{"id":84601,"date":"2020-06-09T13:42:13","date_gmt":"2020-06-09T11:42:13","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-gnutls-pozvolyayushhaya-vozobnovit-seans-tls-1-3-bez-znaniya-klyucha"},"modified":"2020-06-09T13:42:13","modified_gmt":"2020-06-09T11:42:13","slug":"uyazvimost-v-gnutls-pozvolyayushhaya-vozobnovit-seans-tls-1-3-bez-znaniya-klyucha","status":"publish","type":"post","link":"https:\/\/prohoster.info\/nl\/blog\/news\/uyazvimost-v-gnutls-pozvolyayushhaya-vozobnovit-seans-tls-1-3-bez-znaniya-klyucha","title":{"rendered":"Kwetsbaarheid in GnuTLS, waarmee een TLS 1.3-sessie kan worden hersteld zonder de sleutel te kennen","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>In de GnuTLS-bibliotheek, die standaard wordt gebruikt in veel pakketten van Debian, inclusief de pakketmanager APT en vele hulpprogramma's, <noindex><a rel=\"nofollow\" href=\"https:\/\/gnutls.org\/security-new.html#GNUTLS-SA-2020-06-03\">gedetecteerd<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/bugzilla.redhat.com\/show_bug.cgi?id=1843723\">kwetsbaarheid<\/a><\/noindex> (<noindex><a rel=\"nofollow\" href=\"https:\/\/security-tracker.debian.org\/tracker\/CVE-2020-13777\">CVE-2020-13777<\/a><\/noindex>), die het mogelijk maakt om een eerder gestopt TLS-sessie te hervatten zonder kennis van de sessiesleutel. Praktisch gezien kan de kwetsbaarheid worden gebruikt voor het uitvoeren van MITM-aanvallen. <\/p>\n<p>De kwetsbaarheid wordt veroorzaakt door een onjuiste constructie van de sessieticket-sleutel \u2014 de TLS-server koppelde de sessiesleutel voor encryptie niet aan de waarde die door de applicatie werd doorgegeven. Tot de eerste rotatie van de sleutel blijft de TLS-server onjuiste gegevens gebruiken bij het genereren van sessiesleutels in plaats van de encryptiesleutel die van de applicatie is ontvangen, waardoor een aanvaller de authenticatie in TLS 1.3 kan omzeilen en eerdere sessies in TLS 1.2 kan herstarten.<\/p>\n<p>Kwetsbaarheid <noindex><a rel=\"nofollow\" href=\"https:\/\/lists.gnupg.org\/pipermail\/gnutls-help\/2020-June\/004648.html\">opgelost<\/a><\/noindex> in versie 3.6.14, waarin ook is opgelost <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=53061\">van het probleem<\/a><\/noindex> met de verwerking van kruisgewijs ondertekende certificaten, die zijn opgedoken na het verouderen van het rootcertificaat AddTrust. Het probleem doet zich voor vanaf versie 3.6.4 (2018-09-24). In de distributies is de kwetsbaarheid verholpen in <noindex><a rel=\"nofollow\" href=\"https:\/\/security-tracker.debian.org\/tracker\/CVE-2020-13777\">Debian<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/www.suse.com\/security\/cve\/CVE-2020-13777\/\">SUSE<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/www.vuxml.org\/freebsd\/ef5b4f5f-a658-11ea-80d7-001cc0382b2f.html\">FreeBSD<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/bodhi.fedoraproject.org\/updates\/?releases=F32&#038;type=security\">Fedora<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/people.canonical.com\/~ubuntu-security\/cve\/2020\/CVE-2020-13777.html\">Ubuntu<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/bugzilla.redhat.com\/show_bug.cgi?id=1843726\">EPEL<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/access.redhat.com\/security\/cve\/CVE-2020-13777\">RHEL 8<\/a><\/noindex> (RHEL 6 en 7 <noindex><a rel=\"nofollow\" href=\"https:\/\/bugzilla.redhat.com\/show_bug.cgi?id=CVE-2020-13777\">zijn niet kwetsbaar<\/a><\/noindex>).<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Bron: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=53120\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0435 GnuTLS, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u0432\u043e \u043c\u043d\u043e\u0433\u0438\u0445 \u043f\u0430\u043a\u0435\u0442\u0430\u0445 \u0438\u0437 \u0441\u043e\u0441\u0442\u0430\u0432\u0430 Debian, \u0432\u043a\u043b\u044e\u0447\u0430\u044f \u043f\u0430\u043a\u0435\u0442\u043d\u044b\u0439 \u043c\u0435\u043d\u0435\u0434\u0436\u0435\u0440 APT \u0438 \u043c\u043d\u043e\u0433\u0438\u0435 \u0443\u0442\u0438\u043b\u0438\u0442\u044b, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2020-13777), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0432\u043e\u0437\u043e\u0431\u043d\u043e\u0432\u0438\u0442\u044c \u0440\u0430\u043d\u0435\u0435 \u043e\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u043d\u044b\u0439 \u0441\u0435\u0430\u043d\u0441 TLS \u0431\u0435\u0437 \u0437\u043d\u0430\u043d\u0438\u044f \u0441\u0435\u0441\u0441\u0438\u043e\u043d\u043d\u043e\u0433\u043e \u043a\u043b\u044e\u0447\u0430. \u0421 \u043f\u0440\u0430\u043a\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u0441\u0442\u043e\u0440\u043e\u043d\u044b \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0442\u044c\u0441\u044f \u0434\u043b\u044f \u043e\u0441\u0443\u0449\u0435\u0441\u0442\u0432\u043b\u0435\u043d\u0438\u044f MITM-\u0430\u0442\u0430\u043a. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u043d\u0435\u043a\u043e\u0440\u0440\u0435\u043a\u0442\u043d\u044b\u043c \u043f\u043e\u0441\u0442\u0440\u043e\u0435\u043d\u0438\u0435\u043c \u0441\u0435\u0441\u0441\u0438\u043e\u043d\u043d\u043e\u0433\u043e ticket-\u043a\u043b\u044e\u0447\u0430 &#8212; TLS-\u0441\u0435\u0440\u0432\u0435\u0440 \u043d\u0435 \u043e\u0441\u0443\u0449\u0435\u0441\u0442\u0432\u043b\u044f\u043b \u043f\u0440\u0438\u0432\u044f\u0437\u043a\u0443 \u0441\u0435\u0441\u0441\u0438\u043e\u043d\u043d\u043e\u0433\u043e \u043a\u043b\u044e\u0447\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-84601","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0435 GnuTLS, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u0432\u043e \u043c\u043d\u043e\u0433\u0438\u0445 \u043f\u0430\u043a\u0435\u0442\u0430\u0445 \u0438\u0437 \u0441\u043e\u0441\u0442\u0430\u0432\u0430 Debian, \u0432\u043a\u043b\u044e\u0447\u0430\u044f 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