{"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\/nl\/blog\/news\/kriticheskaya-uyazvimost-v-wordpress-plagine-file-manager-imeyushhem-700-tysyach-ustanovok","title":{"rendered":"Kritieke kwetsbaarheid in de WordPress-plug-in File Manager, die 700 duizend installaties heeft","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>In de WordPress-plugin <noindex><a rel=\"nofollow\" href=\"https:\/\/wordpress.org\/plugins\/wp-file-manager\/\">Bestandsbeheerder<\/a><\/noindex>, met meer dan 700.000 actieve installaties, <noindex><a rel=\"nofollow\" href=\"https:\/\/www.wordfence.com\/blog\/2020\/09\/700000-wordpress-users-affected-by-zero-day-vulnerability-in-file-manager-plugin\/\">gedetecteerd<\/a><\/noindex> een kwetsbaarheid die het mogelijk maakt om willekeurige opdrachten en PHP-scripts op de server uit te voeren. Het probleem doet zich voor in de versies van Bestandsbeheerder van 6.0 tot 6.8 en is opgelost in versie 6.9. <\/p>\n<p>De plugin Bestandsbeheerder biedt hulpmiddelen voor bestandbeheer voor de WordPress-beheerder, gebruikmakend van de ingebouwde bibliotheek voor laag-niveau bestandshandelingen. <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/Studio-42\/elFinder\">elFinder<\/a><\/noindex>. In de broncode van de elFinder-bibliotheek zijn bestanden met bijvoorbeeld code aanwezig, die in de werkmap worden geleverd met de extensie &#171;.dist&#187;. De kwetsbaarheid ontstaat doordat het bestand &#171;connector.minimal.php.dist&#187; bij de levering van de bibliotheek werd hernoemd naar &#171;connector.minimal.php&#187; en toegankelijk werd voor uitvoering bij het verzenden van externe aanvragen. Het opgegeven script maakt het mogelijk om allerlei bestandsbewerkingen uit te voeren (uploaden, openen, bewerken, hernoemen, verwijderen, enz.), aangezien de parameters worden doorgegeven aan de functie run() van de belangrijkste plugin, wat kan worden gebruikt om PHP-bestanden in WordPress te vervangen en willekeurige code uit te voeren.<\/p>\n<p>Het gevaar wordt verergerd doordat de kwetsbaarheid al <noindex><a rel=\"nofollow\" href=\"https:\/\/blog.nintechnet.com\/critical-zero-day-vulnerability-fixed-in-wordpress-file-manager-700000-installations\/\">de DNS-server van CloudFlare wordt gebruikt, zal in Chrome slechts de methode van de DNS-verwerking worden bijgewerkt naar een equivalente service, zonder wisseling van de DNS-provider. Bijvoorbeeld, als een gebruiker in de systeeminstellingen de DNS 8.8.8.8 heeft opgegeven, zal in Chrome<\/a><\/noindex> voor het uitvoeren van geautomatiseerde aanvallen, waarbij een afbeelding met PHP-code wordt ge\u00fcpload naar de map &#171;plugins\/wp-file-manager\/lib\/files\/&#187; met behulp van het commando &#171;upload&#187;, die vervolgens wordt hernoemd naar een PHP-script, waarvan de naam willekeurig wordt gekozen en de tekst &#171;hard&#187; of &#171;x.&#187; bevat, bijvoorbeeld hardfork.php, hardfind.php, x.php, enz. Na het uitvoeren van de PHP-code wordt er een backdoor toegevoegd aan de bestanden \/wp-admin\/admin-ajax.php en \/wp-includes\/user.php, waarmee aanvallers toegang krijgen tot de admininterface van de site. Exploitatie gebeurt door een POST-aanroep naar het bestand &#171;wp-file-manager\/lib\/php\/connector.minimal.php&#187; te sturen. <\/p>\n<p>Opmerkelijk is dat er na de hack naast het achterlaten van de backdoor ook wijzigingen worden aangebracht ter bescherming tegen verdere toegang tot het bestand connector.minimal.php, waarin de kwetsbaarheid zich bevindt, om te voorkomen dat andere aanvallers de server aanvallen.<br \/>\nDe eerste pogingen tot aanval werden op 1 september om 7 uur 's ochtends (UTC) vastgesteld. In<br \/>\n12:33 (UTC) hebben de ontwikkelaars van de File Manager-plugin een patch vrijgegeven. Volgens het bedrijf Wordfence, dat de kwetsbaarheid heeft ontdekt, heeft hun firewall ongeveer 450.000 pogingen om de kwetsbaarheid uit te buiten binnen een dag geblokkeerd. Netwerkonderzoek heeft aangetoond dat 52% van de sites die deze plugin gebruiken nog niet zijn ge\u00fcpdatet en kwetsbaar blijven. Na het installeren van de update is het raadzaam om de http-serverlog te controleren op aanroepen naar het script &#171;connector.minimal.php&#187; om vast te stellen of het systeem gecompromitteerd is.<\/p>\n<p>Daarnaast kan de correctie-update worden opgemerkt <noindex><a rel=\"nofollow\" href=\"https:\/\/wordpress.org\/news\/2020\/09\/wordpress-5-5-1-maintenance-release\/\">WordPress 5.5.1<\/a><\/noindex> waarin wordt voorgesteld <noindex><a rel=\"nofollow\" href=\"https:\/\/core.trac.wordpress.org\/query?status=closed&#038;milestone=5.5.1&#038;group=status&#038;col=id&#038;col=summary&#038;col=milestone&#038;col=owner&#038;col=type&#038;col=status&#038;col=priority&#038;order=priority\">40 correcties<\/a><\/noindex>.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Bron: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=53646\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 WordPress-\u043f\u043b\u0430\u0433\u0438\u043d\u0435 File Manager, \u043d\u0430\u0441\u0447\u0438\u0442\u044b\u0432\u0430\u044e\u0449\u0435\u043c \u0431\u043e\u043b\u0435\u0435 700 \u0442\u044b\u0441\u044f\u0447 \u0430\u043a\u0442\u0438\u0432\u043d\u044b\u0445 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043e\u043a, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0437\u0430\u043f\u0443\u0441\u043a\u0430\u0442\u044c \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0435 \u043a\u043e\u043c\u0430\u043d\u0434\u044b \u0438 PHP-\u0441\u043a\u0440\u0438\u043f\u0442\u044b \u043d\u0430 \u0441\u0435\u0440\u0432\u0435\u0440\u0435. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0432 \u0432\u044b\u043f\u0443\u0441\u043a\u0430\u0445 File Manager \u0441 6.0 \u043f\u043e 6.8 \u0438 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0432 \u0432\u044b\u043f\u0443\u0441\u043a\u0435 6.9. \u041f\u043b\u0430\u0433\u0438\u043d File Manager \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u044b \u0434\u043b\u044f \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0444\u0430\u0439\u043b\u0430\u043c\u0438 \u0434\u043b\u044f \u0430\u0434\u043c\u0438\u043d\u0438\u0441\u0442\u0440\u0430\u0442\u043e\u0440\u0430 WordPress, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044f \u0434\u043b\u044f \u043d\u0438\u0437\u043a\u043e\u0443\u0440\u043e\u0432\u043d\u0435\u0432\u044b\u0445 \u043c\u0430\u043d\u0438\u043f\u0443\u043b\u044f\u0446\u0438\u0439 \u0441 \u0444\u0430\u0439\u043b\u0430\u043c\u0438 \u0432\u0445\u043e\u0434\u044f\u0449\u0443\u044e \u0432 \u0441\u043e\u0441\u0442\u0430\u0432 [&hellip;]<\/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-93140","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412 WordPress-\u043f\u043b\u0430\u0433\u0438\u043d\u0435 File Manager, \u043d\u0430\u0441\u0447\u0438\u0442\u044b\u0432\u0430\u044e\u0449\u0435\u043c \u0431\u043e\u043b\u0435\u0435 700 \u0442\u044b\u0441\u044f\u0447 \u0430\u043a\u0442\u0438\u0432\u043d\u044b\u0445 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043e\u043a,\" \/>\n\t<meta name=\"robots\" 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