upload-labs靶场-Pass-08关-思路以及过程

在开始之前，我们需要做一些准备工作。

upload-labs靶场是在PHP环境下运行的，因此我准备了一个PHP脚本和一张图片。图片很容易准备，如果你不想自己编写PHP脚本，可以使用我提供的这个获取当前时间的PHP脚本。

代码语言：PHP 运行次数：0

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注意：图片默认不清晰，请放大查看！

Pass-08

代码：

代码语言：PHP 运行次数：0

$is_upload = false;
$msg = null;
if (isset($_POST['submit'])) {
    if (file_exists(UPLOAD_PATH)) {
        $deny_ext = array(".php",".php5",".php4",".php3",".php2",".html",".htm",".phtml",".pht",".pHp",".pHp5",".pHp4",".pHp3",".pHp2",".Html",".Htm",".pHtml",".jsp",".jspa",".jspx",".jsw",".jsv",".jspf",".jtml",".jSp",".jSpx",".jSpa",".jSw",".jSv",".jSpf",".jHtml",".asp",".aspx",".asa",".asax",".ascx",".ashx",".asmx",".cer",".aSp",".aSpx",".aSa",".aSax",".aScx",".aShx",".aSmx",".cEr",".sWf",".swf",".htaccess");
        $file_name = trim($_FILES['upload_file']['name']);
        $file_name = deldot($file_name); // 删除文件名末尾的点
        $file_ext = strrchr($file_name, '.');
        $file_ext = strtolower($file_ext); // 转换为小写
        $file_ext = trim($file_ext); // 首尾去空

        if (!in_array($file_ext, $deny_ext)) {
            $temp_file = $_FILES['upload_file']['tmp_name'];
            $img_path = UPLOAD_PATH.'/'.date("YmdHis").rand(1000,9999).$file_ext;
            if (move_uploaded_file($temp_file, $img_path)) {
                $is_upload = true;
            } else {
                $msg = '上传出错！';
            }
        } else {
            $msg = '此文件类型不允许上传！';
        }
    } else {
        $msg = UPLOAD_PATH . '文件夹不存在,请手工创建！';
    }
}

这关之前的方法基本上是行不通的。

通关过程：这一关实际上是利用了Windows系统的一个命名特性。在Windows系统中，如果文件名后面加上"

::$DATA

::$DATA

::$DATA

举个例子：

上传文件名为：

测试.php::$DATA

::$DATA

测试.php

xxx.php

通关完成！