{"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\/da\/blog\/news\/uyazvimost-v-ublock-origin-privodyashhaya-k-krahu-ili-ischerpaniyu-resursov","title":{"rendered":"S\u00e5rbarhed i uBlock Origin, der f\u00f8rer til nedbrud eller ressourceudt\u00f8mning","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

I systemet til blokering af u\u00f8nsket indhold uBlock Origin er der blevet identificeret en s\u00e5rbarhed, der kan f\u00f8re til nedbrud eller hukommelsesudt\u00f8mning ved navigation p\u00e5 en specielt udformet URL, hvis denne URL falder ind under strenge blokeringsfiltre (\"strict blocking\"). S\u00e5rbarheden opst\u00e5r kun ved direkte adgang til den problematiske URL, f.eks. ved at klikke p\u00e5 et link. <\/p>\n

S\u00e5rbarheden er blevet rettet i opdateringen uBlock Origin 1.36.2. Et lignende problem p\u00e5virker ogs\u00e5 udvidelsen uMatrix, men vedligeholdelsen af denne er blevet stoppet, og der udgives ikke flere opdateringer. Der er ikke nogen beskyttelsesarbejdsmetoder i uMatrix (det blev oprindeligt foresl\u00e5et at deaktivere alle strenge blokeringsfiltre via fanen \"Assets\", men denne anbefaling blev anerkendt som utilstr\u00e6kkelig og problematisk for brugere med egne blokkeringsregler). I uMatrix, en fork af uMatrix fra projektet Pale Moon, er s\u00e5rbarheden blevet rettet i version 4.4.9. <\/p>\n

Filtrering for stram blokering defineres normalt p\u00e5 niveau dom\u00e6ner<\/a> og indeb\u00e6rer forbud mod enhver forbindelse, selv ved direkte overgang via et link. S\u00e5rbarheden skyldes, at n\u00e5r brugeren navigerer til en side, der falder ind under filteret for stram blokering, vises der en advarsel, hvor oplysninger om den blokerede ressource gives, herunder URL og foresp\u00f8rgselsparametre. Problemet er, at uBlock Origin analyserer foresp\u00f8rgselsparametre rekursivt og tilf\u00f8jer dem til DOM-tr\u00e6et uden hensyntagen til fork\u00e6mmelsesniveauet. <\/p>\n

Ved behandling af et specialformateret URL i uBlock Origin for Chrome kan processen, der k\u00f8rer browserudvidelsen, nedbrydes. Efter nedbruddet, indtil processen med udvidelsen genstartes, forbliver brugeren uden blokering af u\u00f8nsket indhold. I Firefox observeres hukommelsest\u00f8mning.

\"S\u00e5rbarhed<\/center>
\n
Kilde: 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 \u0434\u0430\u043d\u043d\u043e\u0433\u043e URL \u043f\u043e\u0434 \u0444\u0438\u043b\u044c\u0442\u0440\u044b \u0441\u0442\u0440\u043e\u0433\u043e\u0439 \u0431\u043b\u043e\u043a\u0438\u0440\u043e\u0432\u043a\u0438 («strict blocking»). \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0442\u043e\u043b\u044c\u043a\u043e \u043f\u0440\u0438 \u043f\u0440\u044f\u043c\u043e\u043c \u043f\u0435\u0440\u0435\u0445\u043e\u0434\u0435 \u043d\u0430 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u043d\u044b\u0439 URL, \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440 \u043f\u0440\u0438 \u043a\u043b\u0438\u043a\u0435 \u043f\u043e \u0441\u0441\u044b\u043b\u043a\u0435. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0432 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0438 uBlock Origin 1.36.2. 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