{"id":33388,"date":"2019-10-31T21:52:18","date_gmt":"2019-10-31T18:52:18","guid":{"rendered":"https:\/\/prohoster.info\/blog\/uyazvimost-v-biblioteke-pharstreamwrapper-zatragivayushhaya-drupal-joomla-i-typo3\/"},"modified":"2019-10-31T21:52:18","modified_gmt":"2019-10-31T18:52:18","slug":"uyazvimost-v-biblioteke-pharstreamwrapper-zatragivayushhaya-drupal-joomla-i-typo3","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/news\/uyazvimost-v-biblioteke-pharstreamwrapper-zatragivayushhaya-drupal-joomla-i-typo3","title":{"rendered":"Zranite\u013enos\u0165 v kni\u017enici PharStreamWrapper, ktor\u00e1 sa dot\u00fdka Drupal, Joomla a Typo3","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>V kni\u017enici <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/TYPO3\/phar-stream-wrapper\">PharStreamWrapper<\/a><\/noindex>, poskytuj\u00facou spracovate\u013eov na ochranu pred <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=49746\">vykonan\u00edm<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=49641\">\u00fatokmi<\/a><\/noindex> prostredn\u00edctvom substit\u00facie s\u00faborov vo form\u00e1te &#171;Phar&#187;, <noindex><a rel=\"nofollow\" href=\"https:\/\/typo3.org\/security\/advisory\/typo3-psa-2019-007\/\">bola zisten\u00e1<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.drupal.org\/sa-core-2019-007\">zranite\u013enos\u0165<\/a><\/noindex> (<noindex><a rel=\"nofollow\" href=\"https:\/\/security-tracker.debian.org\/tracker\/CVE-2019-11831\">CVE-2019-11831<\/a><\/noindex>), \u010do umo\u017e\u0148uje ob\u00eds\u0165 ochranu pred deserializ\u00e1ciou k\u00f3du prostredn\u00edctvom substit\u00facie znakov &#171;..&#187; v ceste. Napr\u00edklad, \u00fato\u010dn\u00edk m\u00f4\u017ee pou\u017ei\u0165 na \u00fatok URL vo forme &#171;phar:\/\/path\/bad.phar\/....\/good.phar&#187; a kni\u017enica pri kontrole vy\u010dlen\u00ed z\u00e1kladn\u00e9 meno &#171;\/path\/good.phar&#187;, hoci pri \u010fal\u0161ej spracovan\u00ed podobnej cesty bude pou\u017eit\u00fd s\u00fabor &#171;\/path\/bad.phar&#187;.<\/p>\n<p>Kni\u017enica bola vyvinut\u00e1 tvorcami CMS TYPO3, ale tie\u017e sa aplikuje v projektoch Drupal a Joomla, \u010do ich rob\u00ed taktie\u017e n\u00e1chyln\u00fdmi na zranite\u013enos\u0165. Probl\u00e9m bol vyrie\u0161en\u00fd vo vydaniach <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/TYPO3\/phar-stream-wrapper\/releases\">PharStreamWrapper 2.1.1 a 3.1.1<\/a><\/noindex>. Projekt Drupal opravil probl\u00e9m v aktualiz\u00e1ci\u00e1ch 7.67, 8.6.16 a 8.7.1. V Joomla sa probl\u00e9m prejavuje od verzie 3.9.3 a bol vyrie\u0161en\u00fd vo vydan\u00ed 3.9.6. Na odstr\u00e1nenie probl\u00e9mu v TYPO3 je potrebn\u00e9 aktualizova\u0165 kni\u017enicu PharStreamWapper.<\/p>\n<p>Z praktick\u00e9ho h\u013eadiska zranite\u013enos\u0165 v PharStreamWapper umo\u017e\u0148uje pou\u017e\u00edvate\u013eovi Drupal Core, ktor\u00fd m\u00e1 opr\u00e1vnenia spr\u00e1vcu t\u00e9m (&#8216;Administer theme&#8217;), nahra\u0165 \u0161kodliv\u00fd phar-s\u00fabor a dosiahnu\u0165 vykonanie PHP k\u00f3du umiestnen\u00e9ho v \u0148om ako legit\u00edmneho phar-arch\u00edvu. Pripome\u0148me, \u017ee podstata \u00fatoku &#171;Phar deserialization&#187; spo\u010d\u00edva v tom, \u017ee pri kontrole nahr\u00e1van\u00fdch s\u00faborov pomocou PHP-funkcie file_exists(), t\u00e1to funkcia automaticky vykon\u00e1va deserializ\u00e1ciu metad\u00e1t zo s\u00faborov Phar (PHP Archive) pri spracovan\u00ed ciest za\u010d\u00ednaj\u00facich na &#171;phar:\/\/&#187;. Prenos phar-s\u00faboru je mo\u017en\u00fd pod z\u00e1mienkou obr\u00e1zka, preto\u017ee funkcia file_exists() ur\u010duje MIME typ na z\u00e1klade obsahu, a nie na z\u00e1klade pr\u00edpony.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Zdroj: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=50665\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0435 PharStreamWrapper, \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0435\u0439 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 \u0434\u043b\u044f \u0437\u0430\u0449\u0438\u0442\u044b \u043e\u0442 \u043f\u0440\u043e\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u0430\u0442\u0430\u043a \u0447\u0435\u0440\u0435\u0437 \u043f\u043e\u0434\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0443 \u0444\u0430\u0439\u043b\u043e\u0432 \u0432 \u0444\u043e\u0440\u043c\u0430\u0442\u0435 &#171;Phar&#187;, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2019-11831), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043e\u0431\u043e\u0439\u0442\u0438 \u0437\u0430\u0449\u0438\u0442\u0443 \u043e\u0442 \u0434\u0435\u0441\u0435\u0440\u0438\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u043a\u043e\u0434\u0430 \u0447\u0435\u0440\u0435\u0437 \u043f\u043e\u0434\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0443 \u0441\u0438\u043c\u0432\u043e\u043b\u043e\u0432 &#171;..&#187; \u0432 \u043f\u0443\u0442\u0438. \u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0438\u0439 \u043c\u043e\u0436\u0435\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0434\u043b\u044f \u0430\u0442\u0430\u043a\u0438 URL \u0432\u0438\u0434\u0430 &#171;phar:\/\/\/path\/bad.phar\/..\/good.phar&#187; \u0438 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430 \u0432\u044b\u0434\u0435\u043b\u0438\u0442 \u043f\u0440\u0438 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0435 \u0431\u0430\u0437\u043e\u0432\u043e\u0435 \u0438\u043c\u044f &#171;\/path\/good.phar&#187;, \u0445\u043e\u0442\u044f \u043f\u0440\u0438 \u0434\u0430\u043b\u044c\u043d\u0435\u0439\u0448\u0435\u0439 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0435 \u043f\u043e\u0434\u043e\u0431\u043d\u043e\u0433\u043e \u043f\u0443\u0442\u0438 \u0431\u0443\u0434\u0435\u0442 [&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-33388","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0435 PharStreamWrapper, \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0435\u0439 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 \u0434\u043b\u044f \u0437\u0430\u0449\u0438\u0442\u044b \u043e\u0442\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" 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