{"id":100782,"date":"2021-07-16T22:22:59","date_gmt":"2021-07-16T20:23:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-ublock-origin-privodyashhaya-k-krahu-ili-ischerpaniyu-resursov"},"modified":"2021-07-16T22:22:59","modified_gmt":"2021-07-16T20:23:00","slug":"uyazvimost-v-ublock-origin-privodyashhaya-k-krahu-ili-ischerpaniyu-resursov","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hr\/blog\/news\/uyazvimost-v-ublock-origin-privodyashhaya-k-krahu-ili-ischerpaniyu-resursov","title":{"rendered":"Ranljivost u uBlock Origin koja dovodi do ru\u0161enja ili iscrpljivanja resursa.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

U sustavu blokiranja ne\u017eeljenog sadr\u017eaja uBlock Origin otkrivena je ranjivost koja mo\u017ee dovesti do ru\u0161enja ili potro\u0161nje memorije prilikom navigacije specifi\u010dno oblikovanim URL-om, u slu\u010daju da taj URL podlije\u017ee pravilima stroge blokade (\u00abstrict blocking\u00bb). Ranjivost se manifestira samo pri direktnom pristupu problemati\u010dnom URL-u, na primjer klikom na poveznicu. <\/p>\n

Ranjivost je ispravljena u a\u017euriranju uBlock Origin 1.36.2. Sli\u010dan problem ima i dodatak uMatrix, ali je njegovo odr\u017eavanje prekinuto i a\u017euriranja vi\u0161e ne\u0107e izlaziti. Obilazne opcije za\u0161tite u uMatrix ne postoje (prvotno je predlo\u017eeno da se isklju\u010de svi filtri stroge blokade putem kartice \u00abAssets\u00bb, no ova preporuka je progla\u0161ena nedovoljnom i problemati\u010dnom za korisnike s vlastitim pravilima blokiranja). U \u00abMatrix\u00bb, fork uMatrix projekta Pale Moon, ranjivost je ispravljena u izdanju 4.4.9. <\/p>\n

Strogi blokiraju\u0107i filtar obi\u010dno se definira na razini domena<\/a> i podrazumijeva zabranu svih veza, \u010dak i prilikom izravnog pristupa poveznici. Ranjivost je uzrokovana time \u0161to kada se korisnik prebaci na stranicu koja podlije\u017ee strogoj blokadi, pojavljuje se upozorenje koje sadr\u017ei informacije o blokiranom resursu, uklju\u010duju\u0107i URL i parametre zahtjeva. Problem je u tome \u0161to uBlock Origin analizuje parametre zahtjeva rekurzivno i dodaje ih u DOM stablo bez obzira na razinu ugnije\u017edenosti. <\/p>\n

Obradom posebno oblikovanog URL-a u uBlock Originu za Chrome mo\u017ee do\u0107i do ru\u0161enja procesa u kojem se izvr\u0161ava pregledni\u010dki dodatak. Nakon ru\u0161enja, dok se proces s dodatkom ne ponovo pokrene, korisnik ostaje bez za\u0161tite od nepo\u017eeljnog sadr\u017eaja. U Firefoxu se promatra iscrpljivanje memorije.

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

\u0412 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u0431\u043b\u043e\u043a\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043d\u0435\u0436\u0435\u043b\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0433\u043e \u043a\u043e\u043d\u0442\u0435\u043d\u0442\u0430 uBlock Origin \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u043a\u0440\u0430\u0445\u0430 \u0438\u043b\u0438 \u0438\u0441\u0447\u0435\u0440\u043f\u0430\u043d\u0438\u044f \u043f\u0430\u043c\u044f\u0442\u0438 \u043f\u0440\u0438 \u043d\u0430\u0432\u0438\u0433\u0430\u0446\u0438\u0438 \u043f\u043e \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u043e\u043c\u0443 URL, \u0432 \u0441\u043b\u0443\u0447\u0430\u0435 \u043f\u043e\u0434\u043f\u0430\u0434\u0430\u043d\u0438\u044f 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