{"id":84776,"date":"2020-06-11T01:41:55","date_gmt":"2020-06-10T23:41:55","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-vo-freebsd-ekspluatiruemaya-cherez-vredonosnoe-usb-ustrojstvo"},"modified":"2020-06-11T01:41:55","modified_gmt":"2020-06-10T23:41:55","slug":"uyazvimost-vo-freebsd-ekspluatiruemaya-cherez-vredonosnoe-usb-ustrojstvo","status":"publish","type":"post","link":"https:\/\/prohoster.info\/fr\/blog\/news\/uyazvimost-vo-freebsd-ekspluatiruemaya-cherez-vredonosnoe-usb-ustrojstvo","title":{"rendered":"Vuln\u00e9rabilit\u00e9 dans FreeBSD exploit\u00e9e via un p\u00e9riph\u00e9rique USB malveillant","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Dans FreeBSD a \u00e9t\u00e9 corrig\u00e9e<\/a><\/noindex> Une vuln\u00e9rabilit\u00e9 dans la pile USB (CVE-2020-7456) permet l'ex\u00e9cution de code au niveau du noyau ou dans l'espace utilisateur lors de la connexion d'un appareil USB malveillant au syst\u00e8me. Les descripteurs d'appareils USB HID (Human Interface Device) peuvent placer et extraire l'\u00e9tat actuel, permettant de combiner les descriptions d'\u00e9l\u00e9ments en groupes \u00e0 plusieurs niveaux. FreeBSD prend en charge jusqu'\u00e0 4 niveaux d'extraction similaires. Si le niveau n'a pas \u00e9t\u00e9 restaur\u00e9 lors du traitement du m\u00eame \u00e9l\u00e9ment HID, cela entra\u00eene un acc\u00e8s \u00e0 une zone m\u00e9moire incorrecte. Le probl\u00e8me a \u00e9t\u00e9 corrig\u00e9 dans les mises \u00e0 jour FreeBSD 11.3-RELEASE-p10 et 12.1-RELEASE-p6. Pour contourner le probl\u00e8me, il est recommand\u00e9 d'installer le param\u00e8tre \u00ab sysctl hw.usb.disable_enumeration=1 \u00bb.<\/p>\n

La vuln\u00e9rabilit\u00e9 a \u00e9t\u00e9 identifi\u00e9e par Andy Nguyen de Google et ne se chevauche pas avec un autre probl\u00e8me r\u00e9cemment annonc\u00e9<\/a><\/noindex> des chercheurs de l'Universit\u00e9 Purdue et de l'\u00c9cole polytechnique f\u00e9d\u00e9rale de Lausanne. Ces chercheurs ont d\u00e9velopp\u00e9 l'outil USBFuzz, qui simule un appareil USB fonctionnant incorrectement pour tester les pilotes USB par fuzzing. USBFuzz sera bient\u00f4t disponible. publi\u00e9 sur GitHub<\/a><\/noindex>. Gr\u00e2ce \u00e0 ce nouvel outil, 26 vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes, dont 18 dans Linux, 4 dans Windows, 3 dans macOS et une dans FreeBSD. Les d\u00e9tails sur ces probl\u00e8mes ne sont pas encore r\u00e9v\u00e9l\u00e9s, il n'est mentionn\u00e9 que 10 vuln\u00e9rabilit\u00e9s ont re\u00e7u des identifiants CVE, et 11 probl\u00e8mes survenant sous Linux ont d\u00e9j\u00e0 \u00e9t\u00e9 corrig\u00e9s. Une technique de fuzzing similaire utilise<\/a><\/noindex> Andrey Konovalov de Google, qui a identifi\u00e9 au cours des derni\u00e8res ann\u00e9es des vuln\u00e9rabilit\u00e9s<\/a><\/noindex> 44<\/a><\/noindex> une vuln\u00e9rabilit\u00e9<\/a><\/noindex> dans la pile USB de Linux.<\/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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