{"id":181813,"date":"2026-05-30T20:48:06","date_gmt":"2026-05-30T18:48:07","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/obnovlenie-exim-4-99-4-s-ustraneniem-uyazvimosti-privodyashhej-k-utechke-pamyati"},"modified":"2026-05-30T20:48:06","modified_gmt":"2026-05-30T18:48:07","slug":"obnovlenie-exim-4-99-4-s-ustraneniem-uyazvimosti-privodyashhej-k-utechke-pamyati","status":"publish","type":"post","link":"https:\/\/prohoster.info\/de\/blog\/news\/obnovlenie-exim-4-99-4-s-ustraneniem-uyazvimosti-privodyashhej-k-utechke-pamyati","title":{"rendered":"Das Update Exim 4.99.4 behebt eine Sicherheitsanf\u00e4lligkeit, die zu einem Speicherleck f\u00fchren kann.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Ein korrigiertes Update des Mailservers Exim 4.99.4 wurde ver\u00f6ffentlicht, das eine Sicherheitsanf\u00e4lligkeit (CVE-2026-48840) behebt, die zu einem Leak von 16 uninitialisierten Bytes aus dem Stack des Prozesshandlers in den vom Client erhaltenen Informationen zur IPv6-Adresse im SMTP Hello-Header f\u00fchren kann. In der Praxis kann das behobene Leak bei der Ausnutzung anderer Sicherheitsanf\u00e4lligkeiten verwendet werden, um das Speicherlayout in Konfigurationen mit Adressrandomisierung (ASLR) zu bestimmen. <\/p>\n<p>Das Problem tritt ab der Version Exim 4.88 (2017) in Systemen auf, die die hosts_proxy-Einstellung verwenden und Exim-Versionen nutzen, die mit der OPTION SUPPORT_PROXY (standardm\u00e4\u00dfig in Debian, Ubuntu, RHEL EPEL und Fedora) kompiliert wurden. Die Sicherheitsanf\u00e4lligkeit resultiert aus fehlender ordnungsgem\u00e4\u00dfer \u00dcberpr\u00fcfung der Framegr\u00f6\u00dfe bei der Verarbeitung von Anfragen mittels des PROXYv2-Protokolls.<br \/>\n<br \/>Quelle: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=65575\">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 \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0439 \u0432\u044b\u043f\u0443\u0441\u043a \u043f\u043e\u0447\u0442\u043e\u0432\u043e\u0433\u043e \u0441\u0435\u0440\u0432\u0435\u0440\u0430 Exim 4.99.4, \u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2026-48840), \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0430\u044f \u043a \u0443\u0442\u0435\u0447\u043a\u0435 16 \u043d\u0435\u0438\u043d\u0438\u0446\u0438\u0430\u043b\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u0431\u0430\u0439\u0442 \u0438\u0437 \u0441\u0442\u0435\u043a\u0430 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0430-\u043e\u0431\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0430 \u0432 \u043e\u0442\u0434\u0430\u0432\u0430\u0435\u043c\u043e\u0439 \u043a\u043b\u0438\u0435\u043d\u0442\u0443 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438 \u043e\u0431 \u0430\u0434\u0440\u0435\u0441\u0435 IPv6 \u0432 \u0437\u0430\u0433\u043e\u043b\u043e\u0432\u043a\u0435 SMTP Hello. \u041d\u0430 \u043f\u0440\u0430\u043a\u0442\u0438\u043a\u0435 \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u043d\u0430\u044f \u0443\u0442\u0435\u0447\u043a\u0430 \u043c\u043e\u0436\u0435\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c\u0441\u044f \u043f\u0440\u0438 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0434\u0440\u0443\u0433\u0438\u0445 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u0434\u043b\u044f \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u044f \u0440\u0430\u0441\u043a\u043b\u0430\u0434\u043a\u0438 \u043f\u0430\u043c\u044f\u0442\u0438 \u0432 \u043a\u043e\u043d\u0444\u0438\u0433\u0443\u0440\u0430\u0446\u0438\u044f\u0445 \u0441 \u0440\u0430\u043d\u0434\u043e\u043c\u0438\u0437\u0430\u0446\u0438\u0435\u0439 \u0430\u0434\u0440\u0435\u0441\u043e\u0432 (ASLR). \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043d\u0430\u0447\u0438\u043d\u0430\u044f [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-181813","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 \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0439 \u0432\u044b\u043f\u0443\u0441\u043a \u043f\u043e\u0447\u0442\u043e\u0432\u043e\u0433\u043e \u0441\u0435\u0440\u0432\u0435\u0440\u0430 Exim 4.99.4, \u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2026-48840), 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Sicherheitsanf\u00e4lligkeit, die zu Speicherlecks f\u00fchrt | ProHoster","description":"Ein korrigiertes Update des Mailservers Exim 4.99.4 wurde ver\u00f6ffentlicht, das eine Sicherheitsanf\u00e4lligkeit (CVE-2026-48840) behebt, die zu einem Leak von 16 uninitialisierten Bytes aus dem Stack des Prozesshandlers in den an den Client gesendeten Informationen f\u00fchrt.","canonical_url":"https:\/\/prohoster.info\/de\/blog\/news\/obnovlenie-exim-4-99-4-s-ustraneniem-uyazvimosti-privodyashhej-k-utechke-pamyati","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 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