{"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\/fr\/blog\/news\/uyazvimost-v-sqlite-pozvolyayushhaya-udalyonno-atakovat-chrome-cherez-websql","title":{"rendered":"Vuln\u00e9rabilit\u00e9 dans SQLite permettant une attaque \u00e0 distance de Chrome via WebSQL","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Les chercheurs en s\u00e9curit\u00e9 de l'entreprise chinoise Tencent a \u00e9t\u00e9 pr\u00e9sent\u00e9e<\/a><\/noindex> une nouvelle variante de vuln\u00e9rabilit\u00e9 Magellan<\/a><\/noindex> (CVE-2019-13734<\/a><\/noindex>), permettant l'ex\u00e9cution de code lors du traitement dans le SGBD SQLite de constructions SQL sp\u00e9cifiquement format\u00e9es. Une vuln\u00e9rabilit\u00e9 similaire avait \u00e9t\u00e9 a \u00e9t\u00e9 publi\u00e9e<\/a><\/noindex> d\u00e9tect\u00e9e par les m\u00eames chercheurs il y a un an. Cette vuln\u00e9rabilit\u00e9 est remarquable car elle permet d'attaquer \u00e0 distance le navigateur Chrome et d'obtenir un contr\u00f4le sur le syst\u00e8me de l'utilisateur en ouvrant des pages web contr\u00f4l\u00e9es par l'attaquant. <\/p>\n

L'attaque sur Chrome\/Chromium se fait via l'API WebSQL, dont le gestionnaire est bas\u00e9 sur le code SQLite. L'attaque sur d'autres applications n'est possible que si elles permettent de transmettre des constructions SQL externes \u00e0 SQLite, par exemple, utilisent SQLite comme format pour l'\u00e9change de donn\u00e9es. Firefox n'est pas vuln\u00e9rable, car Mozilla a renonc\u00e9<\/a><\/noindex> \u00e0 mettre en \u0153uvre WebSQL au profit de<\/a><\/noindex> l'API IndexedDB. <\/p>\n

Google a corrig\u00e9 le probl\u00e8me dans la version Chrome 79<\/a><\/noindex>. Dans la base de code SQLite, le probl\u00e8me a \u00e9t\u00e9 corrig\u00e9<\/a><\/noindex> 17 novembre, et dans la base de code de Chromium \u2014 21 novembre<\/a><\/noindex>.
\nLe probl\u00e8me est pr\u00e9sent dans le code<\/a><\/noindex> le moteur de recherche plein texte FTS3 et par manipulation des tables d'ombre (shadow tables, un type particulier de tables virtuelles avec possibilit\u00e9 d'\u00e9criture), il peut provoquer des dommages \u00e0 l'index et un d\u00e9bordement de tampon. Des informations d\u00e9taill\u00e9es sur la technique d'exploitation seront publi\u00e9es dans 90 jours.<\/p>\n

Le nouveau release de SQLite avec correction n'est pas encore form\u00e9<\/a><\/noindex> (est attendue<\/a><\/noindex> 31 d\u00e9cembre). Comme solution de contournement \u00e0 partir de SQLite 3.26.0, le mode SQLITE_DBCONFIG_DEFENSIVE peut \u00eatre utilis\u00e9, ce qui interdit l'\u00e9criture dans les tables d'ombre et est recommand\u00e9 pour \u00eatre activ\u00e9 lors du traitement de requ\u00eates SQL externes dans SQLite. Dans les distributions, la vuln\u00e9rabilit\u00e9 dans la biblioth\u00e8que SQLite reste non corrig\u00e9e dans Debian<\/a><\/noindex>, Ubuntu<\/a><\/noindex>, RHEL<\/a><\/noindex>, openSUSE\/SUSE<\/a><\/noindex>, Arch Linux<\/a><\/noindex>, Fedora<\/a><\/noindex>, FreeBSD<\/a><\/noindex>. Chromium a d\u00e9j\u00e0 \u00e9t\u00e9 mis \u00e0 jour dans toutes les distributions et n'est pas vuln\u00e9rable, mais le probl\u00e8me peut concerner divers navigateurs tiers et applications utilisant le moteur Chromium, ainsi que les applications Android bas\u00e9es sur Webview.<\/p>\n

De plus, 4 probl\u00e8mes moins dangereux ont \u00e9galement \u00e9t\u00e9 identifi\u00e9s dans SQLite (CVE-2019-13750<\/a><\/noindex>, CVE-2019-13751<\/a><\/noindex>, CVE-2019-13752<\/a><\/noindex>, CVE-2019-13753<\/a><\/noindex>), qui peuvent entra\u00eener des fuites d'informations et contourner des restrictions (pouvant \u00eatre utilis\u00e9s comme facteurs accessoires pour une attaque contre Chrome). Les probl\u00e8mes signal\u00e9s ont \u00e9t\u00e9 corrig\u00e9s dans le code SQLite le 13 d\u00e9cembre. Ensemble, ces probl\u00e8mes ont permis aux chercheurs de pr\u00e9parer un exploit fonctionnel permettant d'ex\u00e9cuter du code dans le contexte du processus Chromium responsable du rendu.<\/p>\n

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

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

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