{"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\/cs\/blog\/news\/uyazvimost-v-wpa_supplicant-ne-isklyuchayushhaya-udalyonnoe-vypolnenie-koda","title":{"rendered":"Zranitelnost v wpa_supplicant, neumo\u017e\u0148uj\u00edc\u00ed vzd\u00e1len\u00e9 prov\u00e1d\u011bn\u00ed k\u00f3du","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

V bal\u00edku wpa_supplicant, kter\u00fd se pou\u017e\u00edv\u00e1 k organizaci p\u0159ipojen\u00ed k bezdr\u00e1tov\u00e9 s\u00edti ve mnoha distribuc\u00edch Linuxu, *BSD a Androidu, byla zji\u0161t\u011bna zranitelnost (CVE-2021-27803), kter\u00e1 m\u016f\u017ee b\u00fdt potenci\u00e1ln\u011b vyu\u017eita k proveden\u00ed k\u00f3du \u00fato\u010dn\u00edka p\u0159i zpracov\u00e1n\u00ed speci\u00e1ln\u011b form\u00e1tovan\u00fdch \u0159\u00edd\u00edc\u00edch r\u00e1mc\u016f Wi-Fi Direct (Wi-Fi P2P). Pro proveden\u00ed \u00fatoku mus\u00ed b\u00fdt \u00fato\u010dn\u00edk v dosahu bezdr\u00e1tov\u00e9 s\u00edt\u011b, aby ob\u011bti poslal speci\u00e1ln\u011b form\u00e1tovan\u00fd soubor r\u00e1mc\u016f. <\/p>\n

Probl\u00e9m je zp\u016fsoben chybou v procesu Wi-Fi P2P, kv\u016fli kter\u00e9 m\u016f\u017ee zpracov\u00e1n\u00ed nespr\u00e1vn\u011b form\u00e1tovan\u00e9ho r\u00e1mce PDR (Provision Discovery Request) v\u00e9st k situaci, kdy je vymaz\u00e1n z\u00e1znam o star\u00e9m P2P partnerovi a informace je zaps\u00e1na do ji\u017e uvoln\u011bn\u00e9ho bloku pam\u011bti (use-after-free). Probl\u00e9mu jsou n\u00e1chyln\u00e9 verze wpa_supplicant od 1.0 do 2.9, sestaven\u00e9 s volbou CONFIG_P2P. <\/p>\n

Zranitelnost bude opravena ve verzi wpa_supplicant 2.10. V distribu\u010dn\u00edch verz\u00edch bylo zve\u0159ejn\u011bno aktualizace s opravou pro Fedora Linux. Stav zve\u0159ejn\u011bn\u00ed aktualizac\u00ed ostatn\u00edmi distribucemi lze sledovat na str\u00e1nk\u00e1ch: Debian, Ubuntu, RHEL, SUSE, Arch Linux. Jako workaround pro zablokov\u00e1n\u00ed zranitelnosti sta\u010d\u00ed vypnout podporu P2P t\u00edm, \u017ee v nastaven\u00ed uvedete 'p2p_disabled=1' nebo proveden\u00edm p\u0159\u00edkazu 'P2P_SET disabled 1' v CLI rozhran\u00ed.
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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\u043a\u043e\u0434\u0430 \u0437\u043b\u043e\u0443\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0438\u043a\u0430 \u043f\u0440\u0438 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0435 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u044b\u0445 \u0443\u043f\u0440\u0430\u0432\u043b\u044f\u044e\u0449\u0438\u0445 \u043a\u0430\u0434\u0440\u043e\u0432 Wi-Fi Direct (Wi-Fi P2P). \u0414\u043b\u044f \u043f\u0440\u043e\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u0430\u0442\u0430\u043a\u0438 \u0437\u043b\u043e\u0443\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0438\u043a \u0434\u043e\u043b\u0436\u0435\u043d \u043d\u0430\u0445\u043e\u0434\u0438\u0442\u0441\u044f \u0432 \u043f\u0440\u0435\u0434\u0435\u043b\u0430\u0445 \u0434\u043e\u0441\u044f\u0433\u0430\u0435\u043c\u043e\u0441\u0442\u0438 \u0431\u0435\u0441\u043f\u0440\u043e\u0432\u043e\u0434\u043d\u043e\u0439 \u0441\u0435\u0442\u0438, \u0447\u0442\u043e\u0431\u044b 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