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Category:   Application (Generic)  >   Web Wiz Rich Text Editor Vendors:   Web Wiz Guide
Web Wiz Rich Text Editor Input Validation Flaw Lets Remote Users Traverse the Directory and Create HTML Files
SecurityTracker Alert ID:  1019267
SecurityTracker URL:  http://securitytracker.com/id/1019267
CVE Reference:   CVE-2008-0466, CVE-2008-0473, CVE-2008-0481   (Links to External Site)
Updated:  Feb 1 2008
Original Entry Date:  Jan 25 2008
Impact:   Disclosure of system information, Disclosure of user information, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 4.0
Description:   AmnPardaz Security Research Team reported a vulnerability in Web Wiz Rich Text Editor. A remote user can view files on the target system. A remote user can create HTML files on the target system.

The 'RTE_file_browser.asp' script does not properly validate user-supplied input. A remote user can supply a specially crafted request to view files on target system that are located outside of the intended directory.

A demonstration exploit URL is provided:

http://[target]/RTE_file_browser.asp?look=save&sub=\.....\\\.....\\\.....\\\.....\\\.....\\\

A remote user can also exploit the 'RTE_popup_save_file.asp' script to create HTML files on the target system.

The original advisory is available at:

http://www.bugreport.ir/?/31

Impact:   A remote user can view files on the target system.

A remote user can create HTML files on the target system.

Solution:   The vendor has issued a fixed version (4.01).
Vendor URL:  www.webwizguide.com/webwizrichtexteditor/ (Links to External Site)
Cause:   Access control error, Input validation error
Underlying OS:  Windows (Any)

Message History:   None.


 Source Message Contents

Subject:  Web Wiz Rich Text Editor Directory traversal + HTM/HTML file

########################## WwW.BugReport.ir  
###########################################
#
#      AmnPardaz Security Research Team
#
# Title: Web Wiz Rich Text Editor(TM)
# Vendor: http://www.webwizguide.com/
# Bug: Directory traversal + HTM/HTML file creation on the server
# Vulnerable Version: 4.0
# Exploit: Available
# Fix Available: No! Fast Solution is available.
###################################################################################


####################
- Description:
####################
Web Wiz Rich Text Editor (RTE) is a free WYSIWYG HTML Rich Text Editor  
that replaces standard textarea's with an advanced Word style HTMLarea.

####################
- Vulnerability:
####################
Input passed to the FolderName parameter in "RTE_file_browser.asp" is  
not properly sanitised before being used. This can be exploited to  
list directories, list txt and list zip files through directory  
traversal attacks.
Also, "RTE_file_browser.asp" does not check user's session and an  
unauthenticated attacker can perform this attack.
Moreover, by using "RTE_popup_save_file.asp" attacker can make his/her  
HTML or HTM file on the server, so this can be used in XSS attacks or  
making fake pages.

-POC:
http://[WebWiz  
RTE]/RTE_file_browser.asp?look=save&sub=\.....\\\.....\\\.....\\\.....\\\.....\\\
http://[WebWiz RTE]/RTE_popup_save_file.asp

####################
- Fast Solution :
####################
1- You can see below lines in "RTE_file_browser.asp"

	'Stip path tampering for security reasons
	strSubFolderName = Replace(strSubFolderName, "../", "", 1, -1, 1)
	strSubFolderName = Replace(strSubFolderName, "..\", "", 1, -1, 1)
	strSubFolderName = Replace(strSubFolderName, "./", "", 1, -1, 1)
	strSubFolderName = Replace(strSubFolderName, ".\", "", 1, -1, 1)

Only add this to them:
	strSubFolderName = Replace(strSubFolderName, "/", "\", 1, -1, 1)
	strSubFolderName = Replace(strSubFolderName, "\\", "\", 1, -1, 1)
	strSubFolderName = Replace(strSubFolderName, "..", "", 1, -1, 1)
2- Rename "RTE_popup_save_file.asp" till main solution by vendor

####################
- Credit :
####################
Original Advisory: http://www.bugreport.ir/?/31
AmnPardaz Security Research & Penetration Testing Group
Contact: admin[4t}bugreport{d0t]ir
WwW.BugReport.ir
WwW.AmnPardaz.com




 
 


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