{"id":38530,"date":"2019-10-31T22:24:20","date_gmt":"2019-10-31T19:24:20","guid":{"rendered":"https:\/\/prohoster.info\/blog\/opublikovan-exim-4-92-3-s-ustraneniem-chetvyortoj-za-god-kriticheskoj-uyazvimosti\/"},"modified":"2019-10-31T22:24:20","modified_gmt":"2019-10-31T19:24:20","slug":"opublikovan-exim-4-92-3-s-ustraneniem-chetvyortoj-za-god-kriticheskoj-uyazvimosti","status":"publish","type":"post","link":"https:\/\/prohoster.info\/de\/blog\/news\/opublikovan-exim-4-92-3-s-ustraneniem-chetvyortoj-za-god-kriticheskoj-uyazvimosti","title":{"rendered":"Exim 4.92.3 mit der Behebung der vierten kritischen Sicherheitsanf\u00e4lligkeit des Jahres ver\u00f6ffentlicht.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/lists.exim.org\/lurker\/message\/20190928.232024.589b2ef5.en.html\">Ver\u00f6ffentlicht<\/a><\/noindex> au\u00dferordentliche Ausgabe des Mailservers <noindex><a rel=\"nofollow\" href=\"https:\/\/www.exim.org\/\">Exim 4.92.3<\/a><\/noindex> unter Beseitigung einer weiteren <noindex><a rel=\"nofollow\" href=\"http:\/\/exim.org\/static\/doc\/security\/CVE-2019-16928.txt\">kritischen Sicherheitsanf\u00e4lligkeit<\/a><\/noindex> (<noindex><a rel=\"nofollow\" href=\"https:\/\/security-tracker.debian.org\/tracker\/CVE-2019-16928\">CVE-2019-16928<\/a><\/noindex>), die potenziell die M\u00f6glichkeit bietet, aus der Ferne eigenen Code auf dem Server durch das Senden einer speziell formatierten Zeichenfolge im Befehl EHLO auszuf\u00fchren. Die Schwachstelle tritt nach dem Privilegienr\u00fcckfall auf und ist auf die Ausf\u00fchrung des Codes mit den Rechten eines nicht privilegierten Benutzers beschr\u00e4nkt, unter dem der Handler f\u00fcr eingehende Nachrichten ausgef\u00fchrt wird.<\/p>\n<p>Das Problem tritt nur in der Version Exim 4.92 (4.92.0, 4.92.1 und 4.92.2) auf und \u00fcberschneidet sich nicht mit der zu Beginn des Monats behobenen Schwachstelle <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51435\">CVE-2019-15846<\/a><\/noindex>. Die Schwachstelle wird durch einen Buffer\u00fcberlauf in der Funktion <noindex><a rel=\"nofollow\" href=\"https:\/\/git.exim.org\/exim.git\/blob\/cf84d126bc:\/src\/src\/string.c#l1287\">string_vformat()<\/a><\/noindex>, die in der Datei string.c definiert ist, verursacht. Der demonstrierte <noindex><a rel=\"nofollow\" href=\"https:\/\/git.exim.org\/exim.git\/patch\/478effbfd9c3cc5a627fc671d4bf94d13670d65f\">Exploit<\/a><\/noindex> erm\u00f6glicht einen Absturz durch das Senden einer langen Zeichenfolge (mehrere Kilobyte) im Befehl EHLO, die Schwachstelle kann jedoch auch \u00fcber andere Befehle ausgenutzt werden und k\u00f6nnte potenziell f\u00fcr die Ausf\u00fchrung von Code verwendet werden.<\/p>\n<p>Umgehungen zur Blockierung der Schwachstelle existieren nicht, daher wird allen Nutzern dringend geraten, das Update umgehend zu installieren, anzuwenden <noindex><a rel=\"nofollow\" href=\"https:\/\/git.exim.org\/exim.git\/patch\/478effbfd9c3cc5a627fc671d4bf94d13670d65f\">Patch<\/a><\/noindex> oder sicherzustellen, dass die in den bereitgestellten Distributionen verf\u00fcgbaren Pakete verwendet werden, die die aktuellen Schwachstellenbehebungen beinhalten. Der Fix wurde f\u00fcr <noindex><a rel=\"nofollow\" href=\"https:\/\/usn.ubuntu.com\/4141-1\/\">Ubuntu<\/a><\/noindex> (betrifft nur die Version 19.04), <noindex><a rel=\"nofollow\" href=\"https:\/\/www.archlinux.org\/packages\/?q=exim\">Arch Linux<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"http:\/\/www.vuxml.org\/freebsd\/e917caba-e291-11e9-89f1-152fed202bb7.html\">FreeBSD<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/security-tracker.debian.org\/tracker\/CVE-2019-16928\">Debian<\/a><\/noindex> (betrifft nur Debian 10 Buster) und <noindex><a rel=\"nofollow\" href=\"https:\/\/bodhi.fedoraproject.org\/updates\/?search=exim\">Fedora<\/a><\/noindex>. RHEL und CentOS sind nicht betroffen, da Exim nicht in ihrem Standard-Paketrepository enthalten ist (in <noindex><a rel=\"nofollow\" href=\"https:\/\/fedoraproject.org\/wiki\/EPEL\">EPEL7<\/a><\/noindex> ist das Update bisher <noindex><a rel=\"nofollow\" href=\"https:\/\/dl.fedoraproject.org\/pub\/epel\/7\/SRPMS\/Packages\/e\/\">komplett.<\/a><\/noindex>). In SUSE\/openSUSE tritt die Schwachstelle aufgrund der Verwendung der Version Exim 4.88 nicht auf.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Quelle: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51590\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u044d\u043a\u0441\u0442\u0440\u0435\u043d\u043d\u044b\u0439 \u0432\u044b\u043f\u0443\u0441\u043a \u043f\u043e\u0447\u0442\u043e\u0432\u043e\u0433\u043e \u0441\u0435\u0440\u0432\u0435\u0440\u0430 Exim 4.92.3 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c \u043e\u0447\u0435\u0440\u0435\u0434\u043d\u043e\u0439 \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (CVE-2019-16928), \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0439 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u0441\u0432\u043e\u0439 \u043a\u043e\u0434 \u043d\u0430 \u0441\u0435\u0440\u0432\u0435\u0440\u0435 \u0447\u0435\u0440\u0435\u0437 \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0443 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u043e\u0439 \u0441\u0442\u0440\u043e\u043a\u0438 \u0432 \u043a\u043e\u043c\u0430\u043d\u0434\u0435 EHLO. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043d\u0430 \u0441\u0442\u0430\u0434\u0438\u0438 \u043f\u043e\u0441\u043b\u0435 \u0441\u0431\u0440\u043e\u0441\u0430 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0439 \u0438 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0430 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435\u043c \u043a\u043e\u0434\u0430 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 \u043d\u0435\u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f, \u043f\u043e\u0434 \u043a\u043e\u0442\u043e\u0440\u044b\u043c \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0435\u0442\u0441\u044f \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a \u043f\u043e\u0441\u0442\u0443\u043f\u0430\u044e\u0449\u0438\u0445 \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u0439. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0442\u043e\u043b\u044c\u043a\u043e \u0432 \u0432\u0435\u0442\u043a\u0435 [&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-38530","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=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u044d\u043a\u0441\u0442\u0440\u0435\u043d\u043d\u044b\u0439 \u0432\u044b\u043f\u0443\u0441\u043a \u043f\u043e\u0447\u0442\u043e\u0432\u043e\u0433\u043e \u0441\u0435\u0440\u0432\u0435\u0440\u0430\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" 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