{"id":94683,"date":"2020-09-20T01:42:01","date_gmt":"2020-09-19T23:42:01","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-firefox-dlya-android-pozvolyayushhaya-upravlyat-brauzerom-cherez-obshhij-wi-fi"},"modified":"2020-09-20T01:42:01","modified_gmt":"2020-09-19T23:42:01","slug":"uyazvimost-v-firefox-dlya-android-pozvolyayushhaya-upravlyat-brauzerom-cherez-obshhij-wi-fi","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/uyazvimost-v-firefox-dlya-android-pozvolyayushhaya-upravlyat-brauzerom-cherez-obshhij-wi-fi","title":{"rendered":"S\u00e5rbarhed i Firefox til Android, der giver mulighed for at styre browseren via et delt Wi-Fi","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

I Firefox til Android opdaget<\/a><\/noindex> alvorlig ASLR i programmer med setuid-flaget og bestemme adressefordelingen i de indl\u00e6ste biblioteker gennem manipulation af milj\u00f8variablen LD_PREFER_MAP_32BIT_EXEC.<\/a><\/noindex> i implementeringen af protokollen SSDP<\/a><\/noindex>, der bruges til at opdage netv\u00e6rksservices i det lokale netv\u00e6rk. S\u00e5rbarheden g\u00f8r det muligt for en angriber, der befinder sig i samme lokale eller tr\u00e5dl\u00f8se netv\u00e6rk, at svare p\u00e5 Firefox' kontrolforesp\u00f8rgsler med en UPnP XML «LOCATION» med intent-kommandoer<\/a><\/noindex>, ved hj\u00e6lp af hvilke man kan \u00e5bne en vilk\u00e5rlig URI i browseren eller kalde h\u00e5ndterere fra andre apps. <\/p>\n

Problemet viser sig helt frem til versionen Firefox til Android 68.11.0<\/a><\/noindex> og er l\u00f8st i versionen af Firefox til Android 79, dvs. \u00e6ldre klassiske versioner af Firefox til Android er s\u00e5rbare, og for at blokere problemet kr\u00e6ves der et skift til den nye udgave<\/a><\/noindex> af browseren (Fenix), som bruger GeckoView-motoren, baseret p\u00e5 teknologierne fra Firefox Quantum, og et s\u00e6t biblioteker Mozilla Android Components<\/a><\/noindex>. Problemet ber\u00f8rer ikke versioner af Firefox til station\u00e6re systemer.<\/p>\n

For at teste s\u00e5rbarheden er forberedt<\/a><\/noindex> en fungerende prototype af exploiten. Angrebet udf\u00f8res uden nogen handling fra brugerens side; det er tilstr\u00e6kkeligt, at den s\u00e5rbare Firefox-browser til Android k\u00f8rer p\u00e5 den mobile enhed, og at offeret befinder sig i samme subnet som angriberens SSDP-server. <\/p>\n

Firefox til Android sender periodisk SSDP-meddelser i multicast mode (multicast UDP) for at identificere enheder, der udsender i det lokale netv\u00e6rk, s\u00e5som medieafspillere og smarte tv. Alle enheder i det lokale netv\u00e6rk modtager de meddelelser og har mulighed for at sende et svar tilbage. I normal drift returnerer enheden et link til placeringen af en XML-fil med information om enheden, der underst\u00f8tter UPnP. Under angrebet kan der i stedet for et link til XML sendes en URI med intent-kommandoer til Android. <\/p>\n

Med intent-kommandoer kan man omdirigere brugeren til phishing-websteder eller give et link til en xpi-fil (browseren vil vise et forslag om at installere et till\u00e6g). Da angriberens svar ikke er begr\u00e6nsede, kan han fors\u00f8ge at overmande brugeren og oversv\u00f8mme browseren med tilbud om installation eller skadelige websteder i h\u00e5bet om, at brugeren fejlagtigt klikker p\u00e5 installationen af en skadelig pakke. Udover at \u00e5bne vilk\u00e5rlige links i selve browseren kan intent-kommandoer ogs\u00e5 bruges til at h\u00e5ndtere indhold i andre Android-apps; for eksempel kan man \u00e5bne en e-mail-skabelon i en e-mail-klient (URI mailto:) eller starte et interface til at foretage et opkald (URI tel:).<\/p>\n


\n

<\/a><\/noindex><\/p>\n

Kilde: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 Firefox \u0434\u043b\u044f Android \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0441\u0435\u0440\u044c\u0451\u0437\u043d\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 SSDP, \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u043e\u0433\u043e \u0434\u043b\u044f \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u0438\u044f \u0441\u0435\u0442\u0435\u0432\u044b\u0445 \u0441\u0435\u0440\u0432\u0438\u0441\u043e\u0432 \u0432 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u0439 \u0441\u0435\u0442\u0438. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0435\u043c\u0443, \u043d\u0430\u0445\u043e\u0434\u044f\u0449\u0435\u043c\u0443\u0441\u044f \u0432 \u0442\u043e\u0439 \u0436\u0435 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u0439 \u0438\u043b\u0438 \u0431\u0435\u0441\u043f\u0440\u043e\u0432\u043e\u0434\u043d\u043e\u0439 \u0441\u0435\u0442\u0438, \u043e\u0442\u0432\u0435\u0442\u0438\u0442\u044c \u043d\u0430 \u043f\u0440\u043e\u0432\u0435\u0440\u043e\u0447\u043d\u044b\u0435 \u0437\u0430\u043f\u0440\u043e\u0441\u044b Firefox \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u0435\u043c UPnP XML «LOCATION» \u0441 intent-\u043a\u043e\u043c\u0430\u043d\u0434\u0430\u043c\u0438, \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043c\u043e\u0436\u043d\u043e \u043e\u0442\u043a\u0440\u044b\u0442\u044c \u0432 \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0435 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0439 URI \u0438\u043b\u0438 \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 \u0434\u0440\u0443\u0433\u0438\u0445 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439. […]<\/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-94683","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47S\u00e5rbarhed i Firefox til Android, der muligg\u00f8r styring af browseren via et offentlig Wi-Fi | ProHoster","description":"Der er opdaget en 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