Des versions correctives d'OpenVPN 2.5.2 et 2.4.11 ont \u00e9t\u00e9 pr\u00e9par\u00e9es, un paquet pour la cr\u00e9ation de r\u00e9seaux priv\u00e9s virtuels permettant d'\u00e9tablir une connexion chiffr\u00e9e entre deux machines clientes ou de faire fonctionner un serveur VPN centralis\u00e9 pour l'utilisation simultan\u00e9e de plusieurs clients. Le code d'OpenVPN est distribu\u00e9 sous la licence GPLv2, des paquets binaires pr\u00eats \u00e0 l'emploi sont disponibles pour Debian, Ubuntu, CentOS, RHEL et Windows. <\/p>\n
Les nouvelles versions corrigent une vuln\u00e9rabilit\u00e9 (CVE-2020-15078) qui permet \u00e0 un attaquant distant de contourner l'authentification et les restrictions d'acc\u00e8s, entra\u00eenant une fuite de donn\u00e9es sur les param\u00e8tres VPN. Le probl\u00e8me ne se manifeste que sur les serveurs configur\u00e9s pour utiliser l'authentification diff\u00e9r\u00e9e (deferred_auth). Dans certaines circonstances, un attaquant peut amener le serveur \u00e0 renvoyer un message PUSH_REPLY avec des donn\u00e9es sur les param\u00e8tres avant d'envoyer le message AUTH_FAILED. VPN<\/a> avant l'envoi du message AUTH_FAILED. En combinaison avec l'utilisation du param\u00e8tre \u00ab \u2014auth-gen-token \u00bb ou l'application par l'utilisateur d'un sch\u00e9ma d'authentification par jetons, la vuln\u00e9rabilit\u00e9 peut conduire \u00e0 un acc\u00e8s au VPN en utilisant un compte inactif. <\/p>\n Parmi les changements non li\u00e9s \u00e0 la s\u00e9curit\u00e9, on note l'\u00e9largissement de l'affichage des informations sur les chiffrages TLS convenus pour utilisation par le client et serveur<\/a>. Des informations correctes sur la prise en charge de TLS 1.3 et des certificats EC ont \u00e9galement \u00e9t\u00e9 ajout\u00e9es. De plus, l'absence de fichier CRL contenant la liste des certificats r\u00e9voqu\u00e9s lors du d\u00e9marrage d'OpenVPN est d\u00e9sormais interpr\u00e9t\u00e9e comme une erreur entra\u00eenant l'arr\u00eat du service. \u041f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043b\u0435\u043d\u044b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 OpenVPN 2.5.2 \u0438 2.4.11, \u043f\u0430\u043a\u0435\u0442\u0430 \u0434\u043b\u044f \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u0432\u0438\u0440\u0442\u0443\u0430\u043b\u044c\u043d\u044b\u0445 \u0447\u0430\u0441\u0442\u043d\u044b\u0445 \u0441\u0435\u0442\u0435\u0439, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0433\u043e \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u0448\u0438\u0444\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0435 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 \u043c\u0435\u0436\u0434\u0443 \u0434\u0432\u0443\u043c\u044f \u043a\u043b\u0438\u0435\u043d\u0442\u0441\u043a\u0438\u043c\u0438 \u043c\u0430\u0448\u0438\u043d\u0430\u043c\u0438 \u0438\u043b\u0438 \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0442\u044c \u0440\u0430\u0431\u043e\u0442\u0443 \u0446\u0435\u043d\u0442\u0440\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e VPN-\u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u0434\u043b\u044f \u043e\u0434\u043d\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439 \u0440\u0430\u0431\u043e\u0442\u044b \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u0438\u0445 \u043a\u043b\u0438\u0435\u043d\u0442\u043e\u0432. \u041a\u043e\u0434 OpenVPN \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 GPLv2, \u0433\u043e\u0442\u043e\u0432\u044b\u0435 \u0431\u0438\u043d\u0430\u0440\u043d\u044b\u0435 \u043f\u0430\u043a\u0435\u0442\u044b \u0444\u043e\u0440\u043c\u0438\u0440\u0443\u044e\u0442\u0441\u044f \u0434\u043b\u044f Debian, Ubuntu, CentOS, RHEL \u0438 Windows. \u0412 \u043d\u043e\u0432\u044b\u0445 \u0432\u044b\u043f\u0443\u0441\u043a\u0430\u0445 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2020-15078), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f 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Source : opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"