{"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\/ro\/blog\/news\/kriticheskaya-uyazvimost-v-imap-servere-dovecot","title":{"rendered":"Vulnerabilitate critic\u0103 \u00een serverul IMAP Dovecot","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

\u00cen versiuni corective<\/a><\/noindex> servere POP3\/IMAP4 Dovecot<\/a><\/noindex> 2.3.7.2 \u0219i 2.2.36.4, precum \u0219i \u00een extensie Pigeonhole 0.5.7.2 \u0219i 0.4.24.2 <\/a><\/noindex>, rezolvat\u0103 o vulnerabilitate critic\u0103<\/a><\/noindex> (CVE-2019-11500<\/a><\/noindex>), care permite scrierea de date dincolo de bufferul alocat prin trimiterea unei cereri special concepute pe protocoalele IMAP sau ManageSieve. <\/p>\n

Problema poate fi exploatat\u0103 \u00eenainte de autentificare. Un exploit func\u021bional nu este \u00eenc\u0103 disponibil, dar dezvoltatorii Dovecot nu exclud posibilitatea utiliz\u0103rii vulnerabilit\u0103\u021bii pentru a organiza atacuri de execu\u021bie la distan\u021b\u0103 \u00een sistem sau pentru a provoca scurgeri de date confiden\u021biale. To\u021bi utilizatorii sunt sf\u0103tui\u021bi s\u0103 instaleze urgent actualiz\u0103rile (Debian<\/a><\/noindex>, Fedora<\/a><\/noindex>, Arch Linux<\/a><\/noindex>, Ubuntu<\/a><\/noindex>, SUSE<\/a><\/noindex>, RHEL<\/a><\/noindex>, FreeBSD<\/a><\/noindex>).<\/p>\n

Vulnerabilitatea este prezent\u0103 \u00een analizatoarele protocoalelor IMAP \u0219i ManageSieve \u0219i este cauzat\u0103 de gestionarea incorect\u0103 a caracterelor cu cod zero \u00een timpul analizei datelor din \u0219irurile \u00eencadrate \u00een ghilimele. Problema permite scrierea de date arbitrare \u00een obiectele stocate dincolo de bufferul alocat (\u00een etapa \u00eenainte de autentificare este posibil\u0103 rescrierea de p\u00e2n\u0103 la 8 KB, iar dup\u0103 autentificare, de p\u00e2n\u0103 la 64 KB). <\/p>\n

Dup\u0103 opinia<\/a><\/noindex> Utilizarea problemelor de c\u0103tre inginerii de la Red Hat pentru atacuri reale este dificil\u0103 deoarece atacatorul nu poate controla pozi\u021bia re\u00eenc\u0103rc\u0103rii aleatorii a datelor \u00een heap. Ca r\u0103spuns, se afirm\u0103 c\u0103 aceast\u0103 particularitate complic\u0103 semnificativ atacul, dar nu \u00eel exclude - atacatorul poate repeta \u00eencerc\u0103rile de exploatare p\u00e2n\u0103 c\u00e2nd ajunge \u00een zona func\u021bional\u0103 a heap-ului.<\/p>\n

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

Sursa: opennet.ro<\/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-news"],"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\udd47Vulnerabilitate critic\u0103 \u00een serverul IMAP Dovecot | ProHoster","description":"\u00cen versiunile corective ale serverului POP3\/IMAP4","canonical_url":"https:\/\/prohoster.info\/ro\/blog\/news\/kriticheskaya-uyazvimost-v-imap-servere-dovecot","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"ro_RO","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","og:url":"https:\/\/prohoster.info\/ro\/blog\/news\/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 18:45:19","breadcrumb_settings":null,"limit_modified_date":false,"reviewed_by":null,"ai":null,"created":"2021-02-28 19:42:52","updated":"2026-01-23 18:45:19","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/posts\/37658","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/comments?post=37658"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/posts\/37658\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/media?parent=37658"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/categories?post=37658"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/tags?post=37658"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}