{"id":78908,"date":"2020-04-23T01:41:59","date_gmt":"2020-04-22T23:41:59","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vo-freebsd-ustraneny-udalyonno-ekspluatiruemye-uyazvimosti-v-ipfw"},"modified":"2020-04-23T01:41:59","modified_gmt":"2020-04-22T23:41:59","slug":"vo-freebsd-ustraneny-udalyonno-ekspluatiruemye-uyazvimosti-v-ipfw","status":"publish","type":"post","link":"https:\/\/prohoster.info\/de\/blog\/news\/vo-freebsd-ustraneny-udalyonno-ekspluatiruemye-uyazvimosti-v-ipfw","title":{"rendered":"In FreeBSD wurden aus der Ferne ausnutzbare Sicherheitsanf\u00e4lligkeiten in ipfw behoben.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Im Paketfilter ipfw <noindex><a rel=\"nofollow\" href=\"https:\/\/lists.freebsd.org\/pipermail\/freebsd-announce\/2020-April\/001945.html\">behebt<\/a><\/noindex> wurden zwei Sicherheitsanf\u00e4lligkeiten im Code zur Analyse der TCP-Optionen aufgrund fehlerhafter Daten\u00fcberpr\u00fcfungen in den verarbeiteten Netzwerkpaketen festgestellt. Die erste Sicherheitsanf\u00e4lligkeit (CVE-2019-5614) kann bei der Verarbeitung bestimmter, speziell formatierter TCP-Pakete zu einem Zugriff auf den Speicher au\u00dferhalb des zugewiesenen mbuf-Puffers f\u00fchren, w\u00e4hrend die zweite (CVE-2019-15874) zu Zugriffen auf bereits freigegebene Speicherbereiche (use-after-free) f\u00fchren kann. <\/p>\n<p>Eine Analyse der Ausnutzbarkeit der festgestellten Probleme, die die Ausf\u00fchrung von Code durch Angreifer ausl\u00f6sen k\u00f6nnen, wurde nicht durchgef\u00fchrt, jedoch kann nicht ausgeschlossen werden, dass die Sicherheitsanf\u00e4lligkeiten nicht nur einen Kernel-Absturz ausl\u00f6sen k\u00f6nnen. Die Probleme wurden in den Updates FreeBSD 11.3-RELEASE-p8 und 12.1-RELEASE-p4 behoben (in die Stable-Branches wurden die Korrekturen bereits im Dezember letzten Jahres integriert, aber dass diese Korrekturen mit der Schlie\u00dfung der Sicherheitsanf\u00e4lligkeiten zusammenh\u00e4ngen, wurde erst jetzt bekannt).<\/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=52783\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u043f\u0430\u043a\u0435\u0442\u043d\u043e\u043c \u0444\u0438\u043b\u044c\u0442\u0440\u0435 ipfw \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0434\u0432\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 \u043a\u043e\u0434\u0435 \u0440\u0430\u0437\u0431\u043e\u0440\u0430 \u043e\u043f\u0446\u0438\u0439 TCP, \u0432\u044b\u0437\u0432\u0430\u043d\u043d\u044b\u0435 \u043d\u0435\u043a\u043e\u0440\u0440\u0435\u043a\u0442\u043d\u043e\u0439 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u043e\u0439 \u0434\u0430\u043d\u043d\u044b\u0445 \u0432 \u043e\u0431\u0440\u0430\u0431\u0430\u0442\u044b\u0432\u0430\u0435\u043c\u044b\u0445 \u0441\u0435\u0442\u0435\u0432\u044b\u0445 \u043f\u0430\u043a\u0435\u0442\u0430\u0445. \u041f\u0435\u0440\u0432\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2019-5614) \u043f\u0440\u0438 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0435 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u044b\u043c \u043e\u0431\u0440\u0430\u0437\u043e\u043c \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u044b\u0445 TCP-\u043f\u0430\u043a\u0435\u0442\u043e\u0432 \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u0434\u043e\u0441\u0442\u0443\u043f\u0443 \u043a \u043f\u0430\u043c\u044f\u0442\u0438 \u0432\u043d\u0435 \u0432\u044b\u0434\u0435\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0431\u0443\u0444\u0435\u0440\u0430 mbuf, \u0430 \u0432\u0442\u043e\u0440\u0430\u044f (CVE-2019-15874) \u043a \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u044e \u043a \u0443\u0436\u0435 \u043e\u0441\u0432\u043e\u0431\u043e\u0436\u0434\u0451\u043d\u043d\u044b\u043c \u043e\u0431\u043b\u0430\u0441\u0442\u044f\u043c \u043f\u0430\u043c\u044f\u0442\u0438 (use-after-free). \u0410\u043d\u0430\u043b\u0438\u0437 \u043f\u0440\u0438\u0433\u043e\u0434\u043d\u043e\u0441\u0442\u0438 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u043d\u044b\u0445 \u043f\u0440\u043e\u0431\u043b\u0435\u043c \u0434\u043b\u044f [&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-78908","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=\"\u0412 \u043f\u0430\u043a\u0435\u0442\u043d\u043e\u043c \u0444\u0438\u043b\u044c\u0442\u0440\u0435 ipfw \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0434\u0432\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 \u043a\u043e\u0434\u0435 \u0440\u0430\u0437\u0431\u043e\u0440\u0430 \u043e\u043f\u0446\u0438\u0439 TCP, \u0432\u044b\u0437\u0432\u0430\u043d\u043d\u044b\u0435.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta 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\u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0438\u0440\u0443\u0435\u043c\u044b\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 ipfw | ProHoster\" \/>\n\t\t<meta property=\"og:description\" content=\"\u0412 \u043f\u0430\u043a\u0435\u0442\u043d\u043e\u043c \u0444\u0438\u043b\u044c\u0442\u0440\u0435 ipfw \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0434\u0432\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 \u043a\u043e\u0434\u0435 \u0440\u0430\u0437\u0431\u043e\u0440\u0430 \u043e\u043f\u0446\u0438\u0439 TCP, \u0432\u044b\u0437\u0432\u0430\u043d\u043d\u044b\u0435.\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/prohoster.info\/de\/blog\/news\/vo-freebsd-ustraneny-udalyonno-ekspluatiruemye-uyazvimosti-v-ipfw\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:secure_url\" 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