{"id":87780,"date":"2020-07-10T01:42:17","date_gmt":"2020-07-09T23:42:17","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimosti-v-libc-i-ipv6-steke-freebsd"},"modified":"2020-07-10T01:42:17","modified_gmt":"2020-07-09T23:42:17","slug":"uyazvimosti-v-libc-i-ipv6-steke-freebsd","status":"publish","type":"post","link":"https:\/\/prohoster.info\/nl\/blog\/news\/uyazvimosti-v-libc-i-ipv6-steke-freebsd","title":{"rendered":"Kwetsbaarheden in libc en de IPv6-stack van FreeBSD","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>In FreeBSD zijn verschillende kwetsbaarheden verholpen die lokale gebruikers in staat stellen hun privileges in het systeem te verhogen:<\/p>\n<ul>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/lists.freebsd.org\/pipermail\/freebsd-announce\/2020-July\/001968.html\">CVE-2020-7458<\/a><\/noindex> \u2014 kwetsbaarheid in het posix_spawnp-mechanisme, aangeboden in libc voor het maken van processen, die kan worden misbruikt door een te grote waarde op te geven in de omgevingsvariabele PATH. Deze kwetsbaarheid kan leiden tot het schrijven van gegevens buiten het geheugenbereik dat is toegewezen voor de stack, en stelt een aanvaller in staat om de inhoud van daaropvolgende buffers met een gecontroleerde waarde te overschrijven.\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/lists.freebsd.org\/pipermail\/freebsd-announce\/2020-July\/001970.html\">CVE-2020-7457<\/a><\/noindex> \u2014 kwetsbaarheid in de IPv6-stack, die een lokale gebruiker in staat stelt om zijn code op kernel-niveau uit te voeren door manipulaties met de IPV6_2292PKTOPTIONS-optie voor de netwerk-socket.\n<li class=\"l\"> Opgeheven <noindex><a rel=\"nofollow\" href=\"https:\/\/lists.freebsd.org\/pipermail\/freebsd-announce\/2020-July\/001969.html\">twee kwetsbaarheden<\/a><\/noindex> (CVE-2020-12662, CVE-2020-12663) in de meegeleverde DNS-server <noindex><a rel=\"nofollow\" href=\"https:\/\/nlnetlabs.nl\/projects\/unbound\">Unbound<\/a><\/noindex>, waardoor een externe denial of service kan optreden bij toegang tot een door een aanvaller beheerde server of waardoor de DNS-server kan worden gebruikt als een traffic amplifier tijdens DDoS-aanvallen.\n<\/ul>\n<p>Daarnaast zijn er drie niet-beveiligingsproblemen (errata) verholpen die kunnen leiden tot kernelcrashes tijdens het gebruik van de stuurprogramma <noindex><a rel=\"nofollow\" href=\"https:\/\/lists.freebsd.org\/pipermail\/freebsd-announce\/2020-July\/001967.html\">mps<\/a><\/noindex> (bij het uitvoeren van het commando sas2ircu), subsystemen <noindex><a rel=\"nofollow\" href=\"https:\/\/lists.freebsd.org\/pipermail\/freebsd-announce\/2020-July\/001966.html\">LinuxKPI<\/a><\/noindex> (bij het doorsturen van X11) en hypervisor <noindex><a rel=\"nofollow\" href=\"https:\/\/lists.freebsd.org\/pipermail\/freebsd-announce\/2020-July\/001965.html\">bhyve<\/a><\/noindex> (bij het doorgeven van PCI-apparaten).<\/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=53317\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412\u043e FreeBSD \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u043e \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0445 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u043c\u0443 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044e \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u0441\u0432\u043e\u0438 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0438 \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435: CVE-2020-7458 &#8212; \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u0435 posix_spawnp, \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u043c\u043e\u043c \u0432 libc \u0434\u043b\u044f \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0432, \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0438\u0440\u0443\u0435\u043c\u0430\u044f \u0447\u0435\u0440\u0435\u0437 \u0443\u043a\u0430\u0437\u0430\u043d\u0438\u0435 \u0441\u043b\u0438\u0448\u043a\u043e\u043c \u0431\u043e\u043b\u044c\u0448\u043e\u0433\u043e \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u0432 \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439 \u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u0438 PATH. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u0437\u0430\u043f\u0438\u0441\u0438 \u0434\u0430\u043d\u043d\u044b\u0445 \u0437\u0430 \u043f\u0440\u0435\u0434\u0435\u043b\u044b \u043e\u0431\u043b\u0430\u0441\u0442\u0438 \u043f\u0430\u043c\u044f\u0442\u0438, \u0432\u044b\u0434\u0435\u043b\u0435\u043d\u043d\u043e\u0439 \u043f\u043e\u0434 \u0441\u0442\u0435\u043a, \u0438 \u0434\u0430\u0451\u0442 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u043f\u0435\u0440\u0435\u043f\u0438\u0441\u0430\u0442\u044c \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0435 \u0440\u0430\u0441\u043f\u043e\u043b\u043e\u0436\u0435\u043d\u043d\u044b\u0445 \u0441\u043b\u0435\u0434\u043e\u043c [&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-87780","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\u043e 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