{"id":54354,"date":"2019-12-24T00:00:00","date_gmt":"2019-12-23T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/uyazvimost-v-sqlite-pozvolyayushhaya-udalyonno-atakovat-chrome-cherez-websql"},"modified":"2020-02-18T14:02:21","modified_gmt":"2020-02-18T11:02:21","slug":"uyazvimost-v-sqlite-pozvolyayushhaya-udalyonno-atakovat-chrome-cherez-websql","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/uyazvimost-v-sqlite-pozvolyayushhaya-udalyonno-atakovat-chrome-cherez-websql","title":{"rendered":"Vulnerabilit\u00e0 in SQLite che consente un attacco remoto a Chrome tramite WebSQL","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

I ricercatori della sicurezza della societ\u00e0 cinese Tencent hanno presentato<\/a><\/noindex> una nuova variante della vulnerabilit\u00e0 Magellan<\/a><\/noindex> (CVE-2019-13734<\/a><\/noindex>), che consente di ottenere l'esecuzione di codice tramite la gestione di specifiche costruzioni SQL in un database SQLite. Una vulnerabilit\u00e0 simile era pubblicata<\/a><\/noindex> stata scoperta dagli stessi ricercatori un anno fa. La vulnerabilit\u00e0 \u00e8 significativa perch\u00e9 consente di attaccare da remoto il browser Chrome e ottenere il controllo sul sistema dell'utente quando vengono aperte pagine web controllate dai criminali. <\/p>\n

L'attacco a Chrome\/Chromium avviene tramite l'API WebSQL, il cui gestore si basa sul codice SQLite. L'attacco ad altre applicazioni \u00e8 possibile solo se queste consentono la trasmissione di costruzioni SQL a SQLite provenienti dall'esterno, ad esempio utilizzando SQLite come formato per lo scambio di dati. Firefox non \u00e8 vulnerabile, in quanto la Mozilla ha abbandonato<\/a><\/noindex> ha eliminato l'implementazione di WebSQL a favore di<\/a><\/noindex> API IndexedDB. <\/p>\n

Google ha risolto il problema nella release Chrome 79<\/a><\/noindex>. Nella base di codice SQLite, il problema \u00e8 stato \u00e8 stata corretta<\/a><\/noindex> 17 novembre, e nella base di codice Chromium \u2014 21 novembre<\/a><\/noindex>.
\nIl problema \u00e8 presente nel codice<\/a><\/noindex> motore di ricerca full-text FTS3 e mediante la manipolazione delle tabelle shadow (shadow tables, un particolare tipo di tabelle virtuali con possibilit\u00e0 di scrittura) pu\u00f2 portare a danneggiare l'indice e a un overflow del buffer. Informazioni dettagliate sulla tecnica di sfruttamento saranno pubblicate tra 90 giorni.<\/p>\n

Una nuova release di SQLite con la correzione non \u00e8 ancora stato creato<\/a><\/noindex> (attesa<\/a><\/noindex> 31 dicembre). Come soluzione alternativa di protezione a partire da SQLite 3.26.0, pu\u00f2 essere utilizzata la modalit\u00e0 SQLITE_DBCONFIG_DEFENSIVE, che vieta la scrittura nelle tabelle shadow e si consiglia di attivarla quando si gestiscono SQL esterni in SQLite. Nelle distribuzioni, la vulnerabilit\u00e0 nella libreria SQLite rimane non corretta in Debian<\/a><\/noindex>, Ubuntu<\/a><\/noindex>, RHEL<\/a><\/noindex>, openSUSE\/SUSE<\/a><\/noindex>, Arch Linux<\/a><\/noindex>, Fedora<\/a><\/noindex>, FreeBSD<\/a><\/noindex>. Chromium in tutte le distribuzioni \u00e8 gi\u00e0 stato aggiornato e non \u00e8 vulnerabile, ma il problema pu\u00f2 riguardare vari browser di terze parti e applicazioni che utilizzano il motore Chromium, oltre alle applicazioni Android basate su Webview.<\/p>\n

In aggiunta, in SQLite sono state anche identificate 4 problematiche meno gravi (CVE-2019-13750<\/a><\/noindex>, CVE-2019-13751<\/a><\/noindex>, CVE-2019-13752<\/a><\/noindex>, CVE-2019-13753<\/a><\/noindex>), che possono portare a perdita di informazioni e ad un aggiramento delle restrizioni (possono essere utilizzate come fattori ausiliari per attaccare Chrome). I problemi indicati sono stati risolti nella base di codice SQLite il 13 dicembre. Complessivamente, i problemi hanno consentito ai ricercatori di preparare un exploit funzionante, che consente di eseguire codice nel contesto del processo Chromium responsabile del rendering.<\/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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