KBVault MySQL 0.16a - Arbitrary File Upload

EDB-ID: 42184
Author: Fatih Emiral
Published: 2017-06-14
CVE: CVE-2017-9602
Type: Webapps
Platform: ASPX
Vulnerable App: Download Vulnerable Application

 # Google Dork: [inurl:"FileExplorer/Explorer.aspx"] 
# Date: [2017-06-14]
# Exploit Author: [Fatih Emiral]
# Vendor Homepage: [http://kbvaultmysql.codeplex.com/]
# Software Link: [http://kbvaultmysql.codeplex.com/downloads/get/858806]
# Version: [0.16a]
# Tested on: [Windows 7 (applicable to all Windows platforms)]
# CVE : [CVE-2017-9602]

1. Description

KBVault Mysql Free Knowledge Base application package comes with a third party file management component. An unauthenticated user can access the file upload (and delete) functionality using the following URI:

http://host/FileExplorer/Explorer.aspx?id=/Uploads

2. Exploit

Through this functionality a user can upload an ASPX script to run any arbitrary code, e.g.:

http://host/Uploads/Documents/cmd.aspx

3. Solution

Unauthenticated access to the file management function should be prohibited.
File uploads should be checked against executable formats, and only acceptable file types should be allowed to upload.

4. Disclosure Timeline

2017-06-09: Vendor notification
2017-06-09: Vendor responded with intention to fix the vulnerability
2017-06-12: CVE number acquired
2017-06-15: Public disclosure

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