{"id":36033,"date":"2019-10-31T22:09:16","date_gmt":"2019-10-31T19:09:16","guid":{"rendered":"https:\/\/prohoster.info\/blog\/vypusk-gnupg-2-2-17-s-izmeneniyami-dlya-protivostoyaniya-atake-na-servery-klyuchej\/"},"modified":"2019-10-31T22:09:16","modified_gmt":"2019-10-31T19:09:16","slug":"vypusk-gnupg-2-2-17-s-izmeneniyami-dlya-protivostoyaniya-atake-na-servery-klyuchej","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/vypusk-gnupg-2-2-17-s-izmeneniyami-dlya-protivostoyaniya-atake-na-servery-klyuchej","title":{"rendered":"Rilascio di GnuPG 2.2.17 con modifiche per contrastare gli attacchi ai server di chiave","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/lists.gnupg.org\/pipermail\/gnupg-announce\/2019q3\/000439.html\">Pubblicato<\/a><\/noindex>  rilascio dello strumento  <noindex><a rel=\"nofollow\" href=\"https:\/\/gnupg.org\/\">GnuPG 2.2.17<\/a><\/noindex> (GNU Privacy Guard), compatibile con gli standard OpenPGP (<noindex><a rel=\"nofollow\" href=\"https:\/\/tools.ietf.org\/html\/rfc4880\">RFC-4880<\/a><\/noindex>) e S\/MIME, e fornendo strumenti per la crittografia dei dati, la gestione delle firme elettroniche, la gestione delle chiavi e l'accesso ai repository pubblici delle chiavi. Ricordiamo che il ramo GnuPG 2.2 \u00e8 posizionato come una versione in via di sviluppo, in cui vengono continuamente aggiunte nuove funzionalit\u00e0, mentre nel ramo 2.1 sono ammessi solo correttivi.<\/p>\n<p>Nel nuovo rilascio sono state proposte misure per contrastare <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51006\">gli attacchi ai server di chiavi<\/a><\/noindex>, che portano a un blocco di GnuPG e all'impossibilit\u00e0 di ulteriori operazioni fino alla rimozione del certificato problematico dallo store locale o alla ricreazione dello store dei certificati basato su chiavi pubbliche verificate. La protezione aggiunta si basa sull'ignorare completamente per impostazione predefinita tutte le firme digitali di certificati esterni ricevuti dai server di archiviazione delle chiavi. Ricordiamo che qualsiasi utente pu\u00f2 aggiungere la propria firma digitale al server di archiviazione delle chiavi per certificati arbitrari, impiegata dagli attaccanti per generare un enorme numero di tali firme (pi\u00f9 di centomila) per il certificato della vittima, il cui trattamento compromette il normale funzionamento di GnuPG.<\/p>\n<p>L'ignoranza delle firme digitali di terzi \u00e8 regolata dall'opzione \u00abself-sigs-only\u00bb, che consente il caricamento solo delle firme dei propri creatori. Per ripristinare il comportamento precedente, \u00e8 possibile aggiungere la configurazione \u00abkeyserver-options no-self-sigs-only,no-import-clean\u00bb in gpg.conf. Se durante l'operazione viene rilevato l'import di un numero di blocchi tale da causare un overflow dello storage locale (pubring.kbx), GnuPG attiva automaticamente la modalit\u00e0 di ignoranza delle firme digitali (\u00abself-sigs-only,import-clean\u00bb) invece di restituire un errore. <\/p>\n<p>Per aggiornare le chiavi utilizzando il meccanismo <noindex><a rel=\"nofollow\" href=\"https:\/\/wiki.gnupg.org\/WKD\">Web Key Directory<\/a><\/noindex> \u00c8 stata aggiunta l'opzione \u00ab\u2014locate-external-key\u00bb che pu\u00f2 essere utilizzata per ricreare il deposito dei certificati basato su chiavi pubbliche verificate. Quando si esegue l'operazione \u00ab\u2014auto-key-retrieve\u00bb, il meccanismo WKD \u00e8 ora pi\u00f9 preferibile rispetto ai server di chiavi. Il funzionamento di WKD consiste nel posizionare le chiavi pubbliche sul web, collegate al dominio specificato nell'indirizzo e-mail. Ad esempio, per l'indirizzo \u00abtest@example.com\u00bb, la chiave pu\u00f2 essere caricata tramite il link \u00abhttps:\/\/example.com\/.well-known\/openpgpkey\/hu\/183d7d5ab73cfceece9a5594e6039d5a\u00bb.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Fonte: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51067\">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 \u0440\u0435\u043b\u0438\u0437 \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u044f GnuPG 2.2.17 (GNU Privacy Guard), \u0441\u043e\u0432\u043c\u0435\u0441\u0442\u0438\u043c\u043e\u0433\u043e \u0441\u043e \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u0430\u043c\u0438 OpenPGP (RFC-4880) \u0438 S\/MIME, \u0438 \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0435\u0433\u043e \u0443\u0442\u0438\u043b\u0438\u0442\u044b \u0434\u043b\u044f \u0448\u0438\u0444\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0434\u0430\u043d\u043d\u044b\u0445, \u0440\u0430\u0431\u043e\u0442\u044b \u0441 \u044d\u043b\u0435\u043a\u0442\u0440\u043e\u043d\u043d\u044b\u043c\u0438 \u043f\u043e\u0434\u043f\u0438\u0441\u044f\u043c\u0438, \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u043a\u043b\u044e\u0447\u0430\u043c\u0438 \u0438 \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043a \u043f\u0443\u0431\u043b\u0438\u0447\u043d\u044b\u043c \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0430\u043c \u043a\u043b\u044e\u0447\u0435\u0439. \u041d\u0430\u043f\u043e\u043c\u043d\u0438\u043c, \u0447\u0442\u043e \u0432\u0435\u0442\u043a\u0430 GnuPG 2.2 \u043f\u043e\u0437\u0438\u0446\u0438\u043e\u043d\u0438\u0440\u0443\u0435\u0442\u0441\u044f \u043a\u0430\u043a \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u044e\u0449\u0438\u0439\u0441\u044f \u0432\u044b\u043f\u0443\u0441\u043a, \u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0430\u044e\u0442 \u0434\u043e\u0431\u0430\u0432\u043b\u044f\u0442\u044c\u0441\u044f \u043d\u043e\u0432\u044b\u0435 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0438, \u0432 \u0432\u0435\u0442\u043a\u0435 2.1 \u0434\u043e\u043f\u0443\u0441\u043a\u0430\u044e\u0442\u0441\u044f \u0442\u043e\u043b\u044c\u043a\u043e \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\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-36033","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 \u0440\u0435\u043b\u0438\u0437 \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u044f GnuPG.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/it\/blog\/news\/vypusk-gnupg-2-2-17-s-izmeneniyami-dlya-protivostoyaniya-atake-na-servery-klyuchej\" \/>\n\t<meta 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