{"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\/it\/blog\/news\/uyazvimost-v-ublock-origin-privodyashhaya-k-krahu-ili-ischerpaniyu-resursov","title":{"rendered":"Vulnerabilit\u00e0 in uBlock Origin, che porta a crash o esaurimento delle risorse","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Nel sistema di blocco dei contenuti indesiderati uBlock Origin \u00e8 stata identificata una vulnerabilit\u00e0 che consente di causare un crash o un esaurimento della memoria durante la navigazione di un URL appositamente formattato, se questo URL rientra nei filtri di blocco rigoroso (\u00abstrict blocking\u00bb). La vulnerabilit\u00e0 si manifesta solo effettuando un accesso diretto all'URL problematico, ad esempio cliccando su un link. <\/p>\n

La vulnerabilit\u00e0 \u00e8 stata corretta nell'aggiornamento uBlock Origin 1.36.2. Un problema simile interessa anche l'estensione uMatrix, ma il suo supporto \u00e8 stato interrotto e non vengono pi\u00f9 rilasciati aggiornamenti. Non ci sono soluzioni di bypass per uMatrix (inizialmente si consigliava di disattivare tutti i filtri di blocco rigoroso nella scheda \u00abAssets\u00bb, ma questa raccomandazione \u00e8 stata riconosciuta come insufficiente e problematica per gli utenti con regole di blocco personalizzate). In uMatrix, un fork di uMatrix dal progetto Pale Moon, la vulnerabilit\u00e0 \u00e8 stata risolta nella versione 4.4.9. <\/p>\n

Il filtro di blocco rigoroso viene solitamente definito a livello dei domini<\/a> e implica il divieto di qualsiasi connessione, anche durante l'accesso diretto a un link. La vulnerabilit\u00e0 \u00e8 causata dal fatto che durante l'accesso a una pagina soggetta al filtro di blocco rigoroso, all'utente viene mostrato un avviso con informazioni sulla risorsa bloccata, compresi l'URL e i parametri di richiesta. Il problema \u00e8 che uBlock Origin analizza i parametri di richiesta in modo ricorsivo e li aggiunge all'albero DOM senza tener conto del livello di nidificazione. <\/p>\n

Durante l'elaborazione di un URL appositamente formattato in uBlock Origin per Chrome, \u00e8 possibile causare un crash del processo in cui \u00e8 in esecuzione l'estensione del browser. Dopo il crash, finch\u00e9 il processo con l'estensione non viene riavviato, l'utente rimane senza protezione dai contenuti indesiderati. In Firefox si verifica un esaurimento della memoria.

\"Vulnerabilit\u00e0<\/center>
\n
Fonte: 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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