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upload-labs通关攻略(更新中)

php 服务器开发语言 Powered by 金山文档 2023-09-11 17:09:06 363人浏览泡泡鱼

摘要

1.靶场介绍 upload-labs是一个使用PHP语言编写，专注于文件上传漏洞的靶场。该靶场可以让练习者了解文件上传漏洞的原理、利用方法。 2.环境搭建 1.首先要下载phpstudy，解压安装 phpstudy下载链接：http

1.靶场介绍

upload-labs是一个使用PHP语言编写，专注于文件上传漏洞的靶场。该靶场可以让练习者了解文件上传漏洞的原理、利用方法。

2.环境搭建

1.首先要下载phpstudy，解压安装

phpstudy下载链接：https://www.xp.cn/download.html

2.下载upload-labs源代码

下载链接：https://codeload.github.com/c0ny1/upload-labs/zip/refs/heads/master

将压缩包解压后的文件名改为upload-labs，然后放入phpstudy\www目录下

3.打开phpstudy面板，启动Apache+Mysql

4.在浏览器中输入http://127.0.0.1/upload-labs/

就会打开一下界面，就安装成功了

Pass-01

任务是上传一个WEBshell到服务器

为了方便观察，这里我们选择上传，代码成功执行后显示PHP服务器的配置信息

尝试上传phpinfo.php，发现上传失败

我们点击显示源码或查看提示，发现这一关是使用javascript在客户端验证上传的文件类型

function checkFile() {    var file = document.getElementsByName('upload_file')[0].value;    if (file == null || file == "") {        alert("请选择要上传的文件!");        return false;    }    //定义允许上传的文件类型    var allow_ext = ".jpg|.png|.gif";    //提取上传文件的类型    var ext_name = file.substring(file.lastIndexOf("."));    //判断上传文件类型是否允许上传    if (allow_ext.indexOf(ext_name + "|") == -1) {        var errMsg = "该文件不允许上传，请上传" + allow_ext + "类型的文件,当前文件类型为：" + ext_name;        alert(errMsg);        return false;    }}

通关方法：

在浏览器中禁用JavaScript

firefox浏览器按f12调出开发者工具-->调试器-->设置-->禁用JavaScript，重新上传phpinfo.php就可以成功上传了。

在url中输入文件保存的路径

成功执行

Pass-02

点击显示源码跟查看提示可以看出，这一关是通过数据包中的MIME类型验证

$is_upload = false;$msg = null;if (isset($_POST['submit'])) {    if (file_exists(UPLOAD_PATH)) {        if (($_FILES['upload_file']['type'] == 'image/jpeg') || ($_FILES['upload_file']['type'] == 'image/png') || ($_FILES['upload_file']['type'] == 'image/gif')) {            $temp_file = $_FILES['upload_file']['tmp_name'];            $img_path = UPLOAD_PATH . '/' . $_FILES['upload_file']['name']                        if (move_uploaded_file($temp_file, $img_path)) {                $is_upload = true;            } else {                $msg = '上传出错！';            }        } else {            $msg = '文件类型不正确，请重新上传！';        }    } else {        $msg = UPLOAD_PATH.'文件夹不存在,请手工创建！';    }}

使用BurpSuite抓包

将Content-Type修改为允许上传的类型，（image/jpeg、image/png、image/gif）选其中一个修改，修改完后即可上传成功。

访问一下，成功执行

Pass-03

看一下源码，发现禁止后缀为'.asp','.aspx','.php','.jsp'的文件上传，属于黑名单验证。

$is_upload = false;$msg = null;if (isset($_POST['submit'])) {    if (file_exists(UPLOAD_PATH)) {        $deny_ext = array('.asp','.aspx','.php','.jsp');        $file_name = trim($_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        $file_ext = str_ireplace('::$DATA', '', $file_ext);//去除字符串::$DATA        $file_ext = trim($file_ext); //收尾去空        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 = '不允许上传.asp,.aspx,.php,.jsp后缀文件！';        }    } else {        $msg = UPLOAD_PATH . '文件夹不存在,请手工创建！';    }}

过关思路：这里黑名单定义不全，可以将后缀改为'.php5','.phtml','.pht'进行绕过。上传成功后可以直接连接，这里上传的文件名会改变成随机数字组合，不过返回的数据包中有回显，还是可以看到上传的文件名跟路径。

这里由于我环境的问题，操作没有成功。大家可以自行操作试一下

Pass-04

首先我们看一下源码，发现跟第三关一样，也是黑名单验证，只是限制的后缀更多了。

$is_upload = false;$msg = null;if (isset($_POST['submit'])) {    if (file_exists(UPLOAD_PATH)) {        $deny_ext = array(".php",".php5",".php4",".php3",".php2",".php1",".html",".htm",".phtml",".pht",".pHp",".pHp5",".pHp4",".pHp3",".pHp2",".pHp1",".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",".ini");        $file_name = trim($_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        $file_ext = str_ireplace('::$DATA', '', $file_ext);//去除字符串::$DATA        $file_ext = trim($file_ext); //收尾去空        if (!in_array($file_ext, $deny_ext)) {            $temp_file = $_FILES['upload_file']['tmp_name'];            $img_path = UPLOAD_PATH.'/'.$file_name;            if (move_uploaded_file($temp_file, $img_path)) {                $is_upload = true;            } else {                $msg = '上传出错！';            }        } else {            $msg = '此文件不允许上传!';        }    } else {        $msg = UPLOAD_PATH . '文件夹不存在,请手工创建！';    }}

这里还是因为我环境的问题，操作没有成功

过关思路：我们上传一个.htaccess后缀的文件（注意这里不能取文件名，就是.htaccess文件），文件内容为

SetHandler application/x-Httpd-php

然后下载一个图片，将图片名改为1.jpg（对应.htaccess文件内容），用Notepad打开图片，在图片内插入php代码，上传图片后，访问一下1.jpg，图片内的php代码就会被执行。

Pass-05

$is_upload = false;$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        $file_ext = str_ireplace('::$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'];            $img_path = UPLOAD_PATH.'/'.$file_name;            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！';    }}

过关思路：这一关虽然有对文件后缀名的过滤比较全，但是没有循环过滤，我们可以通过. .进行绕过上传。将文件名后缀改为.php. .这里的验证过程首先是过滤了文件末尾的点，将后缀名改为小写，去除后缀名中的::$DATA，最后再首尾去空。由于这里只过滤了一次，所以将.php. .被过滤成.php.还是可以绕过这里的黑名单验证，最后上传成功。

访问一下

成功通关

Pass-06

$is_upload = false;$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",".ini");        $file_name = trim($_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！';    }}

通过源代码可以看出，这一关没有对文件名转化为小写，直接将文件名改为phpinfo.PHP大写后缀即可上传成功。

Pass-07

这一关将后缀名转化为了小写，但是相对上一关少了一个首位去空的过滤。

我们这里抓包，在后缀名后面加一个空格，就可以绕过成功上传。

Pass-08

这一关通过源码可以看出少了一个删除末尾的'.'

$is_upload = false;$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",".ini");        $file_name = trim($_FILES['upload_file']['name']);        $file_ext = strrchr($file_name, '.');        $file_ext = strtolower($file_ext); //转换为小写        $file_ext = str_ireplace('::$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'];            $img_path = UPLOAD_PATH.'/'.$file_name;            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！';    }}

抓包在后缀名后加上一个'.'，就可以上传成功

成功过关

Pass-09

这一关在文件后缀名加上字符串::$DATA，就可以上传成功

访问一下

成功连接

Pass-10

这里第十关和第五关重复了，按照第五关的方法过就可以了。

Pass-11

这一关的验证是将黑名单中的后缀名过滤一遍，比如说上传.php文件，他就会过滤掉php，我们可以双写php，就可以绕过。

这里它只过滤了一遍php，过滤后还是有一个php，这样成功上传

Pass-12

12关跟13关都是利用%00截断来绕过验证，这里我因为环境问题没有成功。

过关思路：通过将恶意文件名的结尾添加一个%00空字节，来使服务器认为文件名的结尾已经到达，而忽略后面的任何内容。

使用%00截断需要三个条件：

1.php版本低于5.2.6（php5.2.6及之前的版本都存在%00截断漏洞，5.3.0后的版本修复了这个漏洞）

2.文件上传的路径可控

3.magic_quotes_gpc为OFF状态（在php.ini中设置）

Pass-14

function getReailFileType($filename){    $file = fopen($filename, "rb");    $bin = fread($file, 2); //只读2字节    fclose($file);    $strInfo = @unpack("C2chars", $bin);        $typeCode = intval($strInfo['chars1'].$strInfo['chars2']);        $fileType = '';        switch($typeCode){              case 255216:                        $fileType = 'jpg';            break;        case 13780:                        $fileType = 'png';            break;                case 7173:                        $fileType = 'gif';            break;        default:                        $fileType = 'unknown';        }            return $fileType;}$is_upload = false;$msg = null;if(isset($_POST['submit'])){    $temp_file = $_FILES['upload_file']['tmp_name'];    $file_type = getReailFileType($temp_file);    if($file_type == 'unknown'){        $msg = "文件未知，上传失败！";    }else{        $img_path = UPLOAD_PATH."/".rand(10, 99).date("YmdHis").".".$file_type;        if(move_uploaded_file($temp_file,$img_path)){            $is_upload = true;        } else {            $msg = "上传出错！";        }    }}

这一关通过提示可以知道这里有文件包含漏洞

直接制作图片马配合文件包含漏洞就可以过关了

图片马制作方法：

提前准备好一张图片跟一个一句话木马，打开cmd命令行输入“copy 1.png/b + 1.php 3.png”，生成3.png图片马。

用Notepad打开图片，在内容中写入一句话木马。

上传制作好的图片马后，配合文件包含漏洞直接访问上传的文件

成功过关

Pass-15

function isImage($filename){    $types = '.jpeg|.png|.gif';    if(file_exists($filename)){        $info = getimagesize($filename);        $ext = image_type_to_extension($info[2]);        if(stripos($types,$ext)>=0){            return $ext;        }else{            return false;        }    }else{        return false;    }}$is_upload = false;$msg = null;if(isset($_POST['submit'])){    $temp_file = $_FILES['upload_file']['tmp_name'];    $res = isImage($temp_file);    if(!$res){        $msg = "文件未知，上传失败！";    }else{        $img_path = UPLOAD_PATH."/".rand(10, 99).date("YmdHis").$res;        if(move_uploaded_file($temp_file,$img_path)){            $is_upload = true;        } else {            $msg = "上传出错！";        }    }}

这一关我们看一下源码，这里是用getimagesize函数来验证接受的文件是否为图片信息，跟上一关的过关方法一样，制作图片马上传，配合文件包含漏洞就可以了