{"id":102262,"date":"2021-11-10T21:36:39","date_gmt":"2021-11-10T19:36:39","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-samba-ustraneno-8-opasnyh-uyazvimostej"},"modified":"2021-11-10T21:36:39","modified_gmt":"2021-11-10T19:36:39","slug":"v-samba-ustraneno-8-opasnyh-uyazvimostej","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/v-samba-ustraneno-8-opasnyh-uyazvimostej","title":{"rendered":"In Samba risolte 8 vulnerabilit\u00e0 critiche","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Sono stati rilasciati aggiornamenti correttivi per Samba versioni 4.15.2, 4.14.10 e 4.13.14, risolvendo 8 vulnerabilit\u00e0, la maggior parte delle quali potrebbero portare a una completa compromissione del dominio Active Directory. \u00c8 notevole che uno dei problemi fosse stato corretto dal 2016 e cinque risalgono al 2020; tuttavia, una correzione ha causato l'impossibilit\u00e0 di avviare winbindd con la configurazione \u2018allow trusted domains = no\u2019 (gli sviluppatori intendono pubblicare tempestivamente un ulteriore aggiornamento con la correzione). Gli aggiornamenti dei pacchetti possono essere seguiti sulle seguenti pagine: Debian, Ubuntu, RHEL, SUSE, Fedora, Arch, FreeBSD.    <\/p>\n<p>Vulnerabilit\u00e0 risolte:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2020-25717 \u2014 a causa di una carenza nella logica di mappatura degli utenti del dominio con gli utenti del sistema locale, un utente del dominio Active Directory che ha la possibilit\u00e0 di creare nuovi account sul proprio sistema, gestiti tramite ms-DS-MachineAccountQuota, potrebbe ottenere accesso con diritti root su altri sistemi partecipanti a <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/it\/domain\/\"   title=\"dominio\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"4094\">dominio<\/a>.\n<li class=\"l\"> CVE-2021-3738 \u2014 accesso a un'area di memoria gi\u00e0 liberata (Use after free) nell'implementazione del server RPC Samba AD DC (dsdb), che potrebbe potenzialmente portare a un aumento dei privilegi durante la manipolazione della connessione.\n<li class=\"l\"> CVE-2016-2124 \u2014 le connessioni client stabilite utilizzando il protocollo SMB1 potrebbero essere convertite per trasmettere i parametri di autenticazione in chiaro o tramite NTLM (ad esempio, per raccogliere credenziali durante attacchi MITM), anche se per l'utente o l'applicazione \u00e8 specificata l'autenticazione obbligatoria tramite Kerberos.\n<li class=\"l\"> CVE-2020-25722 \u2014 nel controller di dominio Active Directory basato su Samba non venivano effettuati adeguati controlli di accesso ai dati memorizzati, consentendo a qualsiasi utente di aggirare i controlli delle autorizzazioni e compromettere completamente il dominio.\n<li class=\"l\"> CVE-2020-25718 \u2014 nel controller di dominio Active Directory basato su Samba i ticket di Kerberos rilasciati da RODC (Read-only domain controller) non venivano correttamente isolati, il che potrebbe essere sfruttato per ottenere ticket da amministratore da un RODC senza possedere le autorizzazioni necessarie.\n<li class=\"l\"> CVE-2020-25719 \u2014 il controller di dominio Active Directory basato su Samba non considerava sempre il campo SID e PAC nelle ticket Kerberos (con l'impostazione \u00abgensec:require_pac = true\u00bb veniva controllato solo il nome, mentre il PAC non veniva preso in considerazione), consentendo a un utente con diritti di creazione di account sul sistema locale di impersonare un altro utente nel dominio, compresi quelli privilegiati.\n<li class=\"l\"> CVE-2020-25721 \u2014 per gli utenti autenticati tramite Kerberos, non venivano sempre forniti identificatori univoci per Active Directory (objectSid), il che poteva portare a sovrapposizioni tra un utente e un altro.\n<li class=\"l\"> CVE-2021-23192 \u2014 durante un attacco MITM, esisteva la possibilit\u00e0 di manomissione di frammenti in grandi richieste DCE\/RPC, suddivise in pi\u00f9 parti.  <\/ul>\n<p>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=56132\">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 4.15.2, 4.14.10 \u0438 4.13.14 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c 8 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u0431\u043e\u043b\u044c\u0448\u0438\u043d\u0441\u0442\u0432\u043e \u0438\u0437 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043c\u043e\u0433\u0443\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u043f\u043e\u043b\u043d\u043e\u0439 \u043a\u043e\u043c\u043f\u0440\u043e\u043c\u0435\u0442\u0430\u0446\u0438\u0438 \u0434\u043e\u043c\u0435\u043d\u0430 Active Directory. \u041f\u0440\u0438\u043c\u0435\u0447\u0430\u0442\u0435\u043b\u044c\u043d\u043e, \u0447\u0442\u043e \u043e\u0434\u043d\u0443 \u0438\u0437 \u043f\u0440\u043e\u0431\u043b\u0435\u043c \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u044f\u043b\u0438 \u0441 2016 \u0433\u043e\u0434\u0430, \u0430 \u043f\u044f\u0442\u044c &#8212; \u0441 2020 \u0433\u043e\u0434\u0430, \u0442\u0435\u043c \u043d\u0435 \u043c\u0435\u043d\u0435\u0435 \u043e\u0434\u043d\u043e \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u0438\u0432\u0435\u043b\u043e \u043a \u043d\u0435\u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0438 \u0437\u0430\u043f\u0443\u0441\u0442\u0438\u0442\u044c winbindd \u043f\u0440\u0438 \u043d\u0430\u043b\u0438\u0447\u0438\u0438 \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438 &#171;allow trusted domains [&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-102262","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 \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 4.15.2, 4.14.10 \u0438 4.13.14 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c 8 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u0431\u043e\u043b\u044c\u0448\u0438\u043d\u0441\u0442\u0432\u043e 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