \/>\n<br \/>Sursa: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=65863\">opennet.ro<\/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 21.1.24 \u0438 DDX-\u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0430 (Device-Dependent X) xwayland 24.1.13, \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 2 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \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 \u0432 [&hellip;]<\/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-182538","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2.1 - 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 21.1.24 \u0438 DDX-\u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0430 (Device-Dependent X) xwayland 24.1.13, \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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