{"id":121283,"date":"2025-01-09T15:46:01","date_gmt":"2025-01-09T13:46:01","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-openvpn-dopuskayushhaya-podstanovku-dannyh-v-plaginy-i-storonnie-obrabotchiki"},"modified":"2025-01-09T15:46:01","modified_gmt":"2025-01-09T13:46:01","slug":"uyazvimost-v-openvpn-dopuskayushhaya-podstanovku-dannyh-v-plaginy-i-storonnie-obrabotchiki","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/uyazvimost-v-openvpn-dopuskayushhaya-podstanovku-dannyh-v-plaginy-i-storonnie-obrabotchiki","title":{"rendered":"Zranitelnost v OpenVPN umo\u017e\u0148uj\u00edc\u00ed substituci dat v pluggin\u00e1ch a extern\u00edch zpracovatel\u00edch","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Byly odhaleny informace o zranitelnosti (CVE-2024-5594) v bal\u00ed\u010dku pro vytv\u00e1\u0159en\u00ed virtu\u00e1ln\u00edch priv\u00e1tn\u00edch s\u00edt\u00ed OpenVPN, kter\u00e1 m\u016f\u017ee v\u00e9st k vkl\u00e1d\u00e1n\u00ed libovoln\u00fdch dat do extern\u00edch spustiteln\u00fdch soubor\u016f nebo plugin\u016f na stran\u011b syst\u00e9mu, s n\u00edm\u017e je nav\u00e1z\u00e1no spojen\u00ed. Zranitelnost je zp\u016fsobena nedostatkem kontroly na p\u0159\u00edtomnost nulov\u00fdch bajt\u016f a nespr\u00e1vn\u00fdch znak\u016f p\u0159i zpracov\u00e1n\u00ed ovl\u00e1dac\u00edch zpr\u00e1v, jako jsou PUSH_REPLY. <\/p>\n

Probl\u00e9m byl odstran\u011bn ve verz\u00edch OpenVPN 2.5.11 a 2.6.11, kter\u00e9 byly vyd\u00e1ny v \u010dervnu 2024. V pozn\u00e1mce k verzi byla zranitelnost charakterizov\u00e1na jako nev\u00fdznamn\u00fd probl\u00e9m, kter\u00fd vedl k z\u00e1pisu odpadu do protokolu nebo zv\u00fd\u0161en\u00ed zat\u00ed\u017een\u00ed CPU. V aktualizaci publikovan\u00e9 p\u0159ed n\u011bkolika dny byla tato z\u00e1le\u017eitost p\u0159e\u0159azena mezi kritick\u00e9 (\u00farove\u0148 nebezpe\u010d\u00ed 9.1 z 10). <\/p>\n

Podrobnosti o provozu zat\u00edm nejsou uvedeny. Opravy byly omezeny na p\u0159eru\u0161en\u00ed zpracov\u00e1n\u00ed zpr\u00e1v s neplatn\u00fdmi znaky a na kontrolu neplatn\u00fdch znak\u016f v cel\u00e9m bufferu, nikoli pouze v \u010d\u00e1sti p\u0159ed nulov\u00fdm bajtem. Kontrola speci\u00e1ln\u00edch znak\u016f a nulov\u00e9ho bajtu byla p\u0159id\u00e1na pro p\u0159\u00edkazy «AUTH_FAILED», «PUSH_*», «RESTART», «HALT», «INFO_PRE», «INFO», «CR_RESPONSE», «AUTH_PENDING» a «EXIT».
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0420\u0430\u0441\u043a\u0440\u044b\u0442\u044b \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u043e\u0431 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (CVE-2024-5594) \u0432 \u043f\u0430\u043a\u0435\u0442\u0435 \u0434\u043b\u044f \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u0432\u0438\u0440\u0442\u0443\u0430\u043b\u044c\u043d\u044b\u0445 \u0447\u0430\u0441\u0442\u043d\u044b\u0445 \u0441\u0435\u0442\u0435\u0439 OpenVPN, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u043f\u043e\u0434\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0435 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0445 \u0434\u0430\u043d\u043d\u044b\u0445 \u0432 \u0441\u0442\u043e\u0440\u043e\u043d\u043d\u0438\u0435 \u0438\u0441\u043f\u043e\u043b\u043d\u044f\u0435\u043c\u044b\u0435 \u0444\u0430\u0439\u043b\u044b \u0438\u043b\u0438 \u043f\u043b\u0430\u0433\u0438\u043d\u044b \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u043d\u0430 \u0434\u0440\u0443\u0433\u043e\u0439 \u0441\u0442\u043e\u0440\u043e\u043d\u0435 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u044f. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u0435\u043c \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u043d\u0430\u043b\u0438\u0447\u0438\u044f \u043d\u0443\u043b\u0435\u0432\u044b\u0445 \u0431\u0430\u0439\u0442\u043e\u0432 \u0438 \u043d\u0435\u043a\u043e\u0440\u0440\u0435\u043a\u0442\u043d\u044b\u0445 \u0441\u0438\u043c\u0432\u043e\u043b\u043e\u0432 \u043f\u0440\u0438 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0435 \u0443\u043f\u0440\u0430\u0432\u043b\u044f\u044e\u0449\u0438\u0445 \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u0439, \u0442\u0430\u043a\u0438\u0445 \u043a\u0430\u043a PUSH_REPLY. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 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