{"id":110482,"date":"2023-10-05T03:11:34","date_gmt":"2023-10-05T01:11:34","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-exim-obnaruzhili-kriticheskie-uyazvimosti-pozvolyashhie-vypolnit-na-servere-proizvolnyj-kod"},"modified":"2023-10-05T03:11:34","modified_gmt":"2023-10-05T01:11:34","slug":"v-exim-obnaruzhili-kriticheskie-uyazvimosti-pozvolyashhie-vypolnit-na-servere-proizvolnyj-kod","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/v-exim-obnaruzhili-kriticheskie-uyazvimosti-pozvolyashhie-vypolnit-na-servere-proizvolnyj-kod","title":{"rendered":"V Eximu byly objeveny kritick\u00e9 zranitelnosti, kter\u00e9 umo\u017e\u0148uj\u00ed na serveru vykon\u00e1vat libovoln\u00fd k\u00f3d.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

ZDI (Zero Day Initiative) zve\u0159ejnili informace o t\u0159ech nalezen\u00fdch kritick\u00fdch zranitelnostech v po\u0161tovn\u00edm serveru Exim, kter\u00e9 umo\u017e\u0148uj\u00ed vykon\u00e1vat libovoln\u00fd k\u00f3d jm\u00e9nem procesu serveru, kter\u00fd otev\u0159el port 25. K proveden\u00ed \u00fatoku nen\u00ed vy\u017eadov\u00e1na autentizace na serveru.<\/p>\n

    <\/p>\n
  1. CVE-2023-42115<\/a> \u2014 umo\u017e\u0148uje dos\u00e1hnout z\u00e1pisu vlastn\u00edch dat za hranicemi vymezen\u00e9ho bufferu. Vznikla z chyby p\u0159i kontrole vstupn\u00edch dat v SMTP slu\u017eb\u011b.<\/li>\n

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

  2. CVE-2023-42116<\/a> \u2013 zp\u016fsobena kop\u00edrov\u00e1n\u00edm dat od u\u017eivatele do bufferu fixn\u00ed velikosti bez kontroly pot\u0159ebn\u00e9 velikosti.<\/li>\n
  3. CVE-2023-42117<\/a> \u2013 rovn\u011b\u017e zp\u016fsobena absenc\u00ed kontroly vstupn\u00edch dat na portu 25 SMTP slu\u017eby.<\/li>\n<\/ol>\n

    Zranitelnosti jsou ozna\u010deny jako 0-day, co\u017e znamen\u00e1, \u017ee nebudou opraveny, i kdy\u017e podle ZDI byli v\u00fdvoj\u00e1\u0159i Exim ji\u017e dlouho upozorn\u011bni na jejich p\u0159\u00edtomnost. Oprava by mohla b\u00fdt ve verzi 4.97 serveru, ale to nen\u00ed jist\u00e9.<\/p>\n

    Jako ochrana proti t\u011bmto zranitelnostem se v tuto chv\u00edli navrhuje omezen\u00ed p\u0159\u00edstupu k SMTP na portu 25.<\/p>\n

    <\/p>\n

    UPD.<\/strong> Zd\u00e1 se, \u017ee to nen\u00ed tak hrozn\u00e9. Tyto zranitelnosti maj\u00ed lok\u00e1ln\u00ed charakter. Neprob\u00edhaj\u00ed, pokud server nepou\u017e\u00edv\u00e1 NTLM a EXTERNAL autentizaci, nen\u00ed uzav\u0159en za proxy, nepou\u017e\u00edv\u00e1 potenci\u00e1ln\u011b nebezpe\u010dn\u00e9 DNS servery a nepou\u017e\u00edv\u00e1 spf v acl. V\u00edce informac\u00ed…<\/a><\/p>\n

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

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

    ZDI (Zero Day Initiative) \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b\u0438 \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u043e \u0442\u0440\u0435\u0445 \u043d\u0430\u0439\u0434\u0435\u043d\u043d\u044b\u0445 \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0445 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044f\u0445 \u0432 \u043f\u043e\u0447\u0442\u043e\u0432\u043e\u043c \u0441\u0435\u0440\u0432\u0435\u0440\u0435 Exim, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0445 \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0439 \u043a\u043e\u0434 \u043e\u0442 \u0438\u043c\u0435\u043d\u0438 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0430 \u0441\u0435\u0440\u0432\u0435\u0440\u0430, \u043e\u0442\u043a\u0440\u044b\u0432\u0448\u0435\u0433\u043e 25\u0439 \u043f\u043e\u0440\u0442. \u0414\u043b\u044f \u043f\u0440\u043e\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u0430\u0442\u0430\u043a\u0438 \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f \u043d\u0430 \u0441\u0435\u0440\u0432\u0435\u0440\u0435 \u043d\u0435 \u0442\u0440\u0435\u0431\u0443\u0435\u0442\u0441\u044f. CVE-2023-42115 \u2014 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0437\u0430\u043f\u0438\u0441\u0438 \u0441\u0432\u043e\u0438\u0445 \u0434\u0430\u043d\u043d\u044b\u0445 \u0437\u0430 \u0433\u0440\u0430\u043d\u0438\u0446\u0430\u043c\u0438 \u0432\u044b\u0434\u0435\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0431\u0443\u0444\u0435\u0440\u0430.\u00a0\u0412\u044b\u0437\u0432\u0430\u043d\u0430 \u043e\u0448\u0438\u0431\u043a\u043e\u0439 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u0432\u0445\u043e\u0434\u043d\u044b\u0445 \u0434\u0430\u043d\u043d\u044b\u0445 \u0432 \u0441\u0435\u0440\u0432\u0438\u0441\u0435 SMTP. CVE-2023-42116 \u2013\u00a0\u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u043a\u043e\u043f\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435\u043c […]<\/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-110482","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\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\udd47V Exim byly objeveny kritick\u00e9 zranitelnosti, kter\u00e9 umo\u017e\u0148uj\u00ed vykon\u00e1vat na serveru libovoln\u00fd k\u00f3d | ProHoster","description":"ZDI (Zero Day Initiative) zve\u0159ejnili informace o t\u0159ech nalezen\u00fdch kritick\u00fdch zranitelnostech v po\u0161tovn\u00edm serveru Exim, kter\u00e9 umo\u017e\u0148uj\u00ed vykon\u00e1vat libovoln\u00fd k\u00f3d jm\u00e9nem procesu serveru, kter\u00fd otev\u0159el port 25.","canonical_url":"https:\/\/prohoster.info\/cs\/blog\/news\/v-exim-obnaruzhili-kriticheskie-uyazvimosti-pozvolyashhie-vypolnit-na-servere-proizvolnyj-kod","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"cs_CZ","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\u0412 Exim \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0438\u043b\u0438 \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0449\u0438\u0435 \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043d\u0430 \u0441\u0435\u0440\u0432\u0435\u0440\u0435 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0439 \u043a\u043e\u0434 | ProHoster","og:description":"ZDI (Zero Day Initiative) \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b\u0438 \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u043e \u0442\u0440\u0435\u0445 \u043d\u0430\u0439\u0434\u0435\u043d\u043d\u044b\u0445 \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0445 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044f\u0445 \u0432 \u043f\u043e\u0447\u0442\u043e\u0432\u043e\u043c \u0441\u0435\u0440\u0432\u0435\u0440\u0435 Exim, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0445 \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0439 \u043a\u043e\u0434 \u043e\u0442 \u0438\u043c\u0435\u043d\u0438 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0430 \u0441\u0435\u0440\u0432\u0435\u0440\u0430, \u043e\u0442\u043a\u0440\u044b\u0432\u0448\u0435\u0433\u043e 25\u0439 \u043f\u043e\u0440\u0442.","og:url":"https:\/\/prohoster.info\/cs\/blog\/news\/v-exim-obnaruzhili-kriticheskie-uyazvimosti-pozvolyashhie-vypolnit-na-servere-proizvolnyj-kod","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":"2023-10-05T01:11:34+00:00","article:modified_time":"2023-10-05T01:11:34+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":[],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/110482","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/comments?post=110482"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/110482\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/media?parent=110482"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/categories?post=110482"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/tags?post=110482"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}