{"id":170353,"date":"2026-05-04T12:24:42","date_gmt":"2026-05-04T10:24:42","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-dropbear-ssh-2026-90-s-ustraneniem-uyazvimostej"},"modified":"2026-05-04T12:24:42","modified_gmt":"2026-05-04T10:24:42","slug":"vypusk-dropbear-ssh-2026-90-s-ustraneniem-uyazvimostej","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/vypusk-dropbear-ssh-2026-90-s-ustraneniem-uyazvimostej","title":{"rendered":"Wydanie Dropbear SSH 2026.90 z poprawkami luk bezpiecze\u0144stwa.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Opublikowano wydanie projektu Dropbear 2026.90, rozwijaj\u0105cego serwer i klienta SSH, kt\u00f3ry zyska\u0142 popularno\u015b\u0107 w bezprzewodowych routerach i kompaktowych dystrybucjach, takich jak OpenWrt. Dropbear wyr\u00f3\u017cnia si\u0119 niskim zu\u017cyciem pami\u0119ci, mo\u017cliwo\u015bci\u0105 wy\u0142\u0105czenia zb\u0119dnej funkcjonalno\u015bci podczas kompilacji oraz wsparciem dla budowy klienta i serwera w jednym pliku wykonywalnym, podobnie jak busybox. Przy statycznym linkowaniu z uClibc, plik wykonywalny Dropbear zajmuje zaledwie 110kB. Dropbear wspiera przekierowanie X11, jest zgodny z plikiem kluczy OpenSSH (~\/.ssh\/authorized_keys) i mo\u017ce tworzy\u0107 po\u0142\u0105czenia wielow\u0105tkowe z przekazywaniem przez host tranzytowy. Kod projektu zosta\u0142 napisany w j\u0119zyku C i jest dystrybuowany na licencji zbli\u017conej do MIT.      <\/p>\n<p>W nowej wersji naprawiono kilka problem\u00f3w z bezpiecze\u0144stwem:  <\/p>\n<ul>\n<li class=\"l\"> Niekompletne usuni\u0119cie w scp luki (CVE-2019-6111), pozwalaj\u0105cej na nadpisywanie innych plik\u00f3w przy po\u0142\u0105czeniu z z\u0142o\u015bliwym <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pl\/server\/dts-shicago\/\" title=\"serwera\" data-wpil-keyword-link=\"linked\">serwera<\/a>. Podczas u\u017cywania scp <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pl\/server\/\"   title=\"serwer\" data-wpil-keyword-link=\"linked\">serwer<\/a> podejmuje decyzj\u0119, kt\u00f3re pliki i katalogi wys\u0142a\u0107 do klienta, a klient jedynie sprawdza poprawno\u015b\u0107 zwr\u00f3conych nazw obiekt\u00f3w. Weryfikacja po stronie klienta blokuje wyj\u015bcie poza bie\u017c\u0105cy katalog (&#171;..&#187;), ale w przypadku rekurencyjnego kopiowania (-r) nie uwzgl\u0119dnia przypadk\u00f3w przesy\u0142ania katalog\u00f3w o nazwach r\u00f3\u017cni\u0105cych si\u0119 od pierwotnie \u017c\u0105danych. Problem rozwi\u0105zano poprzez zakaz u\u017cywania opcji &#171;-r&#187; z ju\u017c istniej\u0105cym katalogiem docelowym.\n<li class=\"l\"> Luka (CVE-2026-35385) w narz\u0119dziu scp, w wyniku kt\u00f3rej po przes\u0142aniu pliku z uprawnieniami root przy u\u017cyciu opcji &#171;-O&#187; i bez opcji &#171;-p&#187; nie by\u0142y czyszczone flagi setuid\/setgid.\n<li class=\"l\"> Mo\u017cliwo\u015b\u0107 obej\u015bcia wykonania polecenia &#171;forced_command&#187; w ustawieniach authorized_keys podczas \u0142\u0105czenia uwierzytelnionego u\u017cytkownika z u\u017cyciem opcji &#171;-t&#187; (logowanie z weryfikacj\u0105 has\u0142a i klucza publicznego).\n<li class=\"l\"> Odmowa obs\u0142ugi przez stworzenie przez lokalnego u\u017cytkownika pliku specjalnego o nazwie authorized_keys, blokuj\u0105cego operacje czytania.\n<li class=\"l\"> Odczyt danych z obszaru poza buforem przy tworzeniu handler\u00f3w przekierowania zapyta\u0144 klienta i serwera, co mo\u017ce prowadzi\u0107 do zamkni\u0119cia dowolnych deskryptor\u00f3w plik\u00f3w.    <\/ul>\n<p>Zmiany niezwi\u0105zane z bezpiecze\u0144stwem:  <\/p>\n<ul>\n<li class=\"l\"> W ssh dodano opcj\u0119 &#171;-R&#187; do przesy\u0142ania gniazd unix przez tunel SSH.\n<li class=\"l\"> W ssd dodano opcj\u0119 &#171;-M&#187; do ograniczenia maksymalnego czasu trwania sesji.\n<li class=\"l\"> W &#171;authorized_keys&#187; dodano opcj\u0119 &#171;permitlisten&#187; do ograniczenia dozwolonych port\u00f3w.\n<li class=\"l\"> Wsparcie dla kluczy RSA utworzonych w dropbearkey 0.32 lub wcze\u015bniejszych wersjach tego narz\u0119dzia, podatnych na ataki po\u015brednie oceniaj\u0105ce r\u00f3\u017cnic\u0119 w czasie przetwarzania danych trafiaj\u0105cych i nie trafiaj\u0105cych do pami\u0119ci podr\u0119cznej, zosta\u0142o zako\u0144czone.\n<li class=\"l\"> Aby zablokowa\u0107 ataki maj\u0105ce na celu prze\u0142amanie otwartych kluczy na hostach, liczba zapyta\u0144 o otwarte klucze jest ograniczona do 15 pr\u00f3b na sesj\u0119.        <\/ul>\n<p>\u0179r\u00f3d\u0142o: <a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=65356\">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 \u0432\u044b\u043f\u0443\u0441\u043a \u043f\u0440\u043e\u0435\u043a\u0442\u0430 Dropbear 2026.90, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u044e\u0449\u0435\u0433\u043e \u0441\u0435\u0440\u0432\u0435\u0440 \u0438 \u043a\u043b\u0438\u0435\u043d\u0442 SSH, \u043f\u043e\u043b\u0443\u0447\u0438\u0432\u0448\u0438\u0439 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435 \u0432 \u0431\u0435\u0441\u043f\u0440\u043e\u0432\u043e\u0434\u043d\u044b\u0445 \u043c\u0430\u0440\u0448\u0440\u0443\u0442\u0438\u0437\u0430\u0442\u043e\u0440\u0430\u0445 \u0438 \u043a\u043e\u043c\u043f\u0430\u043a\u0442\u043d\u044b\u0445 \u0434\u0438\u0441\u0442\u0440\u0438\u0431\u0443\u0442\u0438\u0432\u0430\u0445, \u043f\u043e\u0434\u043e\u0431\u043d\u044b\u0445 OpenWrt. Dropbear \u043e\u0442\u043b\u0438\u0447\u0430\u0435\u0442\u0441\u044f \u043d\u0438\u0437\u043a\u0438\u043c \u043f\u043e\u0442\u0440\u0435\u0431\u043b\u0435\u043d\u0438\u0435\u043c \u043f\u0430\u043c\u044f\u0442\u0438, \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c\u044e \u043e\u0442\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u043b\u0438\u0448\u043d\u0435\u0439 \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u043d\u0430 \u044d\u0442\u0430\u043f\u0435 \u0441\u0431\u043e\u0440\u043a\u0438 \u0438 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u043e\u0439 \u0441\u0431\u043e\u0440\u043a\u0438 \u043a\u043b\u0438\u0435\u043d\u0442\u0430 \u0438 \u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u0432 \u043e\u0434\u043d\u043e\u043c \u0438\u0441\u043f\u043e\u043b\u043d\u044f\u0435\u043c\u043e\u043c \u0444\u0430\u0439\u043b\u0435 \u043f\u043e \u0430\u043d\u0430\u043b\u043e\u0433\u0438\u0438 \u0441 busybox. \u041f\u0440\u0438 \u0441\u0442\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u043c \u0441\u0432\u044f\u0437\u044b\u0432\u0430\u043d\u0438\u0438 \u0441 uClibc \u0438\u0441\u043f\u043e\u043b\u043d\u044f\u0435\u043c\u044b\u0439 \u0444\u0430\u0439\u043b Dropbear \u0437\u0430\u043d\u0438\u043c\u0430\u0435\u0442 [&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-170353","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 \u0432\u044b\u043f\u0443\u0441\u043a \u043f\u0440\u043e\u0435\u043a\u0442\u0430 Dropbear 2026.90, 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OpenWrt.","canonical_url":"https:\/\/prohoster.info\/pl\/blog\/news\/vypusk-dropbear-ssh-2026-90-s-ustraneniem-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\u0412\u044b\u043f\u0443\u0441\u043a Dropbear SSH 2026.90 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c \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 \u0432\u044b\u043f\u0443\u0441\u043a \u043f\u0440\u043e\u0435\u043a\u0442\u0430 Dropbear 2026.90, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u044e\u0449\u0435\u0433\u043e \u0441\u0435\u0440\u0432\u0435\u0440 \u0438 \u043a\u043b\u0438\u0435\u043d\u0442 SSH, \u043f\u043e\u043b\u0443\u0447\u0438\u0432\u0448\u0438\u0439 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435 \u0432 \u0431\u0435\u0441\u043f\u0440\u043e\u0432\u043e\u0434\u043d\u044b\u0445 \u043c\u0430\u0440\u0448\u0440\u0443\u0442\u0438\u0437\u0430\u0442\u043e\u0440\u0430\u0445 \u0438 \u043a\u043e\u043c\u043f\u0430\u043a\u0442\u043d\u044b\u0445 \u0434\u0438\u0441\u0442\u0440\u0438\u0431\u0443\u0442\u0438\u0432\u0430\u0445, \u043f\u043e\u0434\u043e\u0431\u043d\u044b\u0445 OpenWrt.","og:url":"https:\/\/prohoster.info\/pl\/blog\/news\/vypusk-dropbear-ssh-2026-90-s-ustraneniem-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":"2026-05-04T10:24:42+00:00","article:modified_time":"2026-05-04T10:24:42+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":[],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/posts\/170353","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\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/comments?post=170353"}],"version-history":[{"count":2,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/posts\/170353\/revisions"}],"predecessor-version":[{"id":173160,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/posts\/170353\/revisions\/173160"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/media?parent=170353"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/categories?post=170353"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/tags?post=170353"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}