{"id":111480,"date":"2023-11-13T15:10:13","date_gmt":"2023-11-13T13:10:13","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimosti-v-openvpn-i-softether-vpn"},"modified":"2023-11-13T15:10:13","modified_gmt":"2023-11-13T13:10:13","slug":"uyazvimosti-v-openvpn-i-softether-vpn","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/uyazvimosti-v-openvpn-i-softether-vpn","title":{"rendered":"Vulnerabilities in OpenVPN and SoftEther VPN","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>The release of OpenVPN 2.6.7 has been prepared, a package for creating virtual private networks that allows for encrypted connections between two client machines or the operation of a centralized VPN server for multiple clients simultaneously. In the new version, two vulnerabilities have been addressed:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2023-46850 \u2014 odwo\u0142anie do pami\u0119ci po jej zwolnieniu (use-after-free) mo\u017ce prowadzi\u0107 do wysy\u0142ania do drugiej strony po\u0142\u0105czenia zawarto\u015bci pami\u0119ci procesu, a tak\u017ce potencjalnie do zdalnego wykonania kodu. Problem wyst\u0119puje w konfiguracjach u\u017cywaj\u0105cych TLS (uruchamianych bez parametru \u201e--secret\u201d).\n<li class=\"l\"> CVE-2023-46849 \u2014 wyst\u0105pienie sytuacji dzielenia przez zero mo\u017ce prowadzi\u0107 do zdalnego inicjowania awaryjnego zako\u0144czenia serwera dost\u0119pu w konfiguracjach korzystaj\u0105cych z opcji \u201e--fragment\u201d.    <\/ul>\n<p>Changes in OpenVPN 2.6.7 not related to security:  <\/p>\n<ul>\n<li class=\"l\"> Dodano ostrze\u017cenie przy wysy\u0142aniu przez drug\u0105 stron\u0119 pakiet\u00f3w DATA_V1 podczas pr\u00f3by po\u0142\u0105czenia klienta OpenVPN 2.6.x z niekompatybilnymi serwerami opartymi na wersjach 2.4.0-2.4.4 (aby wyeliminowa\u0107 niekompatybilno\u015b\u0107, mo\u017cna u\u017cy\u0107 opcji \u201e--disable-dco\u201d).\n<li class=\"l\"> The outdated method linked to OpenSSL 1.x, which uses the OpenSSL Engine to load keys, has been removed. The reason given is the author's unwillingness to re-license the code with new binding exceptions.\n<li class=\"l\"> A warning has been added when a p2p NCP client connects to <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pl\/server\/dts-shicago\/\"   title=\"serwera\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2912\">serwera<\/a> p2mp (a combination used for operation without cipher negotiation), as there are issues when using version 2.6.x on both sides of the connection.\n<li class=\"l\"> Dodano ostrze\u017cenie, \u017ce flaga \u201e--show-groups\u201d nie wy\u015bwietla wszystkich obs\u0142ugiwanych grup.\n<li class=\"l\"> W parametrze \u201e--dns\u201d usuni\u0119to obs\u0142ug\u0119 argumentu \u201eexclude-domains\u201d, kt\u00f3ry pojawi\u0142 si\u0119 w ga\u0142\u0119zi 2.6, ale wci\u0105\u017c nie jest obs\u0142ugiwany przez backendy.\n<li class=\"l\"> A warning has been added, shown if the INFO control message is too large and cannot be redirected to the client.\n<li class=\"l\"> Support for the CMake build system has been added for builds using MinGW and MSVC. Support for the old MSVC build system has been removed.  <\/ul>\n<p>Additionally, the discovery of 9 vulnerabilities in open source software can be noted. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pl\/vpn\/\"   title=\"VPN\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"213\">VPN<\/a>-serwerze SoftEther. Jednej z problem\u00f3w (CVE-2023-27395) przypisano krytyczny poziom zagro\u017cenia \u2014 luka spowodowana jest przepe\u0142nieniem bufora i mo\u017ce prowadzi\u0107 do zdalnego wykonania kodu po stronie klienta podczas pr\u00f3by po\u0142\u0105czenia z serwerem kontrolowanym przez przest\u0119pc\u0119. Luka zosta\u0142a usuni\u0119ta w czerwcowej aktualizacji SoftEther VPN 4.42 Build 9798 RTM. Jeszcze dwie luki (CVE-2023-32634, CVE-2023-27516) umo\u017cliwiaj\u0105 uzyskanie nieautoryzowanego dost\u0119pu do sesji VPN podczas ataku MITM poprzez zastosowanie domy\u015blnych po\u015bwiadcze\u0144 dla serwera RPC. Luki zosta\u0142y usuni\u0119te w formie \u0142atki.    <\/p>\n<p>Podatno\u015bci CVE-2023-31192 i CVE-2023-32275 (\u0142atka) mog\u0105 prowadzi\u0107 do wycieku poufnych informacji w niekt\u00f3rych pakietach w wyniku atak\u00f3w MITM. Pozosta\u0142e 4 podatno\u015bci (CVE-2023-22325, CVE-2023-23581, CVE-2023-22308 i CVE-2023-25774) mog\u0105 by\u0107 stosowane do wywo\u0142ania odmowy us\u0142ugi, na przyk\u0142ad do wymuszenia zerwania po\u0142\u0105czenia lub awaryjnego zako\u0144czenia pracy klienta. W kodzie \u017ar\u00f3d\u0142owym SoftEther VPN niedawno wprowadzono poprawk\u0119 7 podatno\u015bci, o kt\u00f3rych szczeg\u00f3\u0142y s\u0105 jeszcze nieznane.<br \/>\n<br \/>\u0179r\u00f3d\u0142o: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=60103\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043b\u0435\u043d \u0432\u044b\u043f\u0443\u0441\u043a OpenVPN 2.6.7, \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. \u0412 \u043d\u043e\u0432\u043e\u0439 \u0432\u0435\u0440\u0441\u0438\u0438 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0434\u0432\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438: CVE-2023-46850 &#8212; \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u0435 \u043a \u043e\u0431\u043b\u0430\u0441\u0442\u0438 \u043f\u0430\u043c\u044f\u0442\u0438 \u043f\u043e\u0441\u043b\u0435 \u0435\u0451 \u043e\u0441\u0432\u043e\u0431\u043e\u0436\u0434\u0435\u043d\u0438\u044f (use-after-free) \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0435 \u043d\u0430 \u0434\u0440\u0443\u0433\u0443\u044e \u0441\u0442\u043e\u0440\u043e\u043d\u0443 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u044f \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0433\u043e \u043f\u0430\u043c\u044f\u0442\u0438 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0430, [&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-111480","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=\"\u041f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043b\u0435\u043d \u0432\u044b\u043f\u0443\u0441\u043a OpenVPN 2.6.7, \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 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