{"id":37658,"date":"2019-10-31T22:18:53","date_gmt":"2019-10-31T19:18:53","guid":{"rendered":"https:\/\/prohoster.info\/blog\/kriticheskaya-uyazvimost-v-imap-servere-dovecot\/"},"modified":"2019-10-31T22:18:53","modified_gmt":"2019-10-31T19:18:53","slug":"kriticheskaya-uyazvimost-v-imap-servere-dovecot","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/kriticheskaya-uyazvimost-v-imap-servere-dovecot","title":{"rendered":"Vulnerabilit\u00e0 critica nel server IMAP Dovecot","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

In versioni correttive<\/a><\/noindex> server POP3\/IMAP4 Dovecot<\/a><\/noindex> 2.3.7.2 e 2.2.36.4, oltre a Pigeonhole 0.5.7.2 e 0.4.24.2 <\/a><\/noindex>, risolto vulnerabilit\u00e0 critica<\/a><\/noindex> (CVE-2019-11500<\/a><\/noindex>), che consente di scrivere dati oltre il buffer assegnato tramite l'invio di una richiesta appositamente formattata sui protocolli IMAP o ManageSieve. <\/p>\n

Il problema pu\u00f2 essere sfruttato anche prima dell'autenticazione. Non \u00e8 ancora stato preparato un exploit funzionante, ma gli sviluppatori di Dovecot non escludono la possibilit\u00e0 di utilizzare la vulnerabilit\u00e0 per eseguire attacchi di codice remoto o per organizzare fughe di dati riservati. Si consiglia a tutti gli utenti di installare urgentemente gli aggiornamenti (Debian<\/a><\/noindex>, Fedora<\/a><\/noindex>, Arch Linux<\/a><\/noindex>, Ubuntu<\/a><\/noindex>, SUSE<\/a><\/noindex>, RHEL<\/a><\/noindex>, FreeBSD<\/a><\/noindex>).<\/p>\n

La vulnerabilit\u00e0 \u00e8 presente nei parser dei protocolli IMAP e ManageSieve ed \u00e8 causata da una gestione errata dei caratteri a codice zero durante l'analisi dei dati all'interno delle stringhe racchiuse tra virgolette. Il problema consente di scrivere dati arbitrari negli oggetti memorizzati al di fuori del buffer assegnato (prima dell'autenticazione \u00e8 possibile sovrascrivere fino a 8 KB, mentre dopo l'autenticazione fino a 64 KB). <\/p>\n

Secondo opinione<\/a><\/noindex> L'uso delle vulnerabilit\u00e0 da parte degli ingegneri di Red Hat per attacchi reali \u00e8 complicato dal fatto che l'attaccante non pu\u00f2 controllare la posizione della sovrascrittura arbitraria dei dati nella heap. In risposta, si ritiene che questa caratteristica complichi notevolmente l'attacco, ma non lo escluda; l'attaccante pu\u00f2 ripetere tentativi di sfruttamento fino a quando non colpisce l'area operativa nella heap.<\/p>\n

<\/a><\/noindex><\/p>\n

Fonte: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0445 \u0432\u044b\u043f\u0443\u0441\u043a\u0430\u0445 POP3\/IMAP4-\u0441\u0435\u0440\u0432\u0435\u0440\u0430 Dovecot 2.3.7.2 \u0438 2.2.36.4, \u0430 \u0442\u0430\u043a\u0436\u0435 \u0432 \u0434\u043e\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0438 Pigeonhole 0.5.7.2 \u0438 0.4.24.2 , \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2019-11500), \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0437\u0430\u043f\u0438\u0441\u0438 \u0434\u0430\u043d\u043d\u044b\u0445 \u0437\u0430 \u043f\u0440\u0435\u0434\u0435\u043b\u044b \u0432\u044b\u0434\u0435\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0431\u0443\u0444\u0435\u0440\u0430 \u0447\u0435\u0440\u0435\u0437 \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0443 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0437\u0430\u043f\u0440\u043e\u0441\u0430 \u043f\u043e \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430\u043c IMAP \u0438\u043b\u0438 ManageSieve. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0430 \u043d\u0430 \u0441\u0442\u0430\u0434\u0438\u0438 \u0434\u043e \u043f\u0440\u043e\u0445\u043e\u0436\u0434\u0435\u043d\u0438\u044f \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438. \u0420\u0430\u0431\u043e\u0447\u0438\u0439 \u044d\u043a\u0441\u043f\u043b\u043e\u0438\u0442 \u043f\u043e\u043a\u0430 \u043d\u0435 \u043f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043b\u0435\u043d, \u043d\u043e […]<\/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-37658","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Vulnerabilit\u00e0 critica nel server IMAP Dovecot | ProHoster","description":"Nelle versioni correttive dei server POP3\/IMAP4 Dovecot 2.3.7.2 e 2.2.36.4, cos\u00ec come nel plugin Pigeonhole 0.5.7.2 e 0.4.24.2, \u00e8 stata risolta una vulnerabilit\u00e0 critica (CVE-2019-11500) che consente di ottenere la registrazione di dati oltre il buffer allocato inviando una richiesta appositamente formattata tramite i protocolli IMAP o ManageSieve. Il problema pu\u00f2 essere sfruttato prima dell'autenticazione. Al momento non esiste un exploit funzionante, ma","canonical_url":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/kriticheskaya-uyazvimost-v-imap-servere-dovecot","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"it_IT","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u041a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 IMAP-\u0441\u0435\u0440\u0432\u0435\u0440\u0435 Dovecot | ProHoster","og:description":"\u0412 \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0445 \u0432\u044b\u043f\u0443\u0441\u043a\u0430\u0445 POP3\/IMAP4-\u0441\u0435\u0440\u0432\u0435\u0440\u0430 Dovecot 2.3.7.2 \u0438 2.2.36.4, \u0430 \u0442\u0430\u043a\u0436\u0435 \u0432 \u0434\u043e\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0438 Pigeonhole 0.5.7.2 \u0438 0.4.24.2 , \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2019-11500), \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0437\u0430\u043f\u0438\u0441\u0438 \u0434\u0430\u043d\u043d\u044b\u0445 \u0437\u0430 \u043f\u0440\u0435\u0434\u0435\u043b\u044b \u0432\u044b\u0434\u0435\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0431\u0443\u0444\u0435\u0440\u0430 \u0447\u0435\u0440\u0435\u0437 \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0443 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\u043d\u043e","og:url":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/kriticheskaya-uyazvimost-v-imap-servere-dovecot","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2019-10-31T19:18:53+00:00","article:modified_time":"2019-10-31T19:18:53+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"37658","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":null,"schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"seo_analyzer_scan_date":"2026-01-23 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