{"id":111480,"date":"2023-11-13T15:10:13","date_gmt":"2023-11-13T13:10:13","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimosti-v-openvpn-i-softether-vpn"},"modified":"2023-11-13T15:10:13","modified_gmt":"2023-11-13T13:10:13","slug":"uyazvimosti-v-openvpn-i-softether-vpn","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/uyazvimosti-v-openvpn-i-softether-vpn","title":{"rendered":"Vulnerabilit\u00e0 in OpenVPN e SoftEther VPN","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>\u00c8 stata rilasciata la versione OpenVPN 2.6.7, un pacchetto per la creazione di reti private virtuali che consente di stabilire una connessione crittografata tra due macchine client o di attivare un server VPN centralizzato per consentire il lavoro contemporaneo di pi\u00f9 client. Nella nuova versione sono state corrette due vulnerabilit\u00e0:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2023-46850 \u2014 l'accesso alla memoria dopo la sua liberazione (use-after-free) pu\u00f2 portare all'invio di contenuti della memoria del processo a un'altra parte della connessione e potenzialmente all'esecuzione di codice remoto. Il problema si manifesta in configurazioni che utilizzano TLS (eseguite senza il parametro \u00ab--secret\u00bb).\n<li class=\"l\"> CVE-2023-46849 \u2014 si pu\u00f2 verificare una condizione di divisione per zero che potrebbe portare a un crash remoto del server di accesso in configurazioni che utilizzano l'opzione \u00ab--fragment\u00bb.    <\/ul>\n<p>Tra le modifiche non relative alla sicurezza in OpenVPN 2.6.7:  <\/p>\n<ul>\n<li class=\"l\"> \u00c8 stato aggiunto un avviso durante l'invio da parte di un'altra parte di pacchetti DATA_V1 quando un client OpenVPN 2.6.x tenta di connettersi a server incompatibili basati su versioni 2.4.0-2.4.4 (per risolvere l'incompatibilit\u00e0, \u00e8 possibile utilizzare l'opzione \u00ab--disable-dco\u00bb).\n<li class=\"l\"> \u00c8 stato rimosso il vecchio metodo legato a OpenSSL 1.x che utilizza OpenSSL Engine per il caricamento delle chiavi. La ragione \u00e8 stata la riluttanza dell'autore a ri-licenziare il codice con le nuove eccezioni di binding.\n<li class=\"l\"> \u00c8 stato aggiunto un avviso durante la connessione di un client p2p NCP a <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/it\/server\/dts-shicago\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2912\">server<\/a> p2mp (una combinazione utilizzata per il funzionamento senza negoziazione dei cipher), poich\u00e9 ci sono problemi nell'utilizzo delle versioni 2.6.x su entrambe le estremit\u00e0 della connessione.\n<li class=\"l\"> \u00c8 stato aggiunto un avviso che il flag \u00ab--show-groups\u00bb non visualizza tutti i gruppi supportati.\n<li class=\"l\"> Nell'opzione \u00ab--dns\u00bb \u00e8 stata rimossa la gestione dell'argomento \u00abexclude-domains\u00bb, introdotto nella versione 2.6, ma attualmente non supportato dai backend.\n<li class=\"l\"> \u00c8 stato aggiunto un avviso che viene mostrato se il messaggio di controllo INFO ha dimensioni eccessive e non pu\u00f2 essere reindirizzato al client.\n<li class=\"l\"> Per le build utilizzando MinGW e MSVC \u00e8 stata aggiunta la supporto per il sistema di build CMake. \u00c8 stata rimossa la supporto per il vecchio sistema di build MSVC.  <\/ul>\n<p>Inoltre, sono state rilevate 9 vulnerabilit\u00e0 nel server pubblico <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/it\/vpn\/\"   title=\"VPN\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"213\">VPN<\/a>-server SoftEther. A una delle vulnerabilit\u00e0 (CVE-2023-27395) \u00e8 stato assegnato un livello critico di gravit\u00e0 \u2014 la vulnerabilit\u00e0 \u00e8 causata da un overflow del buffer e pu\u00f2 portare all'esecuzione remota di codice sul lato client durante il tentativo di connessione a un server controllato da un attaccante. La vulnerabilit\u00e0 \u00e8 stata risolta nell'aggiornamento di giugno di SoftEther VPN 4.42 Build 9798 RTM. Altre due vulnerabilit\u00e0 (CVE-2023-32634, CVE-2023-27516) consentono l'accesso non autorizzato a una sessione VPN durante un attacco MITM tramite l'uso di credenziali predefinite per il server RPC. Le vulnerabilit\u00e0 sono state risolte sotto forma di patch.    <\/p>\n<p>Le vulnerabilit\u00e0 CVE-2023-31192 e CVE-2023-32275 (patch) possono portare a una fuga di informazioni riservate in alcuni pacchetti a seguito di attacchi MITM. Le restanti 4 vulnerabilit\u00e0 (CVE-2023-22325, CVE-2023-23581, CVE-2023-22308 e CVE-2023-25774) possono essere sfruttate per causare indisponibilit\u00e0, come la disconnessione forzata o l'arresto anomalo del client. Recentemente \u00e8 stato anche accettato nella base di codice di SoftEther VPN un fix per 7 vulnerabilit\u00e0, i dettagli delle quali non sono ancora disponibili.<br \/>\n<br \/>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=60103\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043b\u0435\u043d \u0432\u044b\u043f\u0443\u0441\u043a OpenVPN 2.6.7, \u043f\u0430\u043a\u0435\u0442\u0430 \u0434\u043b\u044f \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u0432\u0438\u0440\u0442\u0443\u0430\u043b\u044c\u043d\u044b\u0445 \u0447\u0430\u0441\u0442\u043d\u044b\u0445 \u0441\u0435\u0442\u0435\u0439, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0433\u043e \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u0448\u0438\u0444\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0435 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 \u043c\u0435\u0436\u0434\u0443 \u0434\u0432\u0443\u043c\u044f \u043a\u043b\u0438\u0435\u043d\u0442\u0441\u043a\u0438\u043c\u0438 \u043c\u0430\u0448\u0438\u043d\u0430\u043c\u0438 \u0438\u043b\u0438 \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0442\u044c \u0440\u0430\u0431\u043e\u0442\u0443 \u0446\u0435\u043d\u0442\u0440\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e VPN-\u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u0434\u043b\u044f \u043e\u0434\u043d\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439 \u0440\u0430\u0431\u043e\u0442\u044b \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u0438\u0445 \u043a\u043b\u0438\u0435\u043d\u0442\u043e\u0432. \u0412 \u043d\u043e\u0432\u043e\u0439 \u0432\u0435\u0440\u0441\u0438\u0438 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0434\u0432\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438: CVE-2023-46850 &#8212; \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u0435 \u043a \u043e\u0431\u043b\u0430\u0441\u0442\u0438 \u043f\u0430\u043c\u044f\u0442\u0438 \u043f\u043e\u0441\u043b\u0435 \u0435\u0451 \u043e\u0441\u0432\u043e\u0431\u043e\u0436\u0434\u0435\u043d\u0438\u044f (use-after-free) \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0435 \u043d\u0430 \u0434\u0440\u0443\u0433\u0443\u044e \u0441\u0442\u043e\u0440\u043e\u043d\u0443 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u044f \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0433\u043e \u043f\u0430\u043c\u044f\u0442\u0438 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\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-111480","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.0.1 - 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