PHPCMS v9.6 Getshell方法大全

V9.6管理员权限getshell：
漏洞存在地址：ROOTDIR/phpsso_server/phpcms/modules/admin/system.php

public function uc() {
        if (isset($_POST['dosubmit'])) {
            $data = isset($_POST['data']) ? $_POST['data'] : '';
            $data['ucuse'] = isset($_POST['ucuse']) && intval($_POST['ucuse']) ? intval($_POST['ucuse']) : 0;
            $filepath = CACHE_PATH.'configs'.DIRECTORY_SEPARATOR.'system.php';
            $config = include $filepath;
            $uc_config = '<?php '."\ndefine('UC_CONNECT', 'mysql');\n";
            foreach ($data as $k => $v) {
                $old[] = "'$k'=>'".(isset($config[$k]) ? $config[$k] : $v)."',";
                $new[] = "'$k'=>'$v',";
                $uc_config .= "define('".strtoupper($k)."', '$v');\n";
            }
            $html = file_get_contents($filepath);
            $html = str_replace($old, $new, $html);
            $uc_config_filepath = CACHE_PATH.'configs'.DIRECTORY_SEPARATOR.'uc_config.php';
            @file_put_contents($uc_config_filepath, $uc_config);
            @file_put_contents($filepath, $html);
            $this->db->insert(array('name'=>'ucenter', 'data'=>array2string($data)), 1,1);
            showmessage(L('operation_success'), HTTP_REFERER);
        }
        $data = array();
        $r = $this->db->get_one(array('name'=>'ucenter'));
        if ($r) {
            $data = string2array($r['data']);
        }
        include $this->admin_tpl('system_uc');
    }

其中

$data = isset($_POST['data']) ? $_POST['data'] : '';

和

foreach ($data as $k => $v) {
$old[] = "'$k'=>'".(isset($config[$k]) ? $config[$k] : $v)."',";
$new[] = "'$k'=>'$v',";
$uc_config .= "define('".strtoupper($k)."', '$v');\n";
}

这里可以看到用post方式传递data中key，value并写入/phpsso_server/caches/configs/uc_config.php中

在ROOTDIR/phpcms/libs/classes/param.class.php中

public function __construct() {
if(!get_magic_quotes_gpc()) {
$_POST = new_addslashes($_POST);
$_GET = new_addslashes($_GET);
$_REQUEST = new_addslashes($_REQUEST);
$_COOKIE = new_addslashes($_COOKIE);
}

全局过滤POST 但这里之过滤value 没过滤key

接下来看步骤