网络安全靶场
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Pass-04
丨本pass禁止上传
.php|.php5|.php4|.php3|.php2|php1|.html|.htm|.phtml|.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 后缀文件！
后端源码
$is_upload =false;$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！';}}
步骤
本关卡虽然禁止了大部分的扩展名，但是唯独没有禁止 htaccess，因此我们可以先上传一个htaccess配置文件。
“
1
先上传 一个 x.htaccess，用bp抓包再把名字改成 .htaccess，内容如下：
SetHandler application/x-httpd-php
它的作用是，将当前文件夹里任何文件都以php的方式解析。
“
2
上传任意文件名的php木马
例：上传一个shell.abc，可以被当做php脚本解析。
Pass-05
丨上传目录存在php文件（readme.php）
后端源码
$is_upload =false;$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！';}}
步骤
知识补充：.user.ini类似于.htaccess但是应用范围更广。
只要是以fastcgi运行的php都可以用它来动态的局部修改php.ini中的配置
“
1
上传一个文件 `.user.ini`，内容为
auto_prepend_file=a.jpg
它的作用为，当前目录下的所有php文件都会自动包含一个名为 a.jpg 的文件
“
2
上传一个名为 a.jpg 的图片马
“
3
访问 readme.php ，就会自动包含刚刚上传的图片马
Pass-06
丨本pass禁止上传
.php|.php5|.php4|.php3|.php2|php1|.html|.htm|.phtml|.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|.htaccess 后缀文件！
后端源码
$is_upload =false;$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！';}}
步骤
大小写绕过，上传 x.phP 即可
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END
原文始发于微信公众号（长风实验室）：靶场攻略 | upload-labs 靶场通关教程 Pass04-06
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