Na zes maanden ontwikkeling is de release van OpenSSH 8.9 gepresenteerd, een open implementatie van de client en server voor gebruik via de SSH 2.0- en SFTP-protocollen. In de nieuwe versie is een kwetsbaarheid in sshd verholpen, die mogelijk toegang zonder authenticatie kan verlenen. Dit probleem wordt veroorzaakt door een integer overflow in de authenticatiecode, maar misbruik is alleen mogelijk in combinatie met andere logische fouten in de code. <\/p>\n
In de huidige situatie is de kwetsbaarheid niet uit te buiten wanneer de privilege-scheiding is ingeschakeld, omdat de manifestatie ervan wordt geblokkeerd door afzonderlijke controles die in de code van de privilege-scheiding worden uitgevoerd. De privilege-scheiding is sinds 2002 standaard ingeschakeld, beginnend met OpenSSH 3.2.2, en is verplicht sinds de release van OpenSSH 7.5, die in 2017 is gepubliceerd. Bovendien wordt in draagbare versies van OpenSSH, beginnend met release 6.5 (2014), de kwetsbaarheid geblokkeerd door te compileren met inschakeling van flags ter bescherming tegen integer overflows. <\/p>\n
Andere wijzigingen: <\/p>\n
In one of the upcoming releases, it is planned to default the scp utility to use SFTP instead of the outdated SCP\/RCP protocol. SFTP employs more predictable methods for handling names and does not use shell-based glob pattern processing in file names on the other host, which creates security issues. Specifically, when using SCP and RCP, the server decides which files and directories to send to the client, and the client only verifies the correctness of the returned object names, which allows, in the absence of proper checks on the client side, to transfer other file names that differ from those requested. server<\/a> verander andere bestandsnamen dan de aangevraagde. Het SFTP-protocol heeft deze problemen niet, maar ondersteunt geen speciale paden, zoals \u00ab~\/\u00bb. Om dit onderscheid te verhelpen, is in de vorige versie van OpenSSH een nieuwe protocoluitbreiding voor SFTP-serverimplementatie voorgesteld voor het onthullen van paden ~\/ en ~user\/. \u041f\u043e\u0441\u043b\u0435 \u0448\u0435\u0441\u0442\u0438 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u0440\u0435\u043b\u0438\u0437 OpenSSH 8.9, \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u0439 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u043a\u043b\u0438\u0435\u043d\u0442\u0430 \u0438 \u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u0434\u043b\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u043f\u043e \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430\u043c SSH 2.0 \u0438 SFTP. \u0412 \u043d\u043e\u0432\u043e\u0439 \u0432\u0435\u0440\u0441\u0438\u0438 \u0432 sshd \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c, \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u0434\u043e\u0441\u0442\u0443\u043f \u0431\u0435\u0437 \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u0446\u0435\u043b\u043e\u0447\u0438\u0441\u043b\u0435\u043d\u043d\u044b\u043c \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435\u043c \u0432 \u043a\u043e\u0434\u0435 \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438, \u043d\u043e \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044f \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u0430 \u0442\u043e\u043b\u044c\u043a\u043e \u0432 \u0441\u043e\u0447\u0435\u0442\u0430\u043d\u0438\u0438 \u0441 \u0434\u0440\u0443\u0433\u0438\u043c\u0438 \u043b\u043e\u0433\u0438\u0447\u0435\u0441\u043a\u0438\u043c\u0438 \u043e\u0448\u0438\u0431\u043a\u0430\u043c\u0438 \u0432 \u043a\u043e\u0434\u0435. \u0412 \u0442\u0435\u043a\u0443\u0449\u0435\u043c […]<\/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-103424","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\udd47Release of OpenSSH 8.9 with vulnerability fix in sshd | ProHoster","description":"After six months of development, the release of OpenSSH 8.9 is presented, an open implementation 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Bron: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"