{"id":119440,"date":"2024-08-13T15:43:13","date_gmt":"2024-08-13T13:43:15","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-web-brauzerah-pozvolyayushhaya-atakovat-lokalnye-servisy-cherez-ip-0-0-0-0"},"modified":"2024-08-13T15:43:13","modified_gmt":"2024-08-13T13:43:15","slug":"uyazvimost-v-web-brauzerah-pozvolyayushhaya-atakovat-lokalnye-servisy-cherez-ip-0-0-0-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/uyazvimost-v-web-brauzerah-pozvolyayushhaya-atakovat-lokalnye-servisy-cherez-ip-0-0-0-0","title":{"rendered":"Vulnerability in web browsers allowing attacks on local services via IP 0.0.0.0.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Spole\u010dnost Oligo Security zve\u0159ejnila informace o zranitelnosti, kter\u00e1 se t\u00fdk\u00e1 prohl\u00ed\u017ee\u010d\u016f Chrome, Firefox a Safari, a umo\u017e\u0148uje obej\u00edt omezen\u00ed p\u0159\u00edstupu k s\u00ed\u0165ov\u00fdm slu\u017eb\u00e1m, kter\u00e9 jsou dostupn\u00e9 pouze na lok\u00e1ln\u00edm syst\u00e9mu, prost\u0159ednictv\u00edm p\u0159\u00edstupu na IP adresu 0.0.0.0. Prvn\u00ed varov\u00e1n\u00ed o zranitelnosti byla zve\u0159ejn\u011bna ji\u017e p\u0159ed 18 lety, ale probl\u00e9m dosud nebyl opraven. <\/p>\n

Zranitelnost, kter\u00e1 se projevuje pouze v Linuxu a macOS, je zp\u016fsobena t\u00edm, \u017ee IP adresa 0.0.0.0 na t\u011bchto platform\u00e1ch vede k p\u0159\u00edstupu k m\u00edstn\u00ed s\u00ed\u0165ov\u00e9 rozhran\u00ed (localhost), tj. odesl\u00e1n\u00ed \u017e\u00e1dosti na 0.0.0.0 je stejn\u00e9 jako \u017e\u00e1dost o adresu 127.0.0.1. V modern\u00edch prohl\u00ed\u017ee\u010d\u00edch jsou n\u00e1stroje na ochranu proti p\u0159\u00edstupu k 127.0.0.1 p\u0159i pr\u00e1ci s extern\u00edmi webov\u00fdmi str\u00e1nkami, jeliko\u017e m\u016f\u017ee b\u00fdt vyu\u017eito k manipulaci s intern\u00edmi slu\u017ebami v syst\u00e9mu u\u017eivatele, kter\u00e9 jsou dostupn\u00e9 pouze lok\u00e1ln\u00edm aplikac\u00edm. <\/p>\n

Zranitelnost umo\u017e\u0148uje obej\u00edt z\u00e1kaz p\u0159\u00edstupu k 127.0.0.1 a uspo\u0159\u00e1dat \u00fatok na intern\u00ed slu\u017eby p\u0159i otev\u0159en\u00ed extern\u00ed str\u00e1nky v prohl\u00ed\u017ee\u010di, kter\u00e1 je pod kontrolou \u00fato\u010dn\u00edka. P\u0159i p\u0159\u00edstupu p\u0159es 0.0.0.0 mechanismy CORS (Cross-Origin Resource Sharing) a PNA (Private Network Access) nemohou zabr\u00e1nit takov\u00e9mu \u00fatoku. Je uvedeno, \u017ee probl\u00e9m nen\u00ed tak nevinn\u00fd, jak se zd\u00e1, a ji\u017e byl vyu\u017eit \u00fato\u010dn\u00edky b\u011bhem skute\u010dn\u00fdch \u00fatok\u016f, kter\u00e9 vyu\u017e\u00edvaj\u00ed kritick\u00e9 zranitelnosti v serverov\u00fdch aplikac\u00edch, jejich\u017e p\u0159\u00edstup je otev\u0159en pouze pro m\u00edstn\u00ed syst\u00e9m.

\"Vulnerability\"Vulnerability<\/center> <\/p>\n

Nap\u0159\u00edklad pou\u017eit\u00ed 0.0.0.0 pro p\u0159\u00edstup k m\u00edstn\u00edm slu\u017eb\u00e1m bylo zaznamen\u00e1no b\u011bhem \u00fatok\u016f ShadowRay a Selenium Grid identifikovan\u00fdch v b\u0159eznu a \u010dervenci, kter\u00e9 byly pou\u017eity k prov\u00e1d\u011bn\u00ed k\u00f3du na syst\u00e9mech v\u00fdvoj\u00e1\u0159\u016f. V p\u0159\u00edpad\u011b \u00fatoku ShadowRay byly c\u00edlem syst\u00e9my v\u00fdvoj\u00e1\u0159\u016f, kter\u00e9 pou\u017e\u00edvaly AI framework Ray. Druh\u00fd \u00fatok m\u011bl za c\u00edl vyu\u017eit\u00ed kritick\u00e9 zranitelnosti v platform\u011b Selenium Grid v konfigurac\u00edch, kter\u00e9 p\u0159ij\u00edmaj\u00ed \u017e\u00e1dosti pouze z m\u00edstn\u00edho hostitele. <\/p>\n

D\u00e1le se zmi\u0148uje mo\u017enost vyu\u017eit\u00ed metody k exploitaci zranitelnosti ShellTorch v serveru<\/a> PyTorch TorchServe, pou\u017e\u00edvan\u00e9m na po\u010d\u00edta\u010d\u00edch v\u00fdvoj\u00e1\u0159\u016f AI aplikac\u00ed. P\u0159\u00edstup k s\u00ed\u0165ov\u00fdm slu\u017eb\u00e1m m\u00edstn\u00edho hostitele m\u016f\u017ee b\u00fdt tak\u00e9 vyu\u017eit pro skenov\u00e1n\u00ed s\u00ed\u0165ov\u00fdch port\u016f s c\u00edlem nep\u0159\u00edm\u00e9ho identifikace u\u017eivatele. <\/p>\n

V\u00fdvoj\u00e1\u0159i Firefoxu p\u0159ipravili zm\u011bnu specifikace pro vol\u00e1n\u00ed Fetch, kter\u00e1 zakazuje p\u0159\u00edstup na 0.0.0.0, ale zat\u00edm neur\u010dili \u010das, kdy za\u010dne blokov\u00e1n\u00ed v prohl\u00ed\u017ee\u010di. V Chrome pl\u00e1nuj\u00ed za\u010d\u00edt blokovat p\u0159\u00edstup na 0.0.0.0 od verze Chrome 128, kter\u00e1 by m\u011bla vyj\u00edt p\u0159\u00ed\u0161t\u00ed t\u00fdden. V Safari pl\u00e1nuj\u00ed realizaci blokov\u00e1n\u00ed 0.0.0.0 ve verzi Safari 18.
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Oligo Security \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b\u0430 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044e \u043e\u0431 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438, \u0437\u0430\u0442\u0440\u0430\u0433\u0438\u0432\u0430\u044e\u0449\u0435\u0439 Chrome, Firefox \u0438 Safari, \u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0439 \u043e\u0431\u043e\u0439\u0442\u0438 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u0435 \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043a \u0441\u0435\u0442\u0435\u0432\u044b\u043c \u0441\u043b\u0443\u0436\u0431\u0430\u043c, \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u044b\u043c \u0442\u043e\u043b\u044c\u043a\u043e \u043d\u0430 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u0435, \u0447\u0435\u0440\u0435\u0437 \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u0435 \u043f\u043e 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