{"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\/ro\/blog\/news\/uyazvimost-v-web-brauzerah-pozvolyayushhaya-atakovat-lokalnye-servisy-cherez-ip-0-0-0-0","title":{"rendered":"O vulnerabilitate \u00een browserele web, care permite atacarea serviciilor locale prin IP 0.0.0.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Compania Oligo Security a publicat informa\u021bii despre o vulnerabilitate care afecteaz\u0103 Chrome, Firefox \u0219i Safari, permi\u021b\u00e2nd ocolirea restric\u021biilor de acces la serviciile de re\u021bea disponibile doar pe sistemul local, prin apelarea adresei IP 0.0.0.0. Primele avertiz\u0103ri despre vulnerabilitate au fost publicate acum 18 ani, dar problema nu a fost \u00eenc\u0103 rezolvat\u0103. <\/p>\n

Vulnerabilitatea care se manifest\u0103 doar pe Linux \u0219i macOS este cauzat\u0103 de faptul c\u0103 adresa IP 0.0.0.0 pe aceste platforme duce la apelarea interfe\u021bei re\u021belei locale (localhost), adic\u0103 trimiterea unei cereri c\u0103tre 0.0.0.0 este echivalent\u0103 cu o cerere c\u0103tre adresa 127.0.0.1. Browserele moderne dispun de m\u0103suri pentru a contracara apelurile c\u0103tre 127.0.0.1 atunci c\u00e2nd se lucreaz\u0103 cu site-uri externe, deoarece acestea pot fi folosite pentru manipularea serviciilor interne pe sistemul utilizatorului, accesibile doar aplica\u021biilor locale. <\/p>\n

Vulnerabilitatea permite ocolirea interdic\u021biei de apelare la 127.0.0.1 \u0219i organizarea unui atac asupra serviciilor interne atunci c\u00e2nd se deschide \u00een browser o pagin\u0103 extern\u0103 controlat\u0103 de atacator. Prin apelarea prin 0.0.0.0, mecanismele CORS (Cross-Origin Resource Sharing) \u0219i PNA (Private Network Access) nu pot \u00eempiedica un astfel de atac. Se observ\u0103 c\u0103 problema nu este at\u00e2t de benign\u0103 pe c\u00e2t pare \u0219i este deja utilizat\u0103 de c\u0103tre infractorii informatici \u00een desf\u0103\u0219urarea atacurilor reale, care exploateaz\u0103 vulnerabilit\u0103\u021bi critice \u00een aplica\u021biile server, la care accesul este deschis doar pentru sistemul local.

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

De exemplu, utilizarea 0.0.0.0 pentru accesarea serviciilor locale a fost documentat\u0103 \u00een atacurile ShadowRay \u0219i Selenium Grid, identificate \u00een martie \u0219i iulie, care au fost folosite pentru a organiza execu\u021bia de cod pe sistemele dezvoltatorilor. \u00cen cazul atacului ShadowRay, \u021binta au fost sistemele dezvoltatorilor care utilizeaz\u0103 framework-ul AI Ray. Al doilea atac a vizat exploatarea unei vulnerabilit\u0103\u021bi critice \u00een platforma Selenium Grid \u00een configura\u021biile care accept\u0103 cereri doar de la gazda local\u0103. <\/p>\n

\u00cen plus, se men\u021bioneaz\u0103 posibilitatea de a aplica metoda pentru a exploata vulnerabilitatea ShellTorch \u00een server<\/a> PyTorch TorchServe, utilizat pe computerele dezvoltatorilor de aplica\u021bii AI. Accesul la serviciile de re\u021bea ale gazdei locale poate fi, de asemenea, utilizat pentru scanarea porturilor de re\u021bea \u00een scopul identific\u0103rii indirecte a utilizatorului. <\/p>\n

Dezvoltatorii Firefox au preg\u0103tit o modificare a specifica\u021biei pentru apelul Fetch, interzic\u00e2nd accesul la 0.0.0.0, dar deocamdat\u0103 nu au stabilit data \u00eenceperii bloc\u0103rii \u00een browser. \u00cen Chrome, accesul la 0.0.0.0 va fi blocat \u00een versiunea Chrome 128, a\u0219teptat\u0103 s\u0103pt\u0103m\u00e2na viitoare. \u00cen Safari, blocarea 0.0.0.0 este planificat\u0103 pentru versiunea Safari 18.
\n
Sursa: opennet.ro<\/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 IP-\u0430\u0434\u0440\u0435\u0441\u0443 0.0.0.0. \u041f\u0435\u0440\u0432\u044b\u0435 \u043f\u0440\u0435\u0434\u0443\u043f\u0440\u0435\u0436\u0434\u0435\u043d\u0438\u044f \u043e\u0431 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0431\u044b\u043b\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b \u0435\u0449\u0451 18 \u043b\u0435\u0442 \u043d\u0430\u0437\u0430\u0434, \u043d\u043e \u0434\u043e \u0441\u0438\u0445 \u043f\u043e\u0440 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0442\u0430\u043a \u0438 \u043d\u0435 \u0431\u044b\u043b\u0430 \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0430. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0442\u043e\u043b\u044c\u043a\u043e \u0432 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