{"id":100517,"date":"2021-06-15T10:22:36","date_gmt":"2021-06-15T08:22:36","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-novoj-stabilnoj-vetki-tor-0-4-6"},"modified":"2021-06-15T10:22:36","modified_gmt":"2021-06-15T08:22:36","slug":"vypusk-novoj-stabilnoj-vetki-tor-0-4-6","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/vypusk-novoj-stabilnoj-vetki-tor-0-4-6","title":{"rendered":"Rilascio del nuovo ramo stabile Tor 0.4.6","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>\u00c8 stata rilasciata la versione 0.4.6.5 degli strumenti Tor, utilizzati per organizzare il funzionamento della rete anonima Tor. La versione 0.4.6.5 \u00e8 riconosciuta come il primo rilascio stabile della serie 0.4.6, che si \u00e8 sviluppata nell'ultimo cinque mesi. La serie 0.4.6 sar\u00e0 supportata nel ciclo di manutenzione standard \u2014 il rilascio di aggiornamenti sar\u00e0 interrotto dopo 9 mesi o 3 mesi dopo il rilascio della serie 0.4.7.x. Un ciclo di supporto a lungo termine (LTS) \u00e8 garantito per la serie 0.3.5, gli aggiornamenti della quale continueranno fino al 1 febbraio 2022. Contestualmente sono stati rilasciati le versioni Tor 0.3.5.15, 0.4.4.9 e 0.4.5.9, in cui sono state corrette vulnerabilit\u00e0 DoS che consentivano di provocare interruzioni nel servizio ai clienti dei servizi onion e dei relay.      <\/p>\n<p>Principali modifiche:  <\/p>\n<ul>\n<li class=\"l\"> \u00c8 stata aggiunta la possibilit\u00e0 di creare servizi onion basati sulla terza versione del protocollo con autenticazione degli accessi dei clienti tramite file nella directory 'authorized_clients'.\n<li class=\"l\"> Per i relay \u00e8 stato aggiunto un flag che consente all'operatore del nodo di capire che il relay non \u00e8 incluso nel consenso durante la selezione <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/it\/server\/dts-dusseldorf\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3444\">server<\/a> delle directory (ad esempio, quando ci sono troppi relay su un singolo indirizzo IP).\n<li class=\"l\"> \u00c8 stata garantita la possibilit\u00e0 di trasmettere informazioni sul sovraccarico nei dati extrainfo, che possono essere utilizzate per il bilanciamento del carico nella rete. La trasmissione della metrica \u00e8 controllata tramite l'opzione OverloadStatistics in torrc.\n<li class=\"l\"> Nel sottosistema di protezione contro gli attacchi DoS \u00e8 stata aggiunta la possibilit\u00e0 di limitare l'intensit\u00e0 delle connessioni dei clienti ai relay.\n<li class=\"l\"> Nei relay \u00e8 stata implementata la pubblicazione di statistiche sul numero di servizi onion basati sulla terza versione del protocollo e sul volume del loro traffico.\n<li class=\"l\"> Dalla codebase per i relay \u00e8 stata rimossa la supporto per l'opzione DirPorts, che non \u00e8 utilizzata per questo tipo di nodi.\n<li class=\"l\"> \u00c8 stata effettuata una rifattorizzazione del codice. Il sottosistema di protezione contro gli attacchi DoS \u00e8 stato spostato nel manager subsys.\n<li class=\"l\"> \u00c8 stata interrotta la supporto per i vecchi servizi onion basati sulla seconda versione del protocollo, dichiarato obsoleto un anno fa. Si prevede la rimozione totale del codice associato alla seconda versione del protocollo in autunno. La seconda versione del protocollo \u00e8 stata sviluppata circa 16 anni fa e non pu\u00f2 essere considerata sicura nelle condizioni attuali a causa dell'uso di algoritmi obsoleti. Due anni e mezzo fa, con il rilascio della versione 0.3.2.9, agli utenti \u00e8 stata proposta la terza versione del protocollo per i servizi onion, caratterizzata dall'adozione di indirizzi a 56 caratteri, una protezione pi\u00f9 robusta contro la fuga di dati attraverso <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/it\/server\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1917\">server<\/a> directory, una struttura modulare espandibile e l'utilizzo degli algoritmi SHA3, ed25519 e curve25519 invece di SHA1, DH e RSA-1024.\n<li class=\"l\"> Vulnerabilit\u00e0 risolte:\n<ul>\n<li class=\"l\"> CVE-2021-34550 \u2014 accesso a un'area di memoria al di fuori del buffer allocato nel codice per il parsing dei descrittori dei servizi onion basati sulla terza versione del protocollo. Un attaccante pu\u00f2, attraverso la creazione di un descrittore particolarmente formattato di un servizio onion, indurre il crash di qualsiasi cliente che tenti di accedere a questo servizio onion.\n<li class=\"l\"> CVE-2021-34549 \u2014 possibilit\u00e0 di eseguire un attacco per provocare un diniego di servizio sui relay. Un attaccante pu\u00f2 creare concatenazioni con identificatori che causano collisioni nella funzione di hash, il cui trattamento provoca un elevato carico sulla CPU.\n<li class=\"l\"> CVE-2021-34548 \u2014 un relay potrebbe eseguire lo spoofing delle celle RELAY_END e RELAY_RESOLVED in flussi parzialmente chiusi, consentendo di terminare il flusso creato senza la partecipazione di quel relay.\n<li class=\"l\"> TROVE-2021-004 \u2014 sono state aggiunte ulteriori verifiche sugli errori durante l'accesso al generatore di numeri casuali OpenSSL (con l'implementazione predefinita dell'RNG in OpenSSL, tali errori non si manifestano).                <\/ul>\n<p>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=55327\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u0432\u044b\u043f\u0443\u0441\u043a \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u044f Tor 0.4.6.5, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c\u043e\u0433\u043e \u0434\u043b\u044f \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0440\u0430\u0431\u043e\u0442\u044b \u0430\u043d\u043e\u043d\u0438\u043c\u043d\u043e\u0439 \u0441\u0435\u0442\u0438 Tor. \u0412\u0435\u0440\u0441\u0438\u044f Tor 0.4.6.5 \u043f\u0440\u0438\u0437\u043d\u0430\u043d\u0430 \u043f\u0435\u0440\u0432\u044b\u043c \u0441\u0442\u0430\u0431\u0438\u043b\u044c\u043d\u044b\u043c \u0432\u044b\u043f\u0443\u0441\u043a\u043e\u043c \u0432\u0435\u0442\u043a\u0438 0.4.6, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u043b\u0430\u0441\u044c \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0438\u0435 \u043f\u044f\u0442\u044c \u043c\u0435\u0441\u044f\u0446\u0435\u0432. \u0412\u0435\u0442\u043a\u0430 0.4.6 \u0431\u0443\u0434\u0435\u0442 \u0441\u043e\u043f\u0440\u043e\u0432\u043e\u0436\u0434\u0430\u0442\u044c\u0441\u044f \u0432 \u0440\u0430\u043c\u043a\u0430\u0445 \u0448\u0442\u0430\u0442\u043d\u043e\u0433\u043e \u0446\u0438\u043a\u043b\u0430 \u0441\u043e\u043f\u0440\u043e\u0432\u043e\u0436\u0434\u0435\u043d\u0438\u044f &#8212; \u0432\u044b\u043f\u0443\u0441\u043a \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0439 \u0431\u0443\u0434\u0435\u0442 \u043f\u0440\u0435\u043a\u0440\u0430\u0449\u0451\u043d \u0447\u0435\u0440\u0435\u0437 9 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \u0438\u043b\u0438 \u0447\u0435\u0440\u0435\u0437 3 \u043c\u0435\u0441\u044f\u0446\u0430 \u043f\u043e\u0441\u043b\u0435 \u0440\u0435\u043b\u0438\u0437\u0430 \u0432\u0435\u0442\u043a\u0438 0.4.7.x. \u0414\u043b\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439 \u0446\u0438\u043a\u043b \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438 (LTS) [&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-100517","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.0.1 - 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