{"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\/ro\/blog\/news\/uyazvimost-v-ublock-origin-privodyashhaya-k-krahu-ili-ischerpaniyu-resursov","title":{"rendered":"O vulnerabilitate \u00een uBlock Origin care duce la pr\u0103bu\u0219iri sau consum de resurse","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

\u00cen sistemul de blocare a con\u021binutului nedorit uBlock Origin a fost identificat\u0103 o vulnerabilitate care permite crash-ul sau epuizarea memoriei \u00een timpul navig\u0103rii pe un URL special format, \u00een cazul \u00een care acest URL se \u00eencadreaz\u0103 sub filtrele de blocare strict\u0103 («strict blocking»). Vulnerabilitatea se manifest\u0103 doar la accesarea direct\u0103 a URL-ului problematic, de exemplu, prin clic pe un link. <\/p>\n

Vulnerabilitatea a fost remediat\u0103 \u00een actualizarea uBlock Origin 1.36.2. O problem\u0103 similar\u0103 afecteaz\u0103 \u0219i extensia uMatrix, dar suportul pentru aceasta a fost oprit \u0219i nu mai sunt lansate actualiz\u0103ri. Solu\u021biile de protec\u021bie \u00een uMatrix lipsesc (ini\u021bial s-a propus dezactivarea tuturor filtrelor de blocare strict\u0103 prin tab-ul «Assets», dar aceast\u0103 recomandare a fost considerat\u0103 insuficient\u0103 \u0219i problematic\u0103 pentru utilizatorii cu reguli proprii de blocare). \u00cen ηMatrix, un fork al uMatrix din proiectul Pale Moon, vulnerabilitatea a fost remediat\u0103 \u00een versiunea 4.4.9. <\/p>\n

Filtrul de blocare strict\u0103 este, de obicei, definit la nivelul domenii<\/a> \u0219i presupune interzicerea oric\u0103ror conexiuni, chiar \u0219i la accesarea direct\u0103 a unui link. Vulnerabilitatea este cauzat\u0103 de faptul c\u0103, \u00een timpul acces\u0103rii unei pagini care se \u00eencadreaz\u0103 sub filtrul de blocare strict\u0103, utilizatorului i se afi\u0219eaz\u0103 un avertisment care con\u021bine informa\u021bii despre resursa blocat\u0103, inclusiv URL-ul \u0219i parametrii cererii. Problema este c\u0103 uBlock Origin analizeaz\u0103 parametrii cererii recursiv \u0219i \u00eei adaug\u0103 \u00een arborele DOM, f\u0103r\u0103 a lua \u00een considerare nivelul de imbedere. <\/p>\n

Prin procesarea unui URL special conceput \u00een uBlock Origin pentru Chrome, se poate provoca pr\u0103bu\u0219irea procesului \u00een care se execut\u0103 extensia browserului. Dup\u0103 pr\u0103bu\u0219ire, p\u00e2n\u0103 c\u00e2nd procesul cu extensia nu se reporne\u0219te, utilizatorul r\u0103m\u00e2ne f\u0103r\u0103 blocarea con\u021binutului nedorit. \u00cen Firefox se observ\u0103 epuizarea memoriei.

\"O<\/center>
\n
Sursa: opennet.ro<\/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. \u0410\u043d\u0430\u043b\u043e\u0433\u0438\u0447\u043d\u043e\u0439 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0435 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":100783,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-100782","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\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\n","aioseo_head_json":{"title":"\ud83e\udd47O vulnerabilitate \u00een uBlock Origin care duce la pr\u0103bu\u0219iri sau consum de resurse | ProHoster","description":"\u00cen sistemul de blocare a con\u021binutului nedorit uBlock Origin a fost identificat\u0103 o vulnerabilitate care permite provocarea pr\u0103bu\u0219irii sau 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