{"id":104640,"date":"2022-07-12T21:36:50","date_gmt":"2022-07-12T19:36:50","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/obnovlenie-x-org-server-21-1-4-s-ustraneniem-uyazvimostej"},"modified":"2022-07-12T21:36:50","modified_gmt":"2022-07-12T19:36:50","slug":"obnovlenie-x-org-server-21-1-4-s-ustraneniem-uyazvimostej","status":"publish","type":"post","link":"https:\/\/prohoster.info\/nl\/blog\/news\/obnovlenie-x-org-server-21-1-4-s-ustraneniem-uyazvimostej","title":{"rendered":"X.Org Server 21.1.4-update met beveiligingsoplossingen","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Een correctieve release van X.Org Server 21.1.4 is beschikbaar, waarin twee kwetsbaarheden in de Xkb-extensiemodules zijn verholpen. Deze kwetsbaarheden maakten het mogelijk om privileges in het systeem te verhogen als de X-server met root-rechten draait, of om code op een externe systeem uit te voeren wanneer toegang wordt verkregen via sessie-omleiding van X11 via SSH. De kwetsbaarheden zijn veroorzaakt door een gebrek aan correcte controle van de grootte in de aanroepbehandelaars ProcXkbSetGeometry (CVE-2022-2319) en ProcXkbSetDeviceInfo (CVE-2022-2320), die kunnen worden ge\u00ebxploiteerd om te schrijven naar geheugen buiten de toegewezen buffer. <\/p>\n

In het geval van ProcXkbSetGeometry ontbrak de groottecontrole van de verzoekvelden, waardoor de klant een bufferoverloop kon veroorzaken door een aantal secties in de aanvraag op te geven dat niet overeenkwam met de daadwerkelijk verzonden gegevens. In de handler ProcXkbSetDeviceInfo werd de kwetsbaarheid veroorzaakt door de onjuiste volgorde van functieaanroepen \u2014 de functie voor parametercontrole werd aangeroepen na de functie waarin deze parameters werden gebruikt (de functienamen waren verwisseld en de functie XkbSetDeviceInfo bevatte de code voor controle, terwijl XkbSetDeviceInfoCheck verantwoordelijk was voor het instellen van waarden).
\n
Bron: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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ProcXkbSetGeometry (CVE-2022-2319) \u0438 […]<\/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-104640","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Update X.Org Server 21.1.4 met kwetsbaarheden verholpen | ProHoster","description":"Een correctieve release van X.Org Server 21.1.4 is beschikbaar, waarin twee kwetsbaarheden in de Xkb-extensiemodules zijn verholpen, waardoor een verhoging van privileges in het systeem mogelijk was als de X-server met root-rechten 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