{"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\/novosti-interneta\/opublikovan-exim-4-92-3-s-ustraneniem-chetvyortoj-za-god-kriticheskoj-uyazvimosti","title":{"rendered":"Exim 4.92.3 wurde ver\u00f6ffentlicht, das die vierte kritische Sicherheitsanf\u00e4lligkeit in diesem Jahr behebt.","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> Notfall-Release des Mailservers <noindex><a rel=\"nofollow\" href=\"https:\/\/www.exim.org\/\">Exim 4.92.3<\/a><\/noindex> mit Behebung 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 Ausf\u00fchrung von Code auf dem Server \u00fcber das Senden einer speziell gestalteten Zeichenkette im EHLO-Befehl von au\u00dfen erm\u00f6glicht. Die Schwachstelle tritt nach dem Privilegienentzug auf und ist auf die Ausf\u00fchrung von Code mit den Rechten eines nicht privilegierten Benutzers, unter dem der eingehende Nachrichtenhandler ausgef\u00fchrt wird, beschr\u00e4nkt.<\/p>\n<p>Das Problem tritt nur in der Exim-4.92-Baureihe (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 Sicherheitsanf\u00e4lligkeit wird durch einen Puffer\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> erlaubt einen Absturz durch das Senden einer langen Zeichenkette (mehrere Kilobyte) im EHLO-Befehl, jedoch kann die Schwachstelle auch \u00fcber andere Befehle ausgenutzt werden und k\u00f6nnte potenziell zur Ausf\u00fchrung von Code verwendet werden.<\/p>\n<p>Es gibt keine Umgehungsm\u00f6glichkeiten zur Blockierung der Sicherheitsanf\u00e4lligkeit, daher wird allen Nutzern dringend geraten, das Update unverz\u00fcglich zu installieren. <noindex><a rel=\"nofollow\" href=\"https:\/\/git.exim.org\/exim.git\/patch\/478effbfd9c3cc5a627fc671d4bf94d13670d65f\">Patch<\/a><\/noindex> oder sicherzustellen, dass die bereitgestellten Distributionen Pakete verwenden, in denen die Korrekturen aktueller Sicherheitsanf\u00e4lligkeiten implementiert sind. 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\">, aber bisher ist er noch nicht in<\/a><\/noindex>. RHEL und CentOS sind nicht betroffen, da Exim nicht in deren regul\u00e4re Repositorys aufgenommen ist (in <noindex><a rel=\"nofollow\" href=\"https:\/\/fedoraproject.org\/wiki\/EPEL\">EPEL7<\/a><\/noindex> das Update ist bisher <noindex><a rel=\"nofollow\" href=\"https:\/\/dl.fedoraproject.org\/pub\/epel\/7\/SRPMS\/Packages\/e\/\">nicht vorhanden<\/a><\/noindex>). In SUSE\/openSUSE tritt die Verwundbarkeit aufgrund der Verwendung von 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-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - 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 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 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content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/de\/blog\/novosti-interneta\/opublikovan-exim-4-92-3-s-ustraneniem-chetvyortoj-za-god-kriticheskoj-uyazvimosti\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"de_DE\" \/>\n\t\t<meta property=\"og:site_name\" content=\"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\ud83e\udd47\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d Exim 4.92.3 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c \u0447\u0435\u0442\u0432\u0451\u0440\u0442\u043e\u0439 \u0437\u0430 \u0433\u043e\u0434 \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 | ProHoster\" \/>\n\t\t<meta property=\"og: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 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 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Behebung der vierten kritischen Sicherheitsanf\u00e4lligkeit in diesem Jahr | ProHoster","description":"Ein dringendes Update des Mailservers Exim 4.92.3 wurde ver\u00f6ffentlicht, das eine weitere kritische Sicherheitsanf\u00e4lligkeit (CVE-2019-16928) behebt, die potenziell erm\u00f6glicht, dass schadhafter Code remote auf dem Server ausgef\u00fchrt wird, indem eine speziell formatierte Zeichenkette im EHLO-Befehl \u00fcbermittelt wird. Die Verwundbarkeit tritt nach dem Zur\u00fccksetzen von Berechtigungen auf und ist auf die Ausf\u00fchrung von Code mit den Rechten eines nicht privilegierten Benutzers beschr\u00e4nkt, unter dem der eingehende Nachrichtenhandler l\u00e4uft. Das Problem tritt nur in der Version auf","canonical_url":"https:\/\/prohoster.info\/de\/blog\/novosti-interneta\/opublikovan-exim-4-92-3-s-ustraneniem-chetvyortoj-za-god-kriticheskoj-uyazvimosti","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"de_DE","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d Exim 4.92.3 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c \u0447\u0435\u0442\u0432\u0451\u0440\u0442\u043e\u0439 \u0437\u0430 \u0433\u043e\u0434 \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 | ProHoster","og:description":"\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 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