{"id":103738,"date":"2022-04-08T15:36:50","date_gmt":"2022-04-08T13:36:50","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/reliz-openssh-9-0-s-perevodom-scp-na-protokol-sftp"},"modified":"2022-04-08T15:36:50","modified_gmt":"2022-04-08T13:36:50","slug":"reliz-openssh-9-0-s-perevodom-scp-na-protokol-sftp","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/reliz-openssh-9-0-s-perevodom-scp-na-protokol-sftp","title":{"rendered":"Uscita di OpenSSH 9.0 con il trasferimento di scp al protocollo SFTP","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>\u00c8 stata rilasciata la versione 9.0 di OpenSSH, un'implementazione open source del client e server per lavorare con i protocolli SSH 2.0 e SFTP. Nella nuova versione, lo strumento scp \u00e8 stato impostato per utilizzare SFTP di default invece del protocollo obsoleto SCP\/RCP.       <\/p>\n<p>In SFTP vengono utilizzati metodi di gestione dei nomi pi\u00f9 prevedibili e non si utilizza l'elaborazione di modelli glob nei nomi dei file tramite shell su un altro host, il che crea problemi di sicurezza. In particolare, quando si utilizza SCP e RCP, il server decide quali file e directory inviare al client, e il client verifica solo la correttezza dei nomi degli oggetti restituiti, il che, in assenza di adeguati controlli sul lato client, consente <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/it\/server\/dts-shicago\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2910\">server<\/a> di trasmettere altri nomi di file diversi da quelli richiesti.     <\/p>\n<p>Il protocollo SFTP \u00e8 privo dei problemi indicati, ma non supporta l'espansione dei percorsi speciali come \u00ab~\/\u00bb. Per risolvere questa differenza, a partire da OpenSSH 8.7, nell'implementazione del server SFTP \u00e8 supportata l'estensione del protocollo \u00abexpand-path@openssh.com\u00bb per espandere i percorsi ~\/ e ~user\/.     <\/p>\n<p>Utilizzando SFTP, gli utenti possono anche incontrare incompatibilit\u00e0 causate dalla necessit\u00e0 di un doppio escaping dei caratteri speciali nella risoluzione dei percorsi nelle richieste SCP e RCP, per evitare che vengano interpretati dal lato remoto. In SFTP questo escaping non \u00e8 necessario e le virgolette in eccesso possono portare a errori di trasferimento. I sviluppatori di OpenSSH hanno deciso di non aggiungere un'estensione per riprodurre il comportamento di scp in questo caso, poich\u00e9 il doppio escaping \u00e8 considerato un difetto che non ha senso ripetere.    <\/p>\n<p>Altre modifiche nella nuova versione:  <\/p>\n<ul>\n<li class=\"l\"> In ssh e sshd \u00e8 abilitato per impostazione predefinita l'algoritmo ibrido di scambio delle chiavi \u00absntrup761x25519-sha512@openssh.com\u00bb (ECDH\/x25519 + NTRU Prime), resistente ai tentativi di attacco da parte di computer quantistici e combinato con ECDH\/x25519 per bloccare potenziali problemi in NTRU Prime che potrebbero emergere in futuro. Nell'elenco KexAlgorithms, che definisce l'ordine di selezione dei metodi di scambio delle chiavi, l'algoritmo citato \u00e8 ora messo al primo posto ed \u00e8 pi\u00f9 prioritario rispetto agli algoritmi ECDH e DH.\n<p>I computer quantistici non hanno ancora raggiunto un livello tale da consentire di violare le chiavi tradizionali, ma l'implementazione di una protezione ibrida permetter\u00e0 di proteggere gli utenti da attacchi che sfruttano sessioni SSH intercettate, nel calcolo che possano essere decifrate in futuro, quando saranno disponibili i necessari computer quantistici.    <\/p>\n<li class=\"l\"> Nello sftp-server \u00e8 stata aggiunta l'estensione \u00abcopy-data\u00bb, che consente di copiare dati lato server, senza l'invio transitorio al client, se il file sorgente e il file di destinazione si trovano sullo stesso. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/it\/server\/dts-newyork\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2706\">server<\/a>.\n<li class=\"l\"> Nell'utility sftp \u00e8 stata aggiunta la comando \u00abcp\u00bb per avviare da parte del client la copia dei file lato server.    <\/ul>\n<p>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=56991\">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 \u0440\u0435\u043b\u0438\u0437 OpenSSH 9.0, \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u0439 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u043a\u043b\u0438\u0435\u043d\u0442\u0430 \u0438 \u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u0434\u043b\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u043f\u043e \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430\u043c SSH 2.0 \u0438 SFTP. \u0412 \u043d\u043e\u0432\u043e\u0439 \u0432\u0435\u0440\u0441\u0438\u0438 \u0443\u0442\u0438\u043b\u0438\u0442\u0430 scp \u043f\u0435\u0440\u0435\u0432\u0435\u0434\u0435\u043d\u0430 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u043d\u0430 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 SFTP \u0432\u043c\u0435\u0441\u0442\u043e \u0443\u0441\u0442\u0430\u0440\u0435\u0432\u0448\u0435\u0433\u043e \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 SCP\/RCP. \u0412 SFTP \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u044e\u0442\u0441\u044f \u0431\u043e\u043b\u0435\u0435 \u043f\u0440\u0435\u0434\u0441\u043a\u0430\u0437\u0443\u0435\u043c\u044b\u0435 \u043c\u0435\u0442\u043e\u0434\u044b \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0438\u043c\u0451\u043d \u0438 \u043d\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0430 glob-\u0448\u0430\u0431\u043b\u043e\u043d\u043e\u0432 \u0432 \u0438\u043c\u0435\u043d\u0430\u0445 \u0444\u0430\u0439\u043b\u043e\u0432 \u0447\u0435\u0440\u0435\u0437 shell \u043d\u0430 \u0441\u0442\u043e\u0440\u043e\u043d\u0435 \u0434\u0440\u0443\u0433\u043e\u0433\u043e \u0445\u043e\u0441\u0442\u0430, \u0441\u043e\u0437\u0434\u0430\u044e\u0449\u0430\u044f [&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-103738","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=\"\u041f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u0440\u0435\u043b\u0438\u0437 OpenSSH 9.0, \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u0439 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 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