{"id":93140,"date":"2020-09-03T07:42:03","date_gmt":"2020-09-03T05:42:03","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/kriticheskaya-uyazvimost-v-wordpress-plagine-file-manager-imeyushhem-700-tysyach-ustanovok"},"modified":"2020-09-03T07:42:03","modified_gmt":"2020-09-03T05:42:03","slug":"kriticheskaya-uyazvimost-v-wordpress-plagine-file-manager-imeyushhem-700-tysyach-ustanovok","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hr\/blog\/news\/kriticheskaya-uyazvimost-v-wordpress-plagine-file-manager-imeyushhem-700-tysyach-ustanovok","title":{"rendered":"Kriti\u010dna ranjivost u WordPress dodatku File Manager, koji ima 700 tisu\u0107a instalacija","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

U WordPress dodatku File Manager<\/a><\/noindex>, s vi\u0161e od 700 tisu\u0107a aktivnih instalacija, otkrivena je<\/a><\/noindex> postoji ranjivost koja omogu\u0107ava izvr\u0161avanje proizvoljnih naredbi i PHP skripti na poslu\u017eitelju. Problema se javlja u verzijama File Managera od 6.0 do 6.8 i ispravljena je u izdanju 6.9. <\/p>\n

Dodatak File Manager pru\u017ea alate za upravljanje datotekama za WordPress administratore, koriste\u0107i za niske razine manipulacije datotekama biblioteku uklju\u010denu u paket elFinder<\/a><\/noindex>. U izvornom kodu biblioteke elFinder nalaze se datoteke s primjerima koda koje se isporu\u010duju u radnom direktoriju s ekstenzijom «.dist». Ranljivost je uzrokovana time \u0161to je datoteka «connector.minimal.php.dist» preimenovana u «connector.minimal.php» i postala dostupna za izvr\u0161avanje prilikom slanja vanjskih zahtjeva. Spomenuti skript omogu\u0107ava izvr\u0161avanje svih operacija s datotekama (upload, open, editor, rename, rm itd.), budu\u0107i da se njegovi parametri prenose u funkciju run() glavnog plugina, \u0161to se mo\u017ee iskoristiti za zamjenu PHP-datoteka u WordPressu i pokretanje proizvoljnog koda.<\/p>\n

Opasnost se dodatno pove\u0107ava jer je ranjivost ve\u0107 koristi se<\/a><\/noindex> za provo\u0111enje automatiziranih napada, tijekom kojih se u katalog «plugins\/wp-file-manager\/lib\/files\/» pomo\u0107u naredbe «upload» u\u010ditava slika koja sadr\u017ei PHP-kod, a zatim se preimenuje u PHP-skript \u010dije ime se nasumi\u010dno bira i sadr\u017ei tekst «hard» ili «x.», na primjer, hardfork.php, hardfind.php, x.php itd.). Nakon pokretanja, PHP-kod dodaje le\u0111a kroz datoteke \/wp-admin\/admin-ajax.php i \/wp-includes\/user.php, pru\u017eaju\u0107i napada\u010dima pristup su\u010delju administratora stranice. Eksploatacija se vr\u0161i slanjem POST-zahtjeva datoteci «wp-file-manager\/lib\/php\/connector.minimal.php». <\/p>\n

Zanimljivo je da nakon hakiranja, osim ostavljanja backdoora, dolazi do promjena za za\u0161titu od daljnjih pristupa datoteci connector.minimal.php, u kojoj se nalazi ranjivost, s ciljem blokiranja mogu\u0107nosti napada na poslu\u017eitelj od strane drugih napada\u010da.
\nPrvi poku\u0161aji napada uo\u010deni su 1. rujna u 7 sati (UTC). U
\n12:33 (UTC) programeri plugina File Manager objavili su zakrpu. Prema podacima kompanije Wordfence, koja je otkrila ranjivost, njihova vatrozidna za\u0161tita blokirala je oko 450 tisu\u0107a poku\u0161aja eksploatacije ranjivosti u jednom danu. Skeniranje mre\u017ee pokazalo je da 52% web stranica koje koriste ovaj plugin jo\u0161 nije izvr\u0161ilo a\u017euriranje i ostaju ranjive. Nakon instalacije a\u017euriranja preporu\u010duje se provjeriti logove http-servera za pristup skripti «connector.minimal.php» kako bi se utvrdila eventualna kompromitacija sustava.<\/p>\n

Dodatno se mo\u017ee primijetiti korektivno izdanje WordPress 5.5.1<\/a><\/noindex> u kojem su predlo\u017eena 40 ispravki<\/a><\/noindex>.<\/p>\n

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

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

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