{"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\/it\/blog\/news\/udalyonnoe-vypolnenie-koda-v-forke-pochtovogo-servera-qmail-ot-proekta-sagredo","title":{"rendered":"Esecuzione remota di codice nel fork del server di posta qmail del progetto Sagredo","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Nel progetto in sviluppo del fork del server di posta Sagredo \u00e8 stata individuata una vulnerabilit\u00e0 (CVE-2026-41113) che permette l'esecuzione remota di comandi arbitrari sul server con i privilegi dell'utente qmailr. La vulnerabilit\u00e0 \u00e8 causata dalla mancanza di escape dei caratteri speciali nel nome host restituito dal server DNS durante la determinazione del gateway MX, insieme alla trasmissione del nome ottenuto al comando popen senza un'adeguata separazione e filtraggio degli argomenti al momento della chiamata alla shell. La vulnerabilit\u00e0 \u00e8 stata corretta nella release del 2026.04.07. \u00c8 stato pubblicato un toolkit per sfruttare la vulnerabilit\u00e0. <\/p>\n

Nel mese di ottobre 2024, il progetto Sagredo ha apportato una modifica all'utility qmail-remote, aggiungendo la funzione \u00abnotlshosts_auto\u00bb, che memorizza gli host con un'implementazione errata del protocollo TLS, con i quali non \u00e8 possibile stabilire una connessione TLS, per prevenire il looping di invio di posta a tali host malfunzionanti. <\/p>\n

Il problema \u00e8 che il salvataggio del nome dell'host avveniva tramite l'esecuzione di una shell command utilizzando la funzione popen() con l'argomento \u00ab\/bin\/touch %s\/control\/notlshosts\/'%s'\u00bb, in cui veniva inserito il nome dell'host MX restituito dal server DNS. Un attaccante poteva avviare il proprio server DNS, restituendo nei record DNS MX un nome del tipo \u00abx'`id>\/tmp\/pwned'y.evil.com\u00bb, e ottenere l'esecuzione del codice inserito, creando cos\u00ec le condizioni per la chiamata della funzione di salvataggio del nome della mail fallita. server<\/a>.
\n
Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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stata individuata una vulnerabilit\u00e0 (CVE-2026-41113) che permette l'esecuzione remota di comandi arbitrari sul server con i privilegi dell'utente qmailr.","canonical_url":"https:\/\/prohoster.info\/it\/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":"it_IT","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 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qmailr.","og:url":"https:\/\/prohoster.info\/it\/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\/it\/wp-json\/wp\/v2\/posts\/169325","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/comments?post=169325"}],"version-history":[{"count":1,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/posts\/169325\/revisions"}],"predecessor-version":[{"id":170739,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/posts\/169325\/revisions\/170739"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/media?parent=169325"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/categories?post=169325"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/tags?post=169325"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}