{"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\/et\/blog\/news\/kriticheskaya-uyazvimost-v-imap-servere-dovecot","title":{"rendered":"Kriitiline haavatavus Dovecot IMAP-serveris","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Uues parandatud v\u00e4ljalasked<\/a><\/noindex> POP3\/IMAP4-serverid Dovecot<\/a><\/noindex> 2.3.7.2 ja 2.2.36.4, samuti lisandina Pigeonhole 0.5.7.2 ja 0.4.24.2 <\/a><\/noindex>, k\u00f5rvaldatud kriitiline haavatavus<\/a><\/noindex> (CVE-2019-11500<\/a><\/noindex>), mis v\u00f5imaldab saavutada andmete salvestamist eraldatud puust v\u00e4ljapoole, saates spetsiaalselt vormindatud p\u00e4ringu IMAP v\u00f5i ManageSieve protokollide kaudu. <\/p>\n

Probleemi saab kasutada autentimist l\u00e4bimata. Aktiivset eksploitit pole veel valmistatud, kuid Dovecoti arendajad ei v\u00e4lista v\u00f5imalust kasutada haavatavust s\u00fcsteemis kaugi t\u00e4itmisr\u00fcnnakute korraldamiseks v\u00f5i konfidentsiaalsete andmete lekke korraldamiseks. K\u00f5igile kasutajatele soovitatakse kiiresti installida uuendused (Debian<\/a><\/noindex>, Fedora<\/a><\/noindex>, Arch Linux<\/a><\/noindex>, Ubuntu<\/a><\/noindex>, SUSE<\/a><\/noindex>, RHEL<\/a><\/noindex>, FreeBSD<\/a><\/noindex>).<\/p>\n

Haavatavus esineb IMAP ja ManageSieve protokollide parserites ja on p\u00f5hjustatud nullkoodi s\u00fcmbolite vale t\u00f6\u00f6tlemise t\u00f5ttu tsiteeritud stringide sees andmete anal\u00fc\u00fcsimise protsessis. Probleem v\u00f5imaldab saavutada meelevaldsete andmete salvestamist objektidesse, mis asuvad eraldatud puust v\u00e4ljapoole (autentimise eel saab kirjutada kuni 8 KB, p\u00e4rast autentimist kuni 64 KB). <\/p>\n

Ajal arvates<\/a><\/noindex> Red Hat'i insenerite jaoks on reaalsete r\u00fcnnakute teostamine keeruline, kuna r\u00fcndajal ei ole v\u00f5imalik juhtida juhuslike andmete kirjutamise asukohta m\u00e4lus. Vastuseks v\u00e4ljendatakse arvamust, et see omadus muudab r\u00fcnnaku oluliselt keerulisemaks, kuid ei v\u00e4lista selle teostamist \u2014 r\u00fcndaja v\u00f5ib korduvalt proovida \u00e4ra kasutama, kuni ta satub t\u00f6\u00f6tavasse piirkonda m\u00e4lus.<\/p>\n

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

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

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[…]<\/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\udd47Kriitiline haavatavus IMAP-serveris Dovecot | ProHoster","description":"parandatud v\u00e4ljalasked POP3\/IMAP4-serveritele","canonical_url":"https:\/\/prohoster.info\/et\/blog\/news\/kriticheskaya-uyazvimost-v-imap-servere-dovecot","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"et_EE","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 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