{"id":101556,"date":"2021-10-06T16:22:48","date_gmt":"2021-10-06T14:22:48","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/stabilnyj-reliz-proksi-servera-squid-5"},"modified":"2021-10-06T16:22:48","modified_gmt":"2021-10-06T14:22:48","slug":"stabilnyj-reliz-proksi-servera-squid-5","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/stabilnyj-reliz-proksi-servera-squid-5","title":{"rendered":"Rilascio stabile del server proxy Squid 5","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Dopo tre anni di sviluppo, \u00e8 stata rilasciata la versione stabile del server proxy Squid 5.1, pronta per essere utilizzata nei sistemi operativi (le versioni 5.0.x avevano lo stato di beta). Dopo aver conferito alla linea 5.x lo stato di stabilit\u00e0, verranno effettuate solo correzioni di vulnerabilit\u00e0 e problemi di stabilit\u00e0, e saranno consentite anche piccole ottimizzazioni. Lo sviluppo di nuove funzionalit\u00e0 sar\u00e0 condotto in una nuova linea sperimentale 6.0. Si consiglia agli utenti della precedente versione stabile 4.x di pianificare il passaggio alla linea 5.x.       <\/p>\n<p>Novit\u00e0 principali di Squid 5:  <\/p>\n<ul>\n<li class=\"l\"> Nell'implementazione del protocollo ICAP (Internet Content Adaptation Protocol), usato per integrare sistemi esterni di verifica dei contenuti, \u00e8 stata aggiunta la supporto per il meccanismo di allegato dati (trailer), che consente di allegare intestazioni aggiuntive con metadati alla risposta, posizionate dopo il corpo del messaggio (ad esempio, \u00e8 possibile trasmettere un checksum e dettagli su eventuali problemi rilevati).\n<li class=\"l\"> Per il reindirizzamento delle richieste viene utilizzato l'algoritmo \u00abHappy Eyeballs\u00bb, che sfrutta immediatamente l'indirizzo IP ottenuto, senza attendere la risoluzione di tutti i potenziali indirizzi IPv4 e IPv6 disponibili. Invece di tenere conto dell'impostazione \u00abdns_v4_first\u00bb per determinare l'ordine di utilizzo del sistema di indirizzi IPv4 o IPv6, ora viene considerato l'ordine delle risposte DNS: se, durante l'attesa per la risoluzione, <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/it\/lir\/ipv4\/\"   title=\"Indirizzi IP\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"692\">Indirizzi IP<\/a> arriva per primo un messaggio DNS AAAA, verr\u00e0 utilizzato l'indirizzo IPv6 ottenuto. In questo modo, l'impostazione della famiglia di indirizzi preferita viene ora eseguita a livello di firewall, DNS o avviando con l'opzione \u00ab--disable-ipv6\u00bb. La modifica proposta consente di ridurre i tempi di instaurazione delle connessioni TCP e di minimizzare l'impatto delle latenze nella risoluzione DNS sulle prestazioni.\n<li class=\"l\"> \u00c8 stato aggiunto un gestore \u00abext_kerberos_sid_group_acl\u00bb per l'autenticazione con verifica dei gruppi in Active Directory tramite Kerberos nella direttiva \u00abexternal_acl\u00bb. Per la richiesta del nome del gruppo viene utilizzato lo strumento ldapsearch, fornito dal pacchetto OpenLDAP.\n<li class=\"l\"> \u041f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u0444\u043e\u0440\u043c\u0430\u0442\u0430 \u0411\u0414 Berkeley DB \u043e\u0431\u044a\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u0441\u0442\u0430\u0440\u0435\u0432\u0448\u0435\u0439 \u0438\u0437-\u0437\u0430  \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u043e\u043d\u043d\u044b\u0445 \u043f\u0440\u043e\u0431\u043b\u0435\u043c. \u0412\u0435\u0442\u043a\u0430 Berkeley DB 5.x \u0443\u0436\u0435 \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u043b\u0435\u0442 \u043d\u0435 \u0441\u043e\u043f\u0440\u043e\u0432\u043e\u0436\u0434\u0430\u0435\u0442\u0441\u044f \u0438 \u043e\u0441\u0442\u0430\u0451\u0442\u0441\u044f \u0441 \u043d\u0435\u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u043d\u044b\u043c\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044f\u043c\u0438, \u0430 \u043f\u0435\u0440\u0435\u0439\u0442\u0438 \u043d\u0430 \u0431\u043e\u043b\u0435\u0435 \u043d\u043e\u0432\u044b\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 \u043d\u0435 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0435 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0438  \u043d\u0430 AGPLv3, \u0442\u0440\u0435\u0431\u043e\u0432\u0430\u043d\u0438\u044f \u043a\u043e\u0442\u043e\u0440\u043e\u0439 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u044e\u0442\u0441\u044f \u0438 \u043d\u0430 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0449\u0438\u0435 BerkeleyDB \u0432 \u0444\u043e\u0440\u043c\u0435 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 &#8212; Squid \u043f\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 GPLv2, \u0430 AGPL \u043d\u0435\u0441\u043e\u0432\u043c\u0435\u0441\u0442\u0438\u043c\u0430 \u0441 GPLv2. \u0412\u043c\u0435\u0441\u0442\u043e  Berkeley DB \u043f\u0440\u043e\u0435\u043a\u0442 \u043f\u0435\u0440\u0435\u0432\u0435\u0434\u0451\u043d \u043d\u0430 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0421\u0423\u0411\u0414 TrivialDB, \u043a\u043e\u0442\u043e\u0440\u0430\u044f, \u0432 \u043e\u0442\u043b\u0438\u0447\u0438\u0435 \u043e\u0442 Berkeley DB, \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u0430 \u0434\u043b\u044f \u043e\u0434\u043d\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0433\u043e \u043f\u0430\u0440\u0430\u043b\u043b\u0435\u043b\u044c\u043d\u043e\u0433\u043e \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043a \u0411\u0414.  \u041f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430  Berkeley DB   \u043f\u043e\u043a\u0430 \u0441\u043e\u0445\u0440\u0430\u043d\u0435\u043d\u0430, \u043d\u043e \u0432 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0430\u0445 &#171;ext_session_acl&#187; \u0438 &#171;ext_time_quota_acl&#187;  \u0442\u0435\u043f\u0435\u0440\u044c \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0443\u0435\u0442\u0441\u044f \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0442\u0438\u043f \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0430 &#171;libtdb&#187; \u0432\u043c\u0435\u0441\u0442\u043e &#171;libdb&#187;.\n<li class=\"l\"> Aggiunto il supporto per l'intestazione HTTP CDN-Loop, definita nel RFC 8586, che consente di rilevare cicli durante l'uso di reti di distribuzione dei contenuti (l'intestazione fornisce protezione contro situazioni in cui una richiesta, durante la ridirezione tra CDN, per qualche motivo torna alla CDN originale, creando un ciclo infinito).\n<li class=\"l\"> Nel meccanismo SSL-Bump, che consente l'intercettazione del contenuto delle sessioni HTTPS crittografate, \u00e8 stata aggiunta la supporto per reindirizzare le richieste HTTPS modificate (ricrittografate) attraverso altri server proxy, come specificato in cache_peer, utilizzando un tunnel standard basato sul metodo HTTP CONNECT (la trasmissione tramite HTTPS non \u00e8 supportata, poich\u00e9 Squid non pu\u00f2 ancora trasferire TLS all'interno di TLS). SSL-Bump consente, all'arrivo della prima richiesta HTTPS intercettata, di stabilire una connessione TLS con il server di destinazione e di ottenere il suo certificato. Successivamente, Squid utilizza il nome host dal certificato reale ricevuto dal server e crea un certificato falso, mediante il quale simula il server richiesto durante l'interazione con il cliente, continuando a utilizzare per l'acquisizione dei dati la connessione TLS stabilita con il server di destinazione (per evitare che la sostituzione faccia apparire avvisi nei browser lato cliente, \u00e8 necessario aggiungere il proprio certificato, utilizzato per generare certificati falsi, al negozio di certificati radice).\n<li class=\"l\"> Sono state aggiunte le direttive mark_client_connection e mark_client_pack per l'associazione di etichette Netfilter (CONNMARK) alle connessioni TCP dei client o ai singoli pacchetti.      <\/ul>\n<p>A seguire, sono state pubblicate le versioni di Squid 5.2 e Squid 4.17 in cui sono state corrette le vulnerabilit\u00e0:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2021-28116 &#8212; \u0443\u0442\u0435\u0447\u043a\u0430 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438 \u043f\u0440\u0438 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0435 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u044b\u0445 \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u0439 WCCPv2. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0435\u043c\u0443 \u043f\u043e\u0432\u0440\u0435\u0434\u0438\u0442\u044c \u0441\u043f\u0438\u0441\u043e\u043a \u0438\u0437\u0432\u0435\u0441\u0442\u043d\u044b\u0445 \u043c\u0430\u0440\u0448\u0440\u0443\u0442\u0438\u0437\u0430\u0442\u043e\u0440\u043e\u0432 WCCP \u0438 \u043f\u0435\u0440\u0435\u043d\u0430\u043f\u0440\u0430\u0432\u0438\u0442\u044c \u0442\u0440\u0430\u0444\u0438\u043a \u043a\u043b\u0438\u0435\u043d\u0442\u043e\u0432 \u043f\u0440\u043e\u043a\u0441\u0438-\u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u043d\u0430 \u0441\u0432\u043e\u0439 \u0445\u043e\u0441\u0442. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0442\u043e\u043b\u044c\u043a\u043e \u0432 \u043a\u043e\u043d\u0444\u0438\u0433\u0443\u0440\u0430\u0446\u0438\u044f\u0445 \u0441 \u0432\u043a\u043b\u044e\u0447\u0451\u043d\u043d\u043e\u0439 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u043e\u0439 WCCPv2 \u0438 \u043f\u0440\u0438 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0438 \u043e\u0441\u0443\u0449\u0435\u0441\u0442\u0432\u043b\u0435\u043d\u0438\u044f \u0441\u043f\u0443\u0444\u0438\u043d\u0433\u0430 IP-\u0430\u0434\u0440\u0435\u0441\u0430 \u043c\u0430\u0440\u0448\u0440\u0443\u0442\u0438\u0437\u0430\u0442\u043e\u0440\u0430.\n<li class=\"l\"> CVE-2021-41611 \u2014 errore durante la verifica <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/it\/ssl-sertifikat\/\"   title=\"certificati TLS.\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"958\">certificati TLS.<\/a>, che consente l'accesso utilizzando certificati non affidabili.      <\/ul>\n<p>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=55929\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435 \u0442\u0440\u0451\u0445 \u043b\u0435\u0442 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u0441\u0442\u0430\u0431\u0438\u043b\u044c\u043d\u044b\u0439 \u0440\u0435\u043b\u0438\u0437 \u043f\u0440\u043e\u043a\u0441\u0438-\u0441\u0435\u0440\u0432\u0435\u0440\u0430 Squid 5.1, \u0433\u043e\u0442\u043e\u0432\u044b\u0439 \u0434\u043b\u044f \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u0432 \u0440\u0430\u0431\u043e\u0447\u0438\u0445 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445 (\u0432\u044b\u043f\u0443\u0441\u043a\u0438 5.0.x \u0438\u043c\u0435\u043b\u0438 \u0441\u0442\u0430\u0442\u0443\u0441 \u0431\u0435\u0442\u0430-\u0432\u0435\u0440\u0441\u0438\u0439). \u041f\u043e\u0441\u043b\u0435 \u043f\u0440\u0438\u0434\u0430\u043d\u0438\u044f \u0432\u0435\u0442\u043a\u0435 5.x \u0441\u0442\u0430\u0442\u0443\u0441\u0430 \u0441\u0442\u0430\u0431\u0438\u043b\u044c\u043d\u043e\u0439, \u0432 \u043d\u0435\u0439 \u043e\u0442\u043d\u044b\u043d\u0435 \u0431\u0443\u0434\u0443\u0442 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u044c\u0441\u044f \u0442\u043e\u043b\u044c\u043a\u043e \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u0438 \u043f\u0440\u043e\u0431\u043b\u0435\u043c \u0441\u043e \u0441\u0442\u0430\u0431\u0438\u043b\u044c\u043d\u043e\u0441\u0442\u044c\u044e, \u0442\u0430\u043a\u0436\u0435 \u0434\u043e\u043f\u0443\u0441\u043a\u0430\u0435\u0442\u0441\u044f \u0432\u043d\u0435\u0441\u0435\u043d\u0438\u0435 \u043d\u0435\u0431\u043e\u043b\u044c\u0448\u0438\u0445 \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0430\u0446\u0438\u0439. \u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0430 \u043d\u043e\u0432\u044b\u0445 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0435\u0439 \u0431\u0443\u0434\u0435\u0442 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u044c\u0441\u044f \u0432 \u043d\u043e\u0432\u043e\u0439 \u044d\u043a\u0441\u043f\u0435\u0440\u0438\u043c\u0435\u043d\u0442\u0430\u043b\u044c\u043d\u043e\u0439 \u0432\u0435\u0442\u043a\u0435 6.0. \u041f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f\u043c 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