{"id":36382,"date":"2019-10-31T22:11:21","date_gmt":"2019-10-31T19:11:21","guid":{"rendered":"https:\/\/prohoster.info\/blog\/uyazvimost-pozvolyayushhaya-dopolneniyam-chrome-vypolnyat-vneshnij-kod-nesmotrya-na-prava-dostupa\/"},"modified":"2019-10-31T22:11:21","modified_gmt":"2019-10-31T19:11:21","slug":"uyazvimost-pozvolyayushhaya-dopolneniyam-chrome-vypolnyat-vneshnij-kod-nesmotrya-na-prava-dostupa","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/uyazvimost-pozvolyayushhaya-dopolneniyam-chrome-vypolnyat-vneshnij-kod-nesmotrya-na-prava-dostupa","title":{"rendered":"Vulnerabilit\u00e0 che consente alle estensioni Chrome di eseguire codice esterno, nonostante i diritti di accesso","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Pubblicato<\/a><\/noindex> Un metodo che permette di eseguire codice JavaScript esterno in qualsiasi estensione per Chrome senza fornire all'estensione privilegi elevati (senza unsafe-eval e unsafe-inline in manifest.json). I permessi implicano che senza unsafe-eval l'estensione possa eseguire solo il codice incluso nella fornitura locale, ma il metodo proposto consente di aggirare questa limitazione ed eseguire nel contesto dell'estensione qualsiasi JavaScript caricato da un sito esterno.<\/p>\n

Attualmente, Google ha chiuso l'accesso pubblico a rapporti su problemi<\/a><\/noindex>, ma nell'archivio \u00e8 rimasto<\/a><\/noindex> un esempio di codice per sfruttare il problema. Il metodo \u00e8 simile<\/a><\/noindex> il metodo per aggirare il limite script-src ‘self’ nel CSP consiste nell'inserire il tag script tramite document.createElement(‘script’) e includere al suo interno contenuti esterni attraverso la funzione fetch, dopodich\u00e9 il codice verr\u00e0 eseguito nel contesto stesso dell'estensione.<\/p>\n

<\/a><\/noindex><\/p>\n

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

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