{"id":169325,"date":"2026-04-19T11:11:58","date_gmt":"2026-04-19T09:11:58","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/udalyonnoe-vypolnenie-koda-v-forke-pochtovogo-servera-qmail-ot-proekta-sagredo"},"modified":"2026-04-19T11:11:58","modified_gmt":"2026-04-19T09:11:58","slug":"udalyonnoe-vypolnenie-koda-v-forke-pochtovogo-servera-qmail-ot-proekta-sagredo","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/news\/udalyonnoe-vypolnenie-koda-v-forke-pochtovogo-servera-qmail-ot-proekta-sagredo","title":{"rendered":"Dia\u013ekov\u00e9 vykon\u00e1vanie k\u00f3du vo fork pochytom serveri qmail od projektu Sagredo","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

V rozv\u00edjaj\u00facom sa projekte Sagredo fork po\u0161tov\u00e9ho servera qmail bola zisten\u00e1 zranite\u013enos\u0165 (CVE-2026-41113), ktor\u00e1 umo\u017e\u0148uje dosiahnu\u0165 vzdialen\u00e9 vykon\u00e1vanie \u013eubovo\u013en\u00fdch pr\u00edkazov na serveri s pr\u00e1vami pou\u017e\u00edvate\u013ea qmailr. Zranite\u013enos\u0165 je sp\u00f4soben\u00e1 absenciou escapovania \u0161peci\u00e1lnych znakov v n\u00e1zve hostite\u013ea, ktor\u00fd vracia DNS server pri ur\u010dovan\u00ed MX br\u00e1ny, v kombin\u00e1cii s odovzd\u00e1van\u00edm z\u00edskan\u00e9ho n\u00e1zvu do pr\u00edkazu popen bez riadneho oddelenia a filtr\u00e1cie argumentov pri volan\u00ed shell. Zranite\u013enos\u0165 bola odstr\u00e1nen\u00e1 v vydan\u00ed 2026.04.07. V otvorenom pr\u00edstupe bol zverejnen\u00fd n\u00e1stroj na exploit\u00e1ciu zranite\u013enosti. <\/p>\n

V okt\u00f3bri 2024 pridal projekt Sagredo do n\u00e1stroja qmail-remote zmenu, ktor\u00e1 prid\u00e1va funkciu «notlshosts_auto», ktor\u00e1 si pam\u00e4t\u00e1 hostite\u013eov s nespr\u00e1vnou implement\u00e1ciou protokolu TLS, s ktor\u00fdmi nie je mo\u017en\u00e9 nadviaza\u0165 TLS pripojenie, aby sa predi\u0161lo vyhadzovaniu v zasielan\u00ed e-mailov na tieto hostite\u013eov. <\/p>\n

Probl\u00e9m spo\u010d\u00edva v tom, \u017ee ulo\u017eenie n\u00e1zvu hostite\u013ea sa vykon\u00e1valo spusten\u00edm pr\u00edkazov\u00e9ho shellu pomocou funkcie popen() s argumentom «\\\/bin\\\/touch %s\\\/control\\\/notlshosts\\\/’%s'», do ktor\u00e9ho sa vkladalo meno MX-hostite\u013ea vr\u00e1ten\u00e9 DNS serverom. \u00dato\u010dn\u00edk mohol spusti\u0165 svoj DNS server, ktor\u00fd by vr\u00e1til v DNS z\u00e1znamoch MX n\u00e1zov vo form\u00e1te «x’`id>\\\/tmp\\\/pwned`’y.evil.com», a dosiahnu\u0165 vykonanie vlo\u017een\u00e9ho k\u00f3du, \u010d\u00edm by vytvoril podmienky na vyvolanie funkcie na ulo\u017eenie n\u00e1zvu zlyh\u00e1vaj\u00faceho e-mailu. servera<\/a>.
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u043c\u043e\u043c \u043f\u0440\u043e\u0435\u043a\u0442\u043e\u043c Sagredo \u0444\u043e\u0440\u043a\u0435 \u043f\u043e\u0447\u0442\u043e\u0432\u043e\u0433\u043e \u0441\u0435\u0440\u0432\u0435\u0440\u0430 qmail \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2026-41113), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u0433\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0445 \u043a\u043e\u043c\u0430\u043d\u0434 \u043d\u0430 \u0441\u0435\u0440\u0432\u0435\u0440\u0435 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f qmailr. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u0435\u043c \u044d\u043a\u0440\u0430\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0441\u043f\u0435\u0446\u0441\u0438\u043c\u0432\u043e\u043b\u043e\u0432 \u0432 \u0438\u043c\u0435\u043d\u0438 \u0445\u043e\u0441\u0442\u0430, \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u043c\u043e\u0433\u043e DNS-\u0441\u0435\u0440\u0432\u0435\u0440\u043e\u043c \u043f\u0440\u0438 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u0438 MX-\u0448\u043b\u044e\u0437\u0430, \u0432 \u0441\u043e\u0447\u0435\u0442\u0430\u043d\u0438\u0438 \u0441 \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0435\u0439 \u043f\u043e\u043b\u0443\u0447\u0435\u043d\u043d\u043e\u0433\u043e \u0438\u043c\u0435\u043d\u0438 \u0432 \u043a\u043e\u043c\u0430\u043d\u0434\u0443 popen \u0431\u0435\u0437 \u0434\u043e\u043b\u0436\u043d\u043e\u0433\u043e \u0440\u0430\u0437\u0434\u0435\u043b\u0435\u043d\u0438\u044f \u0438 \u0444\u0438\u043b\u044c\u0442\u0440\u0430\u0446\u0438\u0438 \u0430\u0440\u0433\u0443\u043c\u0435\u043d\u0442\u043e\u0432 \u043f\u0440\u0438 \u0432\u044b\u0437\u043e\u0432\u0435 shell. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-169325","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\udd47Vzdialen\u00e9 vykon\u00e1vanie k\u00f3du vo fork po\u0161tov\u00e9ho servera qmail od projektu Sagredo | ProHoster","description":"V rozv\u00edjaj\u00facom sa projekte Sagredo fork po\u0161tov\u00e9ho servera qmail bola zisten\u00e1 zranite\u013enos\u0165 (CVE-2026-41113), ktor\u00e1 umo\u017e\u0148uje dosiahnu\u0165 vzdialen\u00e9 vykon\u00e1vanie \u013eubovo\u013en\u00fdch pr\u00edkazov na serveri s pr\u00e1vami pou\u017e\u00edvate\u013ea qmailr.","canonical_url":"https:\/\/prohoster.info\/sk\/blog\/news\/udalyonnoe-vypolnenie-koda-v-forke-pochtovogo-servera-qmail-ot-proekta-sagredo","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"sk_SK","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\u0423\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u0435 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u043a\u043e\u0434\u0430 \u0432 \u0444\u043e\u0440\u043a\u0435 \u043f\u043e\u0447\u0442\u043e\u0432\u043e\u0433\u043e \u0441\u0435\u0440\u0432\u0435\u0440\u0430 qmail \u043e\u0442 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 Sagredo | ProHoster","og:description":"\u0412 \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u043c\u043e\u043c \u043f\u0440\u043e\u0435\u043a\u0442\u043e\u043c Sagredo \u0444\u043e\u0440\u043a\u0435 \u043f\u043e\u0447\u0442\u043e\u0432\u043e\u0433\u043e \u0441\u0435\u0440\u0432\u0435\u0440\u0430 qmail \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2026-41113), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u0433\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f 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qmailr.","og:url":"https:\/\/prohoster.info\/sk\/blog\/news\/udalyonnoe-vypolnenie-koda-v-forke-pochtovogo-servera-qmail-ot-proekta-sagredo","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":"2026-04-19T09:11:58+00:00","article:modified_time":"2026-04-19T09:11:58+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\/sk\/wp-json\/wp\/v2\/posts\/169325","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/comments?post=169325"}],"version-history":[{"count":1,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/posts\/169325\/revisions"}],"predecessor-version":[{"id":170739,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/posts\/169325\/revisions\/170739"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/media?parent=169325"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/categories?post=169325"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/tags?post=169325"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}