{"id":104724,"date":"2022-07-28T15:36:38","date_gmt":"2022-07-28T13:36:38","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-samba-pozvolyayushhaya-pomenyat-parol-lyubomu-polzovatelyu"},"modified":"2022-07-28T15:36:38","modified_gmt":"2022-07-28T13:36:38","slug":"uyazvimost-v-samba-pozvolyayushhaya-pomenyat-parol-lyubomu-polzovatelyu","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/uyazvimost-v-samba-pozvolyayushhaya-pomenyat-parol-lyubomu-polzovatelyu","title":{"rendered":"Luka w Sambie, pozwalaj\u0105ca ka\u017cdemu u\u017cytkownikowi zmieni\u0107 has\u0142o","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Opublikowano skorygowane wersje pakietu Samba 4.16.4, 4.15.9 i 4.14.14, eliminuj\u0105ce 5 luk bezpiecze\u0144stwa. Wydania aktualizacji pakiet\u00f3w w dystrybucjach mo\u017cna \u015bledzi\u0107 na stronach: Debian, Ubuntu, RHEL, SUSE, Arch, FreeBSD.    <\/p>\n<p>Najbardziej niebezpieczna luka (CVE-2022-32744) umo\u017cliwia u\u017cytkownikom domeny Active Directory zmian\u0119 has\u0142a dowolnego u\u017cytkownika, w tym r\u00f3wnie\u017c has\u0142a administratora, co pozwala na pe\u0142n\u0105 kontrol\u0119 nad domen\u0105. Problem wynika z faktu, \u017ce KDC akceptuje \u017c\u0105dania kpasswd zaszyfrowane dowolnym znanym kluczem.     <\/p>\n<p>Napastnik, maj\u0105cy dost\u0119p do  <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pl\/domain\/\"   title=\"domeny\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1234\">domeny<\/a>, mo\u017ce wys\u0142a\u0107 fa\u0142szywe \u017c\u0105danie resetowania has\u0142a w imieniu innego u\u017cytkownika, szyfruj\u0105c je swoim kluczem, a KDC przetworzy je bez weryfikacji zgodno\u015bci klucza konta. W tym celu do wysy\u0142ania fa\u0142szywych \u017c\u0105da\u0144 mog\u0105 by\u0107 u\u017cywane klucze kontroler\u00f3w domeny dzia\u0142aj\u0105cych w trybie tylko do odczytu (RODC), kt\u00f3re nie maj\u0105 uprawnie\u0144 do zmiany hase\u0142. Jako obej\u015bcie ochrony mo\u017cna wy\u0142\u0105czy\u0107 wsparcie dla protoko\u0142u kpasswd, dodaj\u0105c do smb.conf lini\u0119 &#171;kpasswd port = 0&#187;.    <\/p>\n<p>Inne podatno\u015bci:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2022-32746 &#8212; u\u017cytkownicy Active Directory mog\u0105 inicjowa\u0107 dost\u0119p do pami\u0119ci po jej zwolnieniu (use-after-free) poprzez wysy\u0142anie specjalnie sformatowanych zapyta\u0144 LDAP &#171;add&#187; lub &#171;modify&#187; w procesie serwera. Problem spowodowany jest tym, \u017ce modu\u0142 do prowadzenia log\u00f3w audytowych odnosi si\u0119 do zawarto\u015bci komunikatu LDAP po tym, jak modu\u0142 obs\u0142ugi bazy danych zwalnia pami\u0119\u0107 przeznaczon\u0105 dla komunikatu. Do przeprowadzenia ataku konieczne jest posiadanie uprawnie\u0144 do dodawania lub modyfikacji niekt\u00f3rych uprzywilejowanych atrybut\u00f3w, takich jak userAccountControl.\n<li class=\"l\"> CVE-2022-2031 &#8212; u\u017cytkownicy Active Directory mog\u0105 obej\u015b\u0107 niekt\u00f3re ograniczenia w kontrolerze domeny. KDC i us\u0142uga kpasswd maj\u0105 mo\u017cliwo\u015b\u0107 deszyfrowania bilet\u00f3w nawzajem, poniewa\u017c wsp\u00f3lnie korzystaj\u0105 z tego samego zestawu kluczy i kont. W zwi\u0105zku z tym u\u017cytkownik, kt\u00f3ry za\u017c\u0105da\u0142 zmiany has\u0142a, mo\u017ce u\u017cy\u0107 otrzymanego biletu do uzyskania dost\u0119pu do innych us\u0142ug.\n<li class=\"l\"> CVE-2022-32745 &#8212; u\u017cytkownicy Active Directory mog\u0105 spowodowa\u0107 awari\u0119 procesu serwera przez wysy\u0142anie zapyta\u0144 LDAP &#171;add&#187; lub &#171;modify&#187;, prowadz\u0105cych do dost\u0119pu do niezinicjowanych danych.\n<li class=\"l\"> CVE-2022-32742 &#8212; wyciek informacji o 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=\"3841\">serwera<\/a> poprzez manipulacje protoko\u0142em SMB1. Klient SMB1, maj\u0105cy prawo do zapisu w wsp\u00f3lnym folderze, mo\u017ce stworzy\u0107 warunki do zapisania fragment\u00f3w zawarto\u015bci pami\u0119ci procesu serwera w pliku lub wys\u0142ania ich na drukark\u0119. Atak wykonuje si\u0119 przez wys\u0142anie \u017c\u0105dania &#171;write&#187; z podaniem nieprawid\u0142owego zakresu. Problem dotyczy wy\u0142\u0105cznie ga\u0142\u0119zi Samba do wersji 4.11 (w ga\u0142\u0119zi 4.11 wsparcie dla SMB1 jest domy\u015blnie wy\u0142\u0105czone).                 <\/ul>\n<p>\u0179r\u00f3d\u0142o: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=57565\">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 \u043f\u0430\u043a\u0435\u0442\u0430 Samba 4.16.4, 4.15.9 \u0438 4.14.14 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c 5 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439. \u0412\u044b\u043f\u0443\u0441\u043a \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0439 \u043f\u0430\u043a\u0435\u0442\u043e\u0432 \u0432 \u0434\u0438\u0441\u0442\u0440\u0438\u0431\u0443\u0442\u0438\u0432\u0430\u0445 \u043c\u043e\u0436\u043d\u043e \u043f\u0440\u043e\u0441\u043b\u0435\u0434\u0438\u0442\u044c \u043d\u0430 \u0441\u0442\u0440\u0430\u043d\u0438\u0446\u0430\u0445: Debian, Ubuntu, RHEL, SUSE, Arch, FreeBSD. \u041d\u0430\u0438\u0431\u043e\u043b\u0435\u0435 \u043e\u043f\u0430\u0441\u043d\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2022-32744) \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f\u043c \u0434\u043e\u043c\u0435\u043d\u0430 Active Directory \u0438\u0437\u043c\u0435\u043d\u0438\u0442\u044c \u043f\u0430\u0440\u043e\u043b\u044c \u043b\u044e\u0431\u043e\u0433\u043e \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f, \u0432 \u0442\u043e\u043c \u0447\u0438\u0441\u043b\u0435 \u043c\u043e\u0436\u043d\u043e \u0438\u0437\u043c\u0435\u043d\u0438\u0442\u044c \u043f\u0430\u0440\u043e\u043b\u044c \u0430\u0434\u043c\u0438\u043d\u0438\u0441\u0442\u0440\u0430\u0442\u043e\u0440\u0430 \u0438 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u043f\u043e\u043b\u043d\u044b\u0439 \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u044c \u043d\u0430\u0434 \u0434\u043e\u043c\u0435\u043d\u043e\u043c. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 [&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-104724","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 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