{"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\/da\/blog\/news\/uyazvimost-v-samba-pozvolyayushhaya-pomenyat-parol-lyubomu-polzovatelyu","title":{"rendered":"S\u00e5rbarhed i Samba, der tillader enhver bruger at \u00e6ndre adgangskoden","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Korrigerende udgivelser af Samba-pakkerne 4.16.4, 4.15.9 og 4.14.14 er offentliggjort, der l\u00f8ser 5 s\u00e5rbarheder. Udgivelser af pakkeforbedringer i distributioner kan f\u00f8lges p\u00e5 siderne: Debian, Ubuntu, RHEL, SUSE, Arch, FreeBSD.    <\/p>\n<p>Den mest alvorlige s\u00e5rbarhed (CVE-2022-32744) tillader brugere af Active Directory-dom\u00e6net at \u00e6ndre adgangskoden for enhver bruger, inklusive administratoradgangskoden, og dermed f\u00e5 fuld kontrol over dom\u00e6net. Problemet skyldes, at KDC accepterer kpasswd-anmodninger krypteret med en hvilken som helst kendt n\u00f8gle.     <\/p>\n<p>En angriber, der har adgang til  <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/da\/domain\/\"   title=\"dom\u00e6net\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1234\">dom\u00e6net<\/a>, kan sende en falsk anmodning om at \u00e6ndre adgangskoden p\u00e5 vegne af en anden bruger ved at kryptere den med sin egen n\u00f8gle, og KDC vil behandle den uden at kontrollere overensstemmelsen med kontoens n\u00f8gle. Falske anmodninger kan ogs\u00e5 anvende n\u00f8gler fra dom\u00e6nekontrollere, der kun k\u00f8rer i skrivebeskyttet tilstand (RODC), som ikke har bemyndigelse til at \u00e6ndre adgangskoder. En mulighed for at beskytte sig mod dette er at deaktivere underst\u00f8ttelse af kpasswd-protokollen ved at tilf\u00f8je linjen &#171;kpasswd port = 0&#187; til smb.conf.    <\/p>\n<p>Andre s\u00e5rbarheder:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2022-32746 \u2013 brugere af Active Directory kan ved at sende specielt formaterede LDAP-anmodninger &#171;add&#187; eller &#171;modify&#187; initiere en hukommelsesadgang efter frigivelse (use-after-free) i serverprocessen. Problemet opst\u00e5r, fordi audit-logmodulet tilg\u00e5r indholdet af LDAP-beskeden, efter at databasemodulet har frigivet den hukommelse, der er afsat til beskeden. For at udf\u00f8re angrebet kr\u00e6ves der rettigheder til at tilf\u00f8je eller \u00e6ndre visse privilegerede attributter, s\u00e5som userAccountControl.\n<li class=\"l\"> CVE-2022-2031 \u2013 brugere af Active Directory kan omg\u00e5 visse begr\u00e6nsninger i dom\u00e6nekontrolleren. KDC og kpasswd-tjenesten har mulighed for at dekryptere hinandens billetter, da de deler samme s\u00e6t n\u00f8gler og konti. Derfor kan en bruger, der har anmodet om at \u00e6ndre adgangskoden, bruge den modtagne billet til at f\u00e5 adgang til andre tjenester.\n<li class=\"l\"> CVE-2022-32745 \u2013 brugere af Active Directory kan for\u00e5rsage, at serverprocessen afsluttes uventet ved at sende LDAP-anmodninger &#171;add&#187; eller &#171;modify&#187;, som f\u00f8rer til adgang til uinitialiserede data.\n<li class=\"l\"> CVE-2022-32742 \u2013 l\u00e6kage af information om hukommelsens indhold <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/da\/server\/dts-los-angeles\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3841\">server<\/a> gennem manipulation af SMB1-protokollen. En SMB1-klient med skriveadgang til en delt mappe kan skabe betingelser for at skrive fragmenter af hukommelsens indhold fra serverprocessen til en fil eller sende det til en printer. Angrebet udf\u00f8res ved at sende en &#171;write&#187;-anmodning med et forkert interval. Problemet p\u00e5virker kun Samba-versioner f\u00f8r 4.11 (i version 4.11 er underst\u00f8ttelse af SMB1 som standard deaktiveret).                 <\/ul>\n<p>Kilde: <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 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b 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