{"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\/pl\/blog\/news\/kriticheskaya-uyazvimost-v-imap-servere-dovecot","title":{"rendered":"Krytyczna luka w serwerze IMAP Dovecot","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

W poprawkach<\/a><\/noindex> serwery POP3\/IMAP4 Dovecot<\/a><\/noindex> 2.3.7.2 i 2.2.36.4, a tak\u017ce jako dodatek Pigeonhole 0.5.7.2 i 0.4.24.2 <\/a><\/noindex>, usuni\u0119to krytyczna luka<\/a><\/noindex> (CVE-2019-11500<\/a><\/noindex>), kt\u00f3ra pozwala na zapis danych poza przydzielonym buforem przez wys\u0142anie specjalnie sformatowanego \u017c\u0105dania za po\u015brednictwem protoko\u0142\u00f3w IMAP lub ManageSieve. <\/p>\n

Problem mo\u017ce by\u0107 wykorzystywany na etapie przed uwierzytelnieniem. Dzia\u0142aj\u0105cy exploity jak na razie nie s\u0105 dost\u0119pne, ale deweloperzy Dovecot nie wykluczaj\u0105 mo\u017cliwo\u015bci wykorzystania luki do zdalnego wykonania kodu w systemie lub wycieku poufnych danych. Wszyscy u\u017cytkownicy s\u0105 proszeni o pilne zainstalowanie aktualizacji (Debian<\/a><\/noindex>, Fedora<\/a><\/noindex>, Arch Linux<\/a><\/noindex>, Ubuntu<\/a><\/noindex>, SUSE<\/a><\/noindex>, RHEL<\/a><\/noindex>, FreeBSD<\/a><\/noindex>).<\/p>\n

Luka wyst\u0119puje w parserach protoko\u0142\u00f3w IMAP i ManageSieve i jest spowodowana nieprawid\u0142owym przetwarzaniem znak\u00f3w z zerowym kodem podczas analizy danych wewn\u0105trz uj\u0119tych w cudzys\u0142owy ci\u0105g\u00f3w. Problem pozwala na zapis dowolnych danych w obiektach przechowywanych poza przydzielonym buforem (na etapie przed uwierzytelnieniem mo\u017cna nadpisa\u0107 do 8 kB, a po uwierzytelnieniu do 64 kB). <\/p>\n

Wed\u0142ug zdaniem<\/a><\/noindex> in\u017cynier\u00f3w z firmy Red Hat wykorzystanie problemu do rzeczywistych atak\u00f3w jest utrudnione tym, \u017ce atakuj\u0105cy nie mo\u017ce kontrolowa\u0107 pozycji dowolnego nadpisania danych w stercie. W odpowiedzi wyra\u017cane jest zdanie, \u017ce ta cecha jedynie znacznie utrudnia atak, ale nie wyklucza jego przeprowadzenia \u2014 atakuj\u0105cy mo\u017ce wielokrotnie powtarza\u0107 pr\u00f3by wykorzystania, dop\u00f3ki nie trafi do obszaru roboczego w stercie.<\/p>\n

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

\u0179r\u00f3d\u0142o: 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-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\udd47Krytyczna luka w serwerze IMAP Dovecot | ProHoster","description":"W poprawkach serwer\u00f3w POP3\/IMAP4","canonical_url":"https:\/\/prohoster.info\/pl\/blog\/news\/kriticheskaya-uyazvimost-v-imap-servere-dovecot","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"pl_PL","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\/pl\/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\/pl\/wp-json\/wp\/v2\/posts\/37658","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/comments?post=37658"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/posts\/37658\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/media?parent=37658"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/categories?post=37658"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/tags?post=37658"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}