{"id":86356,"date":"2020-06-24T13:42:00","date_gmt":"2020-06-24T11:42:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-zashhishhyonnom-brauzere-bitdefender-safepay-privodyashhaya-k-vypolneniyu-koda"},"modified":"2020-06-24T13:42:00","modified_gmt":"2020-06-24T11:42:00","slug":"uyazvimost-v-zashhishhyonnom-brauzere-bitdefender-safepay-privodyashhaya-k-vypolneniyu-koda","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/uyazvimost-v-zashhishhyonnom-brauzere-bitdefender-safepay-privodyashhaya-k-vypolneniyu-koda","title":{"rendered":"Sebezhet\u0151s\u00e9g a Bitdefender SafePay biztons\u00e1gos b\u00f6ng\u00e9sz\u0151j\u00e9ben, amely k\u00f3dv\u00e9grehajt\u00e1sra vezethet","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Vladimir Palant, az Adblock Plus alkot\u00f3ja, felfedezte<\/a><\/noindex> vulnerability<\/a><\/noindex> (CVE-2020-8102<\/a><\/noindex>) a Chromium motorra \u00e9p\u00fcl\u0151 speci\u00e1lis Safepay b\u00f6ng\u00e9sz\u0151ben, amely a Bitdefender Total Security 2020 antiv\u00edrus csomag r\u00e9szek\u00e9nt \u00e9rhet\u0151 el, \u00e9s a felhaszn\u00e1l\u00f3 biztons\u00e1gosabb internetes munk\u00e1j\u00e1t c\u00e9lozza meg (p\u00e9ld\u00e1ul, extra elszigetel\u00e9st biztos\u00edt a bankokkal \u00e9s a fizet\u00e9si rendszerekkel val\u00f3 kapcsolattart\u00e1s sor\u00e1n). Az vesz\u00e9lyeztetett \u00e1llapot lehet\u0151v\u00e9 teszi, hogy a b\u00f6ng\u00e9sz\u0151ben megnyitott webhelyek tetsz\u0151leges k\u00f3dot hajtsanak v\u00e9gre az oper\u00e1ci\u00f3s rendszer szintj\u00e9n.<\/p>\n

A probl\u00e9ma oka az, hogy a Bitdefender antiv\u00edrus helyi szinten lehallgatja a HTTPS forgalmat az eredeti TLS tan\u00fas\u00edtv\u00e1ny helyettes\u00edt\u00e9s\u00e9vel. Az \u00fcgyf\u00e9l rendszer\u00e9n egy tov\u00e1bbi gy\u00f6k\u00e9r tan\u00fas\u00edtv\u00e1ny ker\u00fcl telep\u00edt\u00e9sre, amely lehet\u0151v\u00e9 teszi a forgalmiellen\u0151rz\u0151 rendszer m\u0171k\u00f6d\u00e9s\u00e9nek elrejt\u00e9s\u00e9t. Az antiv\u00edrus beavatkozik a v\u00e9dett forgalomba, \u00e9s bizonyos oldalakra saj\u00e1t JavaScript k\u00f3dot illeszt be a Safe Search funkci\u00f3 v\u00e9grehajt\u00e1s\u00e1hoz, m\u00edg a v\u00e9dett kapcsolat tan\u00fas\u00edtv\u00e1ny\u00e1val kapcsolatos probl\u00e9m\u00e1k eset\u00e9n az hib\u00e1s oldal kiad\u00e1s\u00e1t a saj\u00e1tj\u00e1val helyettes\u00edti. Mivel az \u00faj hibaoldal a megnyitott szerver nev\u00e9ben ker\u00fcl kiad\u00e1sra, a szerver tov\u00e1bbi oldalai teljes hozz\u00e1f\u00e9r\u00e9ssel b\u00edrnak a Bitdefender \u00e1ltal besz\u00fart tartalomhoz.<\/p>\n

Amikor egy t\u00e1mad\u00f3 \u00e1ltal ir\u00e1ny\u00edtott weboldalt nyitunk meg, ez az oldal XMLHTTPRequest k\u00e9rd\u00e9st k\u00fcldhet \u00e9s szimul\u00e1lhatja a HTTPS tan\u00fas\u00edtv\u00e1ny probl\u00e9m\u00e1j\u00e1t a v\u00e1laszban, ami a Bitdefender \u00e1ltal megv\u00e1ltoztatott hib\u00e1hoz vezet. Mivel a hibaoldal a t\u00e1mad\u00f3 domain keret\u00e9ben ny\u00edlik meg, az olvashatja a Bitdefender m\u00f3dos\u00edtott oldal\u00e1nak tartalm\u00e1t. A Bitdefender \u00e1ltal k\u00edn\u00e1lt oldalon szerepel egy session kulcs is, amely lehet\u0151v\u00e9 teszi, hogy a Bitdefender bels\u0151 API-j\u00e1n kereszt\u00fcl ind\u00edtson egy k\u00fcl\u00f6n Safepay b\u00f6ng\u00e9sz\u0151i \u00fcl\u00e9st, tetsz\u0151leges parancssori kapcsol\u00f3kat megadva, \u00e9s b\u00e1rminem\u0171 rendszerszint\u0171 parancsok v\u00e9grehajt\u00e1s\u00e1t el\u00e9rje az «—utility-cmd-prefix» kapcsol\u00f3 seg\u00edts\u00e9g\u00e9vel. P\u00e9lda az exploit-ra (param1 \u00e9s param2 — \u00e9rt\u00e9kek, amelyeket a hibaoldalr\u00f3l kaptunk):<\/p>\n

var request = new XMLHttpRequest();
\n request.open(«POST», Math.random());
\n request.setRequestHeader(«Content-type», «application\/x-www-form-urlencoded»);
\n request.setRequestHeader(«BDNDSS_B67EA559F21B487F861FDA8A44F01C50», param1);
\n request.setRequestHeader(«BDNDCA_BBACF84D61A04F9AA66019A14B035478», param2);
\n request.setRequestHeader(«BDNDWB_5056E556833D49C1AF4085CB254FC242», «obk.run»);
\n request.setRequestHeader(«BDNDOK_4E961A95B7B44CBCA1907D3D3643370D», location.href);
\n request.send(«data:text\/html,nada —utility-cmd-prefix=\»cmd.exe \/k whoami & echo\»»);<\/p>\n

\"Sebezhet\u0151s\u00e9g<\/a><\/noindex><\/center><\/p>\n

Eml\u00e9keztet\u00fcnk, hogy a 2017-ben v\u00e9gzett kutat\u00e1s megmutatta<\/a><\/noindex>, amely alapj\u00e1n 24 a 26 tesztelt v\u00edrusirt\u00f3 term\u00e9k, amely HTTPS forgalmat ellen\u0151riz HTTPS tan\u00fas\u00edtv\u00e1nyok cser\u00e9j\u00e9vel, cs\u00f6kkentette a HTTPS kapcsolat \u00e1ltal\u00e1nos biztons\u00e1gi szintj\u00e9t.
\nA megfelel\u0151 titkos\u00edt\u00e1si szettek csak 11 a 26 term\u00e9kben voltak el\u00e9rhet\u0151ek. 5 rendszer nem ellen\u0151rizte a tan\u00fas\u00edtv\u00e1nyokat (Kaspersky Internet Security 16 Mac, NOD32 AV 9, CYBERsitter, Net Nanny 7 Win, Net Nanny 7 Mac). A Kaspersky Internet Security \u00e9s a Total Security term\u00e9kek s\u00e9r\u00fcl\u00e9kenyek voltak t\u00e1mad\u00e1sokkal szemben. CRIME<\/a><\/noindex>, m\u00edg az AVG, Bitdefender \u00e9s Bullguard term\u00e9kek t\u00e1mad\u00e1sokkal szemben v\u00e9dtelenek. Logjam<\/a><\/noindex> \u00e9s POODLE<\/a><\/noindex>. A Dr.Web Antivirus 11 term\u00e9k lehet\u0151v\u00e9 teszi, hogy visszat\u00e9rj\u00fcnk megb\u00edzhatatlan export titkos\u00edt\u00e1sokhoz (t\u00e1mad\u00e1s FREAK<\/a><\/noindex>).<\/p>\n

<\/a><\/noindex><\/p>\n

Forr\u00e1s: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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\u043e\u0442\u043a\u0440\u044b\u0432\u0430\u0435\u043c\u044b\u043c \u0432 \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0435 \u0441\u0430\u0439\u0442\u0430\u043c \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0439 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":86357,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-86356","post","type-post","status-publish","format-standard","has-post-thumbnail","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\udd47Sebezhet\u0151s\u00e9g a Bitdefender SafePay v\u00e9dett b\u00f6ng\u00e9sz\u0151j\u00e9ben, amely 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