Web

[极客大挑战 2019]EasySQL admin' or 1=1# [极客大挑战 2019]Havefun f12看源码 <!-- $cat=$_GET['cat']; echo $cat; if($cat=='dog'){ echo 'Syc{cat_cat_cat_cat}'; } --> /?cat=dog [HCTF 2018]WarmUp 看源码 <!--source.php--> <?php highlight_file(__FILE__); class emmm { public static function checkFile(&$page) { $whitelist = ["source"=>"source.php","hint"=>"hint.php"]; if (! isset($page) || !is_string($page)) { echo "you can't see it"; return false; } if (in_array($page, $whitelist)) { return true; } $_page = mb_substr( $page, 0, mb_strpos($page . '?', '?') ); if (in_array($_page, $whitelist)) { return true; } $_page = urldecode($page); $_page = mb_substr( $_page, 0, mb_strpos($_page . '?', '?') ); if (in_array($_page, $whitelist)) { return true; } echo "you can't see it"; return false; } } if (! empty($_REQUEST['file']) && is_string($_REQUEST['file']) && emmm::checkFile($_REQUEST['file']) ) { include $_REQUEST['file']; exit; } else { echo "<br><img src=\"https://i.loli.net/2018/11/01/5bdb0d93dc794.jpg\" />"; } ?> hint.php ...