{"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\/pt\/blog\/news\/obnovlenie-x-org-server-21-1-23-s-ustraneniem-9-uyazvimostej","title":{"rendered":"Atualiza\u00e7\u00e3o do X.Org Server 21.1.23 corrigindo 9 vulnerabilidades","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Foram lan\u00e7adas atualiza\u00e7\u00f5es corretivas do X.Org Server 21.1.23 e do componente DDX (Device-Dependent X) xwayland 24.1.12, que possibilitam a execu\u00e7\u00e3o do X.Org Server para a organiza\u00e7\u00e3o da execu\u00e7\u00e3o de aplica\u00e7\u00f5es X11 em ambientes baseados em Wayland. As novas vers\u00f5es corrigem 9 vulnerabilidades. Algumas vulnerabilidades podem ser potencialmente exploradas para eleva\u00e7\u00e3o de privil\u00e9gios em sistemas onde o servidor X \u00e9 executado com privil\u00e9gios de root, bem como para execu\u00e7\u00e3o remota de c\u00f3digo em configura\u00e7\u00f5es onde o acesso \u00e9 feito atrav\u00e9s de redirecionamento de sess\u00e3o X11 via SSH. <\/p>\n<p>Vulnerabilidades corrigidas (identificadores CVE n\u00e3o designados): <\/p>\n<ul>\n<li class=\"l\"> Estouro de buffer ao processar nomes de fonte alternativos. O problema \u00e9 causado por diferentes restri\u00e7\u00f5es no tamanho do nome da fonte na biblioteca libXfont2 e no servidor X \u2014 <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pt\/server\/\" title=\"servidor\" data-wpil-keyword-link=\"linked\">servidor<\/a> reservava 256 bytes para o nome, enquanto a biblioteca permitia a transmiss\u00e3o de nomes de at\u00e9 1024 bytes.\n<li class=\"l\">  Acessos \u00e0 mem\u00f3ria ap\u00f3s libera\u00e7\u00e3o nas fun\u00e7\u00f5es miSyncDestroyFence(), FreeCounter() e SyncChangeCounter() devido a erros na atualiza\u00e7\u00e3o de contadores de refer\u00eancia.\n<li class=\"l\"> Buffer overflow ao processar certos tipos de teclas no XKB. O problema surge devido \u00e0 computa\u00e7\u00e3o incorreta do tamanho da tabela de c\u00f3digos de caracteres.\n<li class=\"l\"> Buffer overflow no XKB, que ocorre ao processar solicita\u00e7\u00f5es SetMap devido \u00e0 falta de valida\u00e7\u00e3o adequada do tamanho dos dados transmitidos pelo cliente.\n<li class=\"l\"> Leitura e grava\u00e7\u00e3o de dados fora da \u00e1rea do buffer no GLX devido \u00e0 valida\u00e7\u00e3o inadequada do tamanho dos atributos recebidos do usu\u00e1rio na fun\u00e7\u00e3o ChangeDrawableAttributes.\n<li class=\"l\"> Acesso \u00e0 mem\u00f3ria ap\u00f3s a libera\u00e7\u00e3o, que ocorre ap\u00f3s a altera\u00e7\u00e3o de atributos da janela e a chamada for\u00e7ada do protetor de tela. O problema pode levar ao vazamento de conte\u00fado da mem\u00f3ria do processo.\n<li class=\"l\"> Grava\u00e7\u00e3o na mem\u00f3ria al\u00e9m do buffer alocado nas fun\u00e7\u00f5es DRI2 DRIGetBuffers e DRIGetBuffersWithFormat, que ocorre ao solicitar v\u00e1rias inst\u00e2ncias de DRI2BufferBackLeft, mas apenas uma inst\u00e2ncia de DRI2BufferFrontLeft.<br \/>\n<br \/>Fonte: <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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