{"id":121341,"date":"2025-01-15T03:45:59","date_gmt":"2025-01-15T01:45:59","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-rsync-3-4-0-ustraneny-uyazvimosti-pozvolyavshie-vypolnit-kod-na-servere-i-kliente"},"modified":"2025-01-15T03:45:59","modified_gmt":"2025-01-15T01:45:59","slug":"v-rsync-3-4-0-ustraneny-uyazvimosti-pozvolyavshie-vypolnit-kod-na-servere-i-kliente","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/v-rsync-3-4-0-ustraneny-uyazvimosti-pozvolyavshie-vypolnit-kod-na-servere-i-kliente","title":{"rendered":"Con Rsync 3.4.0 sono state corrette vulnerabilit\u00e0 che consentivano l'esecuzione di codice sul server e sul client.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>\u00c8 stata pubblicata la versione dell'utility di sincronizzazione file Rsync 3.4.0, in cui sono state corrette sei vulnerabilit\u00e0. La combinazione delle vulnerabilit\u00e0 CVE-2024-12084 e CVE-2024-12085 consente al client di eseguire il proprio codice sul server. \u00c8 sufficiente una connessione anonima al server Rsync con accesso in sola lettura per effettuare l'attacco. Ad esempio, l'attacco pu\u00f2 essere effettuato su mirror di vari distributori e progetti che offrono la possibilit\u00e0 di scaricare build tramite Rsync. Il problema riguarda anche varie applicazioni di sincronizzazione file e backup che utilizzano Rsync come backend, come Rclone, DeltaCopy e ChronoSync.    <\/p>\n<p>Inoltre, sfruttando la vulnerabilit\u00e0 su <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/it\/server\/dts-newyork\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2736\">server<\/a> l'attaccante pu\u00f2 organizzare un attacco sui client che si collegano al server e ottenere la lettura o la scrittura di qualsiasi file nel loro sistema, entro i limiti dei permessi del processo rsync. Ad esempio, attraverso la creazione di rsync malevoli,<a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/it\/server\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1681\">server<\/a> si possono caricare chiavi SSH o eseguire codice sovrascrivendo file come ~\/.bashrc e ~\/.popt.      <\/p>\n<p>Per semplificare il controllo degli aggiornamenti dei server alla nuova versione di Rsync, il numero del protocollo nella versione Rsync 3.4.0 \u00e8 stato aumentato a 32. \u00c8 possibile tenere traccia degli aggiornamenti nei distributori alle seguenti pagine: Debian, Ubuntu, RHEL, SUSE\/openSUSE, Fedora, Arch, FreeBSD.       <\/p>\n<p>Vulnerabilit\u00e0 identificate:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2024-12084 \u2014 scrittura oltre il buffer allocato a causa della trasmissione di un checksum errato, la cui dimensione supera i 16 byte.\n<li class=\"l\"> CVE-2024-12085 \u2014 fuga di contenuto di dati non inizializzati dallo stack (un byte alla volta) durante esecuzioni di operazioni di confronto dei checksum di dimensione errata.\n<li class=\"l\"> CVE-2024-12086 \u2014 accesso del server al contenuto di file arbitrari dal sistema del client tramite la generazione da parte del server di token comunicativi e checksum errati durante il processo di copia dei file dal client al server (determinazione del contenuto byte per byte tramite tentativo del checksum).\n<li class=\"l\"> CVE-2024-12087 \u2014 uscita oltre il catalogo di base utilizzando l'opzione \u00ab\u2014inc-recursive\u00bb (attivata per impostazione predefinita per molti flag). La vulnerabilit\u00e0 \u00e8 causata dall'assenza di un'adeguata verifica dei link simbolici e consente di scrivere file al di fuori della cartella di destinazione specificata dal cliente. Un server sotto il controllo dell'attaccante pu\u00f2 sfruttare la vulnerabilit\u00e0 per attaccare il sistema del cliente connesso.\n<li class=\"l\"> CVE-2024-12088 \u2014 verifica errata dei link simbolici che puntano verso altri link simbolici, quando si utilizza l'opzione \u00ab\u2014safe-links\u00bb. Il problema consente di uscire dal catalogo di base e di scrivere dati in qualsiasi file nel sistema, nei limiti delle autorizzazioni.\n<li class=\"l\"> CVE-2024-12747 \u2014 stato di competizione nella gestione dei link simbolici, che consente all'utente di elevare i propri privilegi e accedere a file riservati sul server.    <\/ul>\n<p>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=62557\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 \u0443\u0442\u0438\u043b\u0438\u0442\u044b \u0434\u043b\u044f \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0444\u0430\u0439\u043b\u043e\u0432 Rsync 3.4.0, \u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u043e \u0448\u0435\u0441\u0442\u044c \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439. \u041a\u043e\u043c\u0431\u0438\u043d\u0430\u0446\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 CVE-2024-12084 \u0438 CVE-2024-12085 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043a\u043b\u0438\u0435\u043d\u0442\u0443 \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u0441\u0432\u043e\u0435\u0433\u043e \u043a\u043e\u0434\u0430 \u043d\u0430 \u0441\u0435\u0440\u0432\u0435\u0440\u0435. \u0414\u043b\u044f \u0441\u043e\u0432\u0435\u0440\u0448\u0435\u043d\u0438\u044f \u0430\u0442\u0430\u043a\u0438 \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u0430\u043d\u043e\u043d\u0438\u043c\u043d\u043e\u0433\u043e \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u043a \u0441\u0435\u0440\u0432\u0435\u0440\u0443 Rsync \u0441 \u0434\u043e\u0441\u0442\u0443\u043f\u043e\u043c \u043d\u0430 \u0447\u0442\u0435\u043d\u0438\u0435. \u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0430\u0442\u0430\u043a\u0430 \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u0441\u043e\u0432\u0435\u0440\u0448\u0435\u043d\u0430 \u043d\u0430 \u0437\u0435\u0440\u043a\u0430\u043b\u0430 \u0440\u0430\u0437\u043b\u0438\u0447\u043d\u044b\u0445 \u0434\u0438\u0441\u0442\u0440\u0438\u0431\u0443\u0442\u0438\u0432\u043e\u0432 \u0438 \u043f\u0440\u043e\u0435\u043a\u0442\u043e\u0432, \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0438\u0445 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0438 \u0441\u0431\u043e\u0440\u043e\u043a \u0447\u0435\u0440\u0435\u0437 [&hellip;]<\/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-121341","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 \u0443\u0442\u0438\u043b\u0438\u0442\u044b \u0434\u043b\u044f \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0444\u0430\u0439\u043b\u043e\u0432 Rsync 3.4.0, \u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u043e \u0448\u0435\u0441\u0442\u044c \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439.\" 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