{"id":114795,"date":"2024-04-05T00:25:42","date_gmt":"2024-04-04T22:25:42","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/obnovlenie-x-org-server-21-1-12-s-ustraneniem-4-uyazvimostej"},"modified":"2024-04-05T00:25:42","modified_gmt":"2024-04-04T22:25:42","slug":"obnovlenie-x-org-server-21-1-12-s-ustraneniem-4-uyazvimostej","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/obnovlenie-x-org-server-21-1-12-s-ustraneniem-4-uyazvimostej","title":{"rendered":"Aktualizacja serwera X.Org 21.1.12 usuwaj\u0105ca 4 luki w zabezpieczeniach","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Opublikowano poprawki do X.Org Server 21.1.12 oraz komponentu DDX (Device-Dependent X) xwayland 23.2.5, kt\u00f3ry umo\u017cliwia uruchamianie X.Org Server w celu realizacji aplikacji X11 w \u015brodowiskach opartych na Wayland. W nowej wersji X.Org Server usuni\u0119to 4 luki bezpiecze\u0144stwa. Jedna z luk mo\u017ce by\u0107 wykorzystana do podniesienia uprawnie\u0144 w systemach, w kt\u00f3rych serwer X dzia\u0142a z uprawnieniami roota, a tak\u017ce do zdalnego wykonania kodu w konfiguracjach, w kt\u00f3rych dost\u0119p uzyskuje si\u0119 poprzez przekierowanie sesji X11 za pomoc\u0105 SSH.       <\/p>\n<p>Pozosta\u0142e trzy luki mog\u0105 prowadzi\u0107 do wycieku zawarto\u015bci pami\u0119ci <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pl\/server\/dts-los-angeles\/\"   title=\"serwera\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3610\">serwera<\/a> lub do awaryjnego zako\u0144czenia pracy. Te trzy luki s\u0105 wykorzystywane przez wykorzystanie na stronie klienta innego porz\u0105dku bajt\u00f3w ni\u017c w <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pl\/server\/dts-dronten\/\"   title=\"serwerze\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2580\">serwerze<\/a>. W zwi\u0105zku z tym w nowej wersji wprowadzono mo\u017cliwo\u015b\u0107 zablokowania po\u0142\u0105cze\u0144 z klientami z system\u00f3w o innym porz\u0105dku bajt\u00f3w. Mo\u017cna to wy\u0142\u0105czy\u0107 za pomoc\u0105 parametru konfiguracyjnego &#171;AllowByteSwappedClients&#187; lub opcji linii polece\u0144 &#171;+byteswappedclients&#187;.    <\/p>\n<p>Zmiana warto\u015bci domy\u015blnej pozwala zabezpieczy\u0107 si\u0119 przed potencjalnie nieujawnionymi lukami, kt\u00f3re manipuluj\u0105 porz\u0105dkiem bajt\u00f3w. Istota takich luk polega na tym, \u017ce zmiana porz\u0105dku bajt\u00f3w dla warto\u015bci o okre\u015blonym rozmiarze prowadzi do ich b\u0142\u0119dnej interpretacji i do odczytu lub zapisu do pami\u0119ci oczywi\u015bcie wi\u0119kszej wielko\u015bci ni\u017c wskazywany bufor.    <\/p>\n<p>Na razie domy\u015blnie zachowana jest obs\u0142uga klient\u00f3w z innym porz\u0105dkiem bajt\u00f3w, mimo \u017ce w praktyce konwersja porz\u0105dku bajt\u00f3w w ostatnim czasie jest niezwykle rzadko stosowana, poniewa\u017c stacje robocze, na kt\u00f3rych uruchamiany jest serwer X, s\u0105 zazwyczaj wyposa\u017cone w procesory o porz\u0105dku bajt\u00f3w little-endian (od najm\u0142odszego do najstarszego bajtu) i po\u0142\u0105czenie z nimi klient\u00f3w X o porz\u0105dku big-endian, takich jak platforma s390x (IBM zSystems), jest du\u017c\u0105 rzadko\u015bci\u0105.       <\/p>\n<p>Zidentyfikowane problemy:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2024-31080, CVE-2024-31081, CVE-2024-31082 \u2014 odczyt danych z obszaru poza buforem poprzez manipulacje funkcjami ProcXIGetSelectedEvents, ProcXIPassiveGrabDevice i ProcAppleDRICreatePixmap, kt\u00f3re wykorzystuj\u0105 pole o rozmiarze nie uwzgl\u0119dniaj\u0105cym kolejno\u015bci bajt\u00f3w w warto\u015bci przekazanej przez klienta. W zwi\u0105zku z tym, przy r\u00f3\u017cnicach w kolejno\u015bci bajt\u00f3w mi\u0119dzy klientem a serwerem, funkcje te zwracaj\u0105 klientowi wi\u0119cej danych. Dwie pierwsze problemy pojawiaj\u0105 si\u0119 od wydania xorg-server-1.7.0 (2009 rok), a trzeci \u2014 od xorg-server-1.15.0 (2012 rok).\n<li class=\"l\"> CVE-2024-31083 \u2014 odwo\u0142anie do ju\u017c zwolnionej pami\u0119ci (User-after-free) w funkcji ProcRenderAddGlyphs, kt\u00f3ra wywo\u0142uje funkcj\u0119 AllocateGlyph() w celu zapisu nowych glif\u00f3w przekazanych przez klienta. Funkcja AllocateGlyph() zwraca nowy glif z zerowym licznikiem referencji (refcount=0), a ponowne wskazanie glifu nie prowadzi do zwi\u0119kszenia licznika referencji, przez co tablica glyph_new mo\u017ce zawiera\u0107 kilka wpis\u00f3w wskazuj\u0105cych na jeden glif bez licznika referencji. Przy zwolnieniu pami\u0119ci przez funkcj\u0119 ProcRenderAddGlyphs() dla glifu, w tablicy pozostaje i mo\u017ce by\u0107 u\u017cyty zb\u0119dny wska\u017anik do glifu, pami\u0119\u0107 dla kt\u00f3rego zosta\u0142a ju\u017c zwolniona. Problem wyst\u0119puje w serwerze X.Org i nie dotyczy xwayland.        <\/ul>\n<p>\u0179r\u00f3d\u0142o: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=60927\">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 21.1.12 \u0438 DDX-\u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0430 (Device-Dependent X) xwayland 23.2.5, \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\u043e\u0439 \u0432\u0435\u0440\u0441\u0438\u0438 X.Org Server \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b 4 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438. \u041e\u0434\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0430 \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 [&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-114795","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\" 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 21.1.12 \u0438 DDX-\u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0430 (Device-Dependent X) xwayland 23.2.5, \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.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/pl\/blog\/news\/obnovlenie-x-org-server-21-1-12-s-ustraneniem-4-uyazvimostej\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.1.1\" \/>\n\t\t<meta property=\"og:locale\" content=\"pl_PL\" \/>\n\t\t<meta property=\"og:site_name\" content=\"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\ud83e\udd47\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 X.Org Server 21.1.12 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c 4 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 | ProHoster\" \/>\n\t\t<meta property=\"og: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 21.1.12 \u0438 DDX-\u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0430 (Device-Dependent X) xwayland 23.2.5, \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.\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/prohoster.info\/pl\/blog\/news\/obnovlenie-x-org-server-21-1-12-s-ustraneniem-4-uyazvimostej\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:width\" content=\"350\" \/>\n\t\t<meta property=\"og:image:height\" content=\"350\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2024-04-04T22:25:42+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2024-04-04T22:25:42+00:00\" \/>\n\t\t<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"\ud83e\udd47Aktualizacja X.Org Server 21.1.12 z poprawk\u0105 4 luk bezpiecze\u0144stwa | ProHoster","description":"Opublikowane poprawki X.Org Server 21.1.12 oraz komponentu DDX (Device-Dependent X) xwayland 23.2.5, umo\u017cliwiaj\u0105cego uruchamianie X.Org Server w celu realizacji X11 aplikacji w \u015brodowiskach opartych na.","canonical_url":"https:\/\/prohoster.info\/pl\/blog\/news\/obnovlenie-x-org-server-21-1-12-s-ustraneniem-4-uyazvimostej","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"pl_PL","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 X.Org Server 21.1.12 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c 4 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 | ProHoster","og:description":"\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 21.1.12 \u0438 DDX-\u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0430 (Device-Dependent X) xwayland 23.2.5, \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.","og:url":"https:\/\/prohoster.info\/pl\/blog\/news\/obnovlenie-x-org-server-21-1-12-s-ustraneniem-4-uyazvimostej","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2024-04-04T22:25:42+00:00","article:modified_time":"2024-04-04T22:25:42+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"114795","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"seo_analyzer_scan_date":"2026-02-22 15:41:47","breadcrumb_settings":null,"limit_modified_date":false,"reviewed_by":null,"ai":null,"created":"2026-01-22 21:25:22","updated":"2026-02-22 15:41:47","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/posts\/114795","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/comments?post=114795"}],"version-history":[{"count":2,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/posts\/114795\/revisions"}],"predecessor-version":[{"id":162137,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/posts\/114795\/revisions\/162137"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/media?parent=114795"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/categories?post=114795"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/tags?post=114795"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}