\u00c8 disponibile la versione strongSwan 5.9.10, un pacchetto libero per la creazione di connessioni VPN basate sul protocollo IPSec utilizzato in Linux, Android, FreeBSD e macOS. Nella nuova versione \u00e8 stata corretta una vulnerabilit\u00e0 critica (CVE-2023-26463), che potrebbe essere sfruttata per bypassare l'autenticazione, ma potrebbe anche portare all'esecuzione di codice da parte dell'attaccante sul lato server o client. Il problema si manifesta durante la verifica di certificati appositamente formattati nei metodi di autenticazione EAP (Extensible Authentication Protocol) basati su TLS. <\/p>\n
La vulnerabilit\u00e0 \u00e8 causata dal fatto che il gestore TLS accetta in modo errato le chiavi pubbliche dal certificato del nodo peer, considerandole affidabili, anche se il certificato non pu\u00f2 essere verificato con successo. In particolare, durante la chiamata della funzione tls_find_public_key(), per determinare i certificati affidabili, viene utilizzato un campionamento basato sul tipo di chiave pubblica. Il problema \u00e8 che la variabile utilizzata per determinare il tipo di chiave per l'operazione di ricerca viene impostata in ogni caso, anche se il certificato non \u00e8 affidabile. <\/p>\n
Inoltre, manipolando la chiave \u00e8 possibile ridurre il contatore dei riferimenti (se il certificato non \u00e8 affidabile, il riferimento all'oggetto viene rilasciato dopo la determinazione del tipo di chiave) e liberare la memoria sotto un altro oggetto chiave ancora utilizzato. Questa imperfezione non esclude la creazione di exploit per organizzare la perdita di informazioni dalla memoria e l'esecuzione di codice malevolo. <\/p>\n
L'attacco a un server<\/a> viene eseguito inviando un certificato auto firmato dal cliente per l'autenticazione del cliente utilizzando i metodi EAP-TLS, EAP-TTLS, EAP-PEAP e EAP-TNC. L'attacco al cliente pu\u00f2 essere realizzato restituendo server<\/a> un certificato appositamente formattato. La vulnerabilit\u00e0 si manifesta nelle versioni strongSwan 5.9.8 e 5.9.9. \u00c8 possibile seguire la pubblicazione degli aggiornamenti dei pacchetti nelle distribuzioni sulle seguenti pagine: Debian, Ubuntu, Gentoo, RHEL, SUSE, Arch, FreeBSD, NetBSD. \u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u0432\u044b\u043f\u0443\u0441\u043a strongSwan 5.9.10, \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0430\u043a\u0435\u0442\u0430 \u0434\u043b\u044f \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f VPN-\u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0439 \u043d\u0430 \u0431\u0430\u0437\u0435 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 IPSec, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c\u043e\u0433\u043e \u0432 Linux, Android, FreeBSD \u0438 macOS. \u0412 \u043d\u043e\u0432\u043e\u0439 \u0432\u0435\u0440\u0441\u0438\u0438 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u043e\u043f\u0430\u0441\u043d\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2023-26463), \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0430 \u0434\u043b\u044f \u043e\u0431\u0445\u043e\u0434\u0430 \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438, \u043d\u043e \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u0442\u0430\u043a\u0436\u0435 \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044e \u043a\u043e\u0434\u0430 \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0435\u0433\u043e \u043d\u0430 \u0441\u0442\u043e\u0440\u043e\u043d\u0435 \u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u0438\u043b\u0438 \u043a\u043b\u0438\u0435\u043d\u0442\u0430. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043f\u0440\u0438 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0435 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u044b\u0445 \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0432 […]<\/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-107077","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\udd47Vulnerabilit\u00e0 in strongSwan IPsec consente l'esecuzione remota di codice | 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Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"