{"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\/pl\/blog\/news\/udalyonnoe-vypolnenie-koda-v-forke-pochtovogo-servera-qmail-ot-proekta-sagredo","title":{"rendered":"Zdalne wykonanie kodu w forku serwera pocztowego qmail z projektu Sagredo","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

W rozwijanym projekcie Sagredo, w forku serwera pocztowego qmail, wykryto podatno\u015b\u0107 (CVE-2026-41113), umo\u017cliwiaj\u0105c\u0105 zdalne wykonanie dowolnych polece\u0144 na serwerze z uprawnieniami u\u017cytkownika qmailr. Podatno\u015b\u0107 spowodowana jest brakiem eskalacji specjalnych znak\u00f3w w nazwie hosta, zwracanej przez serwer DNS podczas okre\u015blania bramy MX, w po\u0142\u0105czeniu z przekazywaniem otrzymanej nazwy do polecenia popen bez odpowiedniego podzia\u0142u i filtrowania argument\u00f3w podczas wywo\u0142ywania pow\u0142oki. Podatno\u015b\u0107 zosta\u0142a usuni\u0119ta w wydaniu 2026.04.07. W publicznym dost\u0119pie opublikowano narz\u0119dzie do eksploatacji podatno\u015bci. <\/p>\n

W pa\u017adzierniku 2024 roku projekt Sagredo wprowadzi\u0142 do narz\u0119dzia qmail-remote zmian\u0119, kt\u00f3ra dodaje funkcj\u0119 «notlshosts_auto», zapami\u0119tuj\u0105c\u0105 hosty z niepoprawn\u0105 implementacj\u0105 protoko\u0142u TLS, z kt\u00f3rymi nie udaje si\u0119 nawi\u0105za\u0107 po\u0142\u0105czenia TLS, aby zapobiec zap\u0119tleniu si\u0119 z g\u00f3ry awaryjnej wysy\u0142ki poczty do takich host\u00f3w. <\/p>\n

Problem polega na tym, \u017ce zapisanie nazwy hosta odbywa\u0142o si\u0119 poprzez uruchomienie pow\u0142oki za pomoc\u0105 funkcji popen() z argumentem «\\\/bin\\\/touch %s\\\/control\\\/notlshosts\\\/'%s'», w kt\u00f3rym podstawiana by\u0142a nazwa hosta MX zwr\u00f3cona przez serwer DNS. Atakuj\u0105cy m\u00f3g\u0142 uruchomi\u0107 w\u0142asny serwer DNS, zwracaj\u0105cy w rekordach DNS MX nazw\u0119 w formacie «x'`id>\\\/tmp\\\/pwned`'y.evil.com», i osi\u0105gn\u0105\u0107 wykonanie podstawionego kodu, tworz\u0105c warunki do wywo\u0142ania funkcji zapisu nazwy awaryjnego poczty. serwera<\/a>.
\n
\u0179r\u00f3d\u0142o: 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\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\udd47Zdalne wykonanie kodu w forku serwera pocztowego qmail od projektu Sagredo | ProHoster","description":"W rozwijanym projekcie Sagredo, w forku serwera pocztowego qmail, wykryto podatno\u015b\u0107 (CVE-2026-41113), umo\u017cliwiaj\u0105c\u0105 zdalne wykonanie dowolnych polece\u0144 na serwerze z uprawnieniami u\u017cytkownika qmailr.","canonical_url":"https:\/\/prohoster.info\/pl\/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":"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\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 \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 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qmailr.","og:url":"https:\/\/prohoster.info\/pl\/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\/pl\/wp-json\/wp\/v2\/posts\/169325","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\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/comments?post=169325"}],"version-history":[{"count":1,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/posts\/169325\/revisions"}],"predecessor-version":[{"id":170739,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/posts\/169325\/revisions\/170739"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/media?parent=169325"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/categories?post=169325"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/tags?post=169325"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}