{"id":53577,"date":"2019-12-05T00:00:00","date_gmt":"2019-12-04T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/mnozhestvennye-uyazvimosti-v-openbsd"},"modified":"2020-02-18T14:01:30","modified_gmt":"2020-02-18T11:01:30","slug":"mnozhestvennye-uyazvimosti-v-openbsd","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sl\/blog\/news\/mnozhestvennye-uyazvimosti-v-openbsd","title":{"rendered":"Ve\u010d ranljivosti v OpenBSD","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Strokovnjaki iz Qualys Labs so odkrili ve\u010d varnostnih te\u017eav, povezanih z mo\u017enostjo zavajanja programov, odgovornih za izvajanje mehanizmov preverjanja gesel v BSD (analog PAM). Zavajanje se zgodi pri prenosu uporabni\u0161kega imena «-schallenge» ali «-schallenge:passwd», ki nato ni interpretirano kot uporabni\u0161ko ime, temve\u010d kot mo\u017enost. Po tem sistem sprejme katero koli geslo. Ranljivi so, torej dovoljujejo nepoobla\u0161\u010den dostop, storitve smtpd, ldapd, radiusd. Storitev sshd se ne da izkori\u0161\u010dati, saj sshd opazi, da uporabnik «-schallenge» v resnici ne obstaja. Program su pri poskusu izkori\u0161\u010danja pade, saj prav tako posku\u0161a ugotoviti uid neobstoje\u010dega uporabnika.<\/p>\n

Objavljene so bile tudi raznolike ranljivosti v xlock, pri avtentikaciji preko S\/Kyy in Yubikey ter v su, ki niso povezane z navedbo uporabnika «-schallenge». Ranljivost v xlock omogo\u010da navadnemu uporabniku, da pove\u010da privilegije do skupine auth. Zaradi nepravilnega delovanja mehanizmov avtentikacije preko S\/Kyy in Yubikey je mogo\u010de zvi\u0161ati privilegije od skupine auth do uporabnika root, vendar v privzeti konfiguraciji OpenBSD to ne deluje, saj je avtentikacija preko S\/Kyy in Yubikey izklopljena. Na koncu ranljivost v su omogo\u010da uporabniku, da pove\u010da omejitve na sistemske vire, kot je \u0161tevilo odprtih datote\u010dnih descriptorjev.<\/p>\n

Trenutno so ranljivosti odpravljene, varnostne posodobitve pa so na voljo preko obi\u010dajnega mehanizma syspatch(8).<\/p>\n

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

\u0421\u043f\u0435\u0446\u0438\u0430\u043b\u0438\u0441\u0442\u044b \u0438\u0437 Qualys Labs \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0438\u043b\u0438 \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u043f\u0440\u043e\u0431\u043b\u0435\u043c \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u0445 \u0441 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c\u044e \u043e\u0431\u043c\u0430\u043d\u0443\u0442\u044c \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u044b, \u043e\u0442\u0432\u0435\u0447\u0430\u044e\u0449\u0438\u0435 \u0437\u0430 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u044b\u0435 \u0432 BSD \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u044b \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u043f\u0430\u0440\u043e\u043b\u0435\u0439 (\u0430\u043d\u0430\u043b\u043e\u0433 PAM). \u041e\u0431\u043c\u0430\u043d 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\u0438\u0442\u043e\u0433\u0435 \u043d\u0435\u0441\u0430\u043d\u043a\u0446\u0438\u043e\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u0434\u043e\u0441\u0442\u0443\u043f, […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-53577","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Ve\u010d ranljivosti v OpenBSD | ProHoster","description":"Specialisti iz Qualys Labs so odkrili nekaj varnostnih te\u017eav, povezanih z mo\u017enostjo zavajanja programov, odgovornih za mehanizme preverjanja gesel, uporabljene v BSD (analog 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