环境要求
若要自己亲自搭建环境，请按照以下配置环境，方可正常运行每个 Pass。
配置项 | 配置 | 描述 |
|---|---|---|
操作系统 | Window or Linux | 推荐使用 Windows，除了 Pass-19 必须在 linux 下，其余 Pass 都可以在 Windows 上运行 |
PHP 版本 | 推荐 5.2.17 | 其他版本可能会导致部分 Pass 无法突破 |
PHP 组件 | php_gd2,php_exif | 部分 Pass 依赖这两个组件 |
中间件 | 设置 Apache | 以 moudel 方式连接 |
第六关
源码解读
代码语言：javascript复制$is_upload = false;
$msg = null;
if (isset($_POST['submit'])) {
if (file_exists($UPLOAD_ADDR)) {
$deny_ext = array(".php",".php5",".php4",".php3",".php2",".html",".htm",".phtml",".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
if (!in_array($file_ext, $deny_ext)) {
if (move_uploaded_file($_FILES['upload_file']['tmp_name'], $UPLOAD_ADDR . '/' . $_FILES['upload_file']['name'])) {
$img_path = $UPLOAD_ADDR . '/' . $file_name;
$is_upload = true;
}
} else {
$msg = '此文件不允许上传';
}
} else {
$msg = $UPLOAD_ADDR . '文件夹不存在,请手工创建！';
}
}- PHP $_FILES 是一个预定义的数组，用来获取通过 POST 方法上传文件的相关信息。如果为单个文件上传，那么
_FILES 为三维数组
代码语言：javascript复制Array
(
[userfile] => Array
(
[name] => Screen Shot 2016-05-12 at 18.13.24.png
[type] => image/png
[tmp_name] => /private/var/tmp/phplVHp3W
[error] => 0
[size] => 344925
)
)- 是后缀名黑名单，少了这段代码
file_ext); //首尾去空
bypass
可以进行空格绕过，直接抓包修改文件名，再文件名末尾添加空格，成功上传
- 直接可上传 php 文件成功
第七关
源码解读
代码语言：javascript复制$is_upload = false;
$msg = null;
if (isset($_POST['submit'])) {
if (file_exists($UPLOAD_ADDR)) {
$deny_ext = array(".php",".php5",".php4",".php3",".php2",".html",".htm",".phtml",".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, $deny_ext)) {
if (move_uploaded_file($_FILES['upload_file']['tmp_name'], $UPLOAD_ADDR . '/' . $_FILES['upload_file']['name'])) {
$img_path = $UPLOAD_ADDR . '/' . $file_name;
$is_upload = true;
}
} else {
$msg = '此文件不允许上传';
}
} else {
$msg = $UPLOAD_ADDR . '文件夹不存在,请手工创建！';
}
}- 没有对后缀名进行去”.”处理，只是截取.后面的后缀名。利用windows特性，会自动去掉后缀名中最后的”.”，可在后缀名中加”.”绕过。少了代码 deldot(file_name);//删除文件名末尾的点
bypass
查看源码还是黑名单没有对后缀名进行去.操作利用 Windows 特性会自动去掉后缀名中最后的.可在后缀名中加 . 绕过
第八关
源码解读
代码语言：javascript复制$is_upload = false;
$msg = null;
if (isset($_POST['submit'])) {
if (file_exists($UPLOAD_ADDR)) {
$deny_ext = array(".php",".php5",".php4",".php3",".php2",".html",".htm",".phtml",".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, $deny_ext)) {
if (move_uploaded_file($_FILES['upload_file']['tmp_name'], $UPLOAD_ADDR . '/' . $_FILES['upload_file']['name'])) {
$img_path = $UPLOAD_ADDR . '/' . $file_name;
$is_upload = true;
}
} else {
$msg = '此文件不允许上传';
}
} else {
$msg = $UPLOAD_ADDR . '文件夹不存在,请手工创建！';
}
}
- 逻辑大致是识别上传文件的类型 并查看是否是'.asp','.aspx','.php','.jsp'中的一个，否则不允许上传，少了代码 $file_ext = str_ireplace('::DATA', '', file_ext);//去除字符串
bypass
- NTFS 文件系统包括对备用数据流的支持，主要包括提供与 Macintosh 文件系统中的文件的兼容性。备用数据流允许文件包含多个数据流。每个文件至少有一个数据流。在 Windows 中，此默认数据流称为：
DATA 绕过。(仅限 windows)
第九关
源码解读
代码语言：javascript复制 $is_upload = false;
$msg = null;
if (isset($_POST['submit'])) {
if (file_exists($UPLOAD_ADDR)) {
$deny_ext = array(".php",".php5",".php4",".php3",".php2",".html",".htm",".phtml",".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, $deny_ext)) {
if (move_uploaded_file($_FILES['upload_file']['tmp_name'], $UPLOAD_ADDR . '/' . $_FILES['upload_file']['name'])) {
$img_path = $UPLOAD_ADDR . '/' . $file_name;
$is_upload = true;
}
} else {
$msg = '此文件不允许上传';
}
} else {
$msg = $UPLOAD_ADDR . '文件夹不存在,请手工创建！';
}
}- 查看源码，这里只过滤了一次，所以直接构造 .php. . 绕过
bypass
直接构造点加空格加点 .php. . 绕过
可通过https://localhost/upload-labs/upload/shell1.php访问mm
第十关
源码解读
代码语言：javascript复制$is_upload = false;
$msg = null;
if (isset($_POST['submit'])) {
if (file_exists($UPLOAD_ADDR)) {
$deny_ext = array("php","php5","php4","php3","php2","html","htm","phtml","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,"", $file_name);
if (move_uploaded_file($_FILES['upload_file']['tmp_name'], $UPLOAD_ADDR . '/' . $file_name)) {
$img_path = $UPLOAD_ADDR . '/' .$file_name;
$is_upload = true;
}
} else {
$msg = $UPLOAD_ADDR . '文件夹不存在,请手工创建！';
}
}- file_name = str_ireplace($deny_ext,"", file_name)将符合后缀名进行替换
bypass
1.双写绕过
