{"id":38530,"date":"2019-10-31T22:24:20","date_gmt":"2019-10-31T19:24:20","guid":{"rendered":"https:\/\/prohoster.info\/blog\/opublikovan-exim-4-92-3-s-ustraneniem-chetvyortoj-za-god-kriticheskoj-uyazvimosti\/"},"modified":"2019-10-31T22:24:20","modified_gmt":"2019-10-31T19:24:20","slug":"opublikovan-exim-4-92-3-s-ustraneniem-chetvyortoj-za-god-kriticheskoj-uyazvimosti","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/opublikovan-exim-4-92-3-s-ustraneniem-chetvyortoj-za-god-kriticheskoj-uyazvimosti","title":{"rendered":"Pubblicato Exim 4.92.3 con la risoluzione del quarto problema critico dell'anno.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Pubblicato<\/a><\/noindex> versione di emergenza del server di posta Exim 4.92.3<\/a><\/noindex> risolvendo un ulteriore vulnerabilit\u00e0 critico<\/a><\/noindex> (CVE-2019-16928<\/a><\/noindex>), che potrebbe consentire l'esecuzione remota del proprio codice sul server attraverso l'invio di una stringa appositamente formattata nel comando EHLO. La vulnerabilit\u00e0 si manifesta dopo il ripristino dei privilegi e \u00e8 limitata all'esecuzione di codice con i diritti di un utente non privilegiato, sotto cui viene eseguito il gestore dei messaggi in arrivo.<\/p>\n

Il problema si manifesta solo nella serie Exim 4.92 (4.92.0, 4.92.1 e 4.92.2) e non \u00e8 correlato alla vulnerabilit\u00e0 risolta all'inizio del mese CVE-2019-15846<\/a><\/noindex>. La vulnerabilit\u00e0 \u00e8 causata da un overflow del buffer nella funzione string_vformat()<\/a><\/noindex>, definita nel file string.c. L'exploit dimostrato sfrutta<\/a><\/noindex> permette di causare un crash inviando una stringa lunga (alcuni kilobyte) nel comando EHLO, ma la vulnerabilit\u00e0 pu\u00f2 essere sfruttata anche tramite altri comandi e potrebbe potenzialmente essere utilizzata per l'esecuzione di codice.<\/p>\n

Non ci sono modalit\u00e0 per bloccare la vulnerabilit\u00e0, quindi si raccomanda a tutti gli utenti di installare urgentemente l'aggiornamento. per correggere l'errore.<\/a><\/noindex> o assicurarsi di utilizzare i pacchetti forniti dalle distribuzioni, che includono le correzioni delle vulnerabilit\u00e0 attuali. La correzione \u00e8 stata pubblicata per Ubuntu<\/a><\/noindex> (riguarda solo il ramo 19.04), Arch Linux<\/a><\/noindex>, FreeBSD<\/a><\/noindex>, Debian<\/a><\/noindex> (riguarda solo Debian 10 Buster) e Fedora<\/a><\/noindex>. RHEL e CentOS non sono affetti poich\u00e9 Exim non \u00e8 incluso nel loro repository di pacchetti (in EPEL7<\/a><\/noindex> l'aggiornamento \u00e8 ancora \u00e8 assente<\/a><\/noindex>). In SUSE\/openSUSE la vulnerabilit\u00e0 non si manifesta a causa dell'uso del ramo Exim 4.88.<\/p>\n

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

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

\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u044d\u043a\u0441\u0442\u0440\u0435\u043d\u043d\u044b\u0439 \u0432\u044b\u043f\u0443\u0441\u043a \u043f\u043e\u0447\u0442\u043e\u0432\u043e\u0433\u043e \u0441\u0435\u0440\u0432\u0435\u0440\u0430 Exim 4.92.3 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c \u043e\u0447\u0435\u0440\u0435\u0434\u043d\u043e\u0439 \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (CVE-2019-16928), \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0439 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u0441\u0432\u043e\u0439 \u043a\u043e\u0434 \u043d\u0430 \u0441\u0435\u0440\u0432\u0435\u0440\u0435 \u0447\u0435\u0440\u0435\u0437 \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0443 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u043e\u0439 \u0441\u0442\u0440\u043e\u043a\u0438 \u0432 \u043a\u043e\u043c\u0430\u043d\u0434\u0435 EHLO. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043d\u0430 \u0441\u0442\u0430\u0434\u0438\u0438 \u043f\u043e\u0441\u043b\u0435 \u0441\u0431\u0440\u043e\u0441\u0430 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0439 \u0438 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0430 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435\u043c \u043a\u043e\u0434\u0430 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 \u043d\u0435\u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f, \u043f\u043e\u0434 \u043a\u043e\u0442\u043e\u0440\u044b\u043c \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0435\u0442\u0441\u044f \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a \u043f\u043e\u0441\u0442\u0443\u043f\u0430\u044e\u0449\u0438\u0445 \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u0439. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0442\u043e\u043b\u044c\u043a\u043e \u0432 \u0432\u0435\u0442\u043a\u0435 […]<\/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-38530","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"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\udd47Pubblicato Exim 4.92.3 con la soluzione della quarta vulnerabilit\u00e0 critica dell'anno | ProHoster","description":"Pubblicata una release urgente del server di posta Exim 4.92.3 con la correzione di un'altra vulnerabilit\u00e0 critica (CVE-2019-16928), che potrebbe consentire l'esecuzione remota di codice sul server tramite la trasmissione di una stringa appositamente formattata nel comando EHLO. La vulnerabilit\u00e0 si manifesta dopo il ripristino dei privilegi ed \u00e8 limitata all'esecuzione di codice con i diritti di un utente non privilegiato sotto cui viene eseguito il gestore dei messaggi in arrivo. Il problema si manifesta solo nel ramo","canonical_url":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/opublikovan-exim-4-92-3-s-ustraneniem-chetvyortoj-za-god-kriticheskoj-uyazvimosti","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\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d Exim 4.92.3 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c \u0447\u0435\u0442\u0432\u0451\u0440\u0442\u043e\u0439 \u0437\u0430 \u0433\u043e\u0434 \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u0439 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\u0447\u0435\u0440\u0435\u0437 \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0443 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u043e\u0439 \u0441\u0442\u0440\u043e\u043a\u0438 \u0432 \u043a\u043e\u043c\u0430\u043d\u0434\u0435 EHLO. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043d\u0430 \u0441\u0442\u0430\u0434\u0438\u0438 \u043f\u043e\u0441\u043b\u0435 \u0441\u0431\u0440\u043e\u0441\u0430 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0439 \u0438 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0430 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435\u043c \u043a\u043e\u0434\u0430 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 \u043d\u0435\u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e 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