{"id":111085,"date":"2023-10-25T09:10:21","date_gmt":"2023-10-25T07:10:21","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/obnovlenie-x-org-server-21-1-9-i-xwayland-23-2-2-s-ustraneniem-uyazvimostej"},"modified":"2023-10-25T09:10:21","modified_gmt":"2023-10-25T07:10:21","slug":"obnovlenie-x-org-server-21-1-9-i-xwayland-23-2-2-s-ustraneniem-uyazvimostej","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/obnovlenie-x-org-server-21-1-9-i-xwayland-23-2-2-s-ustraneniem-uyazvimostej","title":{"rendered":"Aggiornamento di X.Org Server 21.1.9 e xwayland 23.2.2 con correzione di vulnerabilit\u00e0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Sono state pubblicate le versioni correttive di X.Org Server 21.1.9 e del componente DDX (Device-Dependent X) xwayland 22.2.2, che consente l'esecuzione di X.Org Server per l'organizzazione dell'esecuzione di applicazioni X11 in ambienti basati su Wayland. Nelle nuove versioni sono state corrette le vulnerabilit\u00e0 che potrebbero essere sfruttate per un'elevazione dei privilegi nei sistemi in cui il server X viene eseguito con diritti root, oltre che per l'esecuzione remota di codice in configurazioni in cui viene utilizzato il reindirizzamento della sessione X11 tramite SSH.       <\/p>\n<p>Problemi riscontrati:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2023-5367 \u2014 overflow del buffer nelle funzioni XIChangeDeviceProperty e RRChangeOutputProperty, che pu\u00f2 essere sfruttato tramite l'aggiunta di ulteriori elementi alla propriet\u00e0 del dispositivo di input o alla propriet\u00e0 randr. La vulnerabilit\u00e0 si manifesta a partire dalla versione xorg-server 1.4.0 (2007) ed \u00e8 causata dal calcolo di uno spostamento errato durante l'aggiunta di ulteriori elementi a propriet\u00e0 esistenti, per cui gli elementi vengono aggiunti con uno spostamento errato, provocando la scrittura in aree di memoria al di fuori del buffer allocato. Ad esempio, se vengono aggiunti 3 elementi a 5 esistenti, verr\u00e0 allocata memoria per un array di 8 elementi, ma gli elementi esistenti verranno mantenuti nel nuovo array a partire dall'indice 5 e non dal 3, il che porter\u00e0 alla scrittura degli ultimi due elementi al di fuori del buffer.\n<li class=\"l\"> CVE-2023-5380 \u2014 accesso alla memoria dopo la sua liberazione (use-after-free) nella funzione DestroyWindow. Il problema pu\u00f2 essere sfruttato spostando il puntatore tra schermi in configurazioni multi-monitor in modalit\u00e0 zaphod, in cui per ogni monitor viene creato il proprio schermo, e richiamando la funzione di chiusura della finestra client. La vulnerabilit\u00e0 si manifesta a partire dalla versione xorg-server 1.7.0 (2009) ed \u00e8 causata dal fatto che, dopo la chiusura di una finestra e la liberazione della memoria ad essa associata, nella struttura che gestisce il collegamento allo schermo rimane un puntatore attivo alla finestra precedente. Xwayland non \u00e8 vulnerabile a questa vulnerabilit\u00e0.\n<li class=\"l\"> CVE-2023-5574 \u2014 accesso alla memoria dopo la sua liberazione (use-after-free) nella funzione DamageDestroy. La vulnerabilit\u00e0 pu\u00f2 essere sfruttata in <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/it\/server\/dts-newyork\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2753\">server<\/a> Xvfb \u00e8 in fase di pulizia della struttura ScreenRec durante l'arresto del server o la disconnessione dell'ultimo cliente. Come per la vulnerabilit\u00e0 precedente, il problema si manifesta solo nelle configurazioni multi-monitor in modalit\u00e0 Zaphod. La vulnerabilit\u00e0 \u00e8 presente a partire dalla versione xorg-server-1.13.0 (2012) e rimane irrisolta (la correzione \u00e8 disponibile solo come patch).  <\/ul>\n<p>Oltre a risolvere le vulnerabilit\u00e0 in xwayland 23.2.2, \u00e8 stato effettuato il passaggio dalla libreria libbsd-overlay a libbsd e interrotto il collegamento automatico all'interfaccia RemoteDesktop XDG Desktop Portal per determinare il socket utilizzato per l'invio ai composti <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/it\/server\/dts-shicago\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2929\">server<\/a> eventi XTest. La connessione automatica creava problemi durante l'avvio di Xwayland in un server composito nidificato, quindi nella nuova versione \u00e8 necessario specificare esplicitamente l'opzione \u00ab-enable-ei-portal\u00bb per connettersi al portal.<br \/>\n<br \/>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=59991\">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 21.1.9 \u0438 DDX-\u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0430 (Device-Dependent X) xwayland 22.2.2, \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 \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 \u043a\u043e\u043d\u0444\u0438\u0433\u0443\u0440\u0430\u0446\u0438\u044f\u0445, [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-111085","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" 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