{"id":99301,"date":"2021-03-01T16:22:54","date_gmt":"2021-03-01T14:22:54","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-wpa_supplicant-ne-isklyuchayushhaya-udalyonnoe-vypolnenie-koda"},"modified":"2021-03-01T16:22:54","modified_gmt":"2021-03-01T14:22:54","slug":"uyazvimost-v-wpa_supplicant-ne-isklyuchayushhaya-udalyonnoe-vypolnenie-koda","status":"publish","type":"post","link":"https:\/\/prohoster.info\/de\/blog\/novosti-interneta\/uyazvimost-v-wpa_supplicant-ne-isklyuchayushhaya-udalyonnoe-vypolnenie-koda","title":{"rendered":"Sicherheitsanf\u00e4lligkeit in wpa_supplicant, die eine Remote-Ausf\u00fchrung von Code erm\u00f6glicht.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Im Paket wpa_supplicant, das f\u00fcr die Verbindung zu drahtlosen Netzwerken in vielen Linux-, *BSD- und Android-Distributionen verwendet wird, wurde eine Schwachstelle (CVE-2021-27803) entdeckt, die potenziell ausgenutzt werden kann, um schadhafter Code auszuf\u00fchren, wenn speziell gestaltete Steuerrahmen f\u00fcr Wi-Fi Direct (Wi-Fi P2P) verarbeitet werden. Um einen Angriff durchzuf\u00fchren, muss der Angreifer sich in Reichweite des drahtlosen Netzwerks befinden, um der Zielperson einen speziell gestalteten Rahmen zu senden. <\/p>\n

Das Problem wird durch einen Fehler im Wi-Fi P2P-Handler verursacht, der dazu f\u00fchrt, dass die Verarbeitung eines fehlerhaft gestalteten Rahmens (PDR - Provision Discovery Request) in einen Zustand f\u00fchrt, in dem der Eintrag eines alten P2P-Peers gel\u00f6scht wird und Informationen in einen bereits freigegebenen Speicherblock (use-after-free) geschrieben werden. Betroffen sind die Versionen wpa_supplicant von 1.0 bis 2.9, die mit der Option CONFIG_P2P kompiliert wurden. <\/p>\n

Die Schwachstelle wird in der Version wpa_supplicant 2.10 behoben. In den Distributionen wurde ein Update mit dem Fix f\u00fcr Fedora Linux ver\u00f6ffentlicht. Den Status der Ver\u00f6ffentlichung von Updates durch andere Distributionen k\u00f6nnen Sie auf den Seiten: Debian, Ubuntu, RHEL, SUSE, Arch Linux verfolgen. Als Workaround zur Blockierung der Schwachstelle reicht es aus, die Unterst\u00fctzung f\u00fcr P2P zu deaktivieren, indem Sie in den Einstellungen \u201ep2p_disabled=1\u201c angeben oder im CLI-Interface den Befehl \u201eP2P_SET disabled 1\u201c ausf\u00fchren.
\n
Quelle: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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Um einen Angriff durchzuf\u00fchren, muss sich der Angreifer in Reichweite des drahtlosen Netzwerks befinden, um dem Opfer speziell gestaltete Pakete zu senden.","canonical_url":"https:\/\/prohoster.info\/de\/blog\/novosti-interneta\/uyazvimost-v-wpa_supplicant-ne-isklyuchayushhaya-udalyonnoe-vypolnenie-koda","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"de_DE","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 wpa_supplicant, \u043d\u0435 \u0438\u0441\u043a\u043b\u044e\u0447\u0430\u044e\u0449\u0430\u044f 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