Thru Managed File Transfer Portal 9.0.2 Insecure Direct Object Reference

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Advisory ID: SYSS-2015-059  
Product: Thru Managed File Transfer Portal   
Manufacturer: Thru  
Affected Version(s): 9.0.2  
Tested Version(s): 9.0.2  
Vulnerability Type: Insecure Direct Object Reference (CWE-932)  
Risk Level: Medium  
Solution Status: Fixed  
Manufacturer Notification: 2015-10-28  
Solution Date: 2016-01-22  
Public Disclosure: 2016-02-15  
CVE Reference: Not yet assigned  
Author of Advisory: Dr. Erlijn van Genuchten (SySS GmbH)  
  
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Overview:  
  
Thru Managed File Transfer Portal is a web based file transfer application.   
According to the Thru website [1], the application aims to offload large   
file transfer to a single platform, to protect files, to replace FTP   
servers and to allow access to files anytime, anywhere.  
  
The Thru Managed File Transfer application allows unauthenticated users   
to use the upload functionality that was loaded during an authenticated   
session.  
  
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Vulnerability Details:  
  
The SySS GmbH identified a vulnerability in the file upload functionality.   
If this page was loaded during an authenticated session, the page could   
still be rendered and used to upload a file after successfully logging  
out.  
  
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Proof of Concept (PoC):  
  
The vulnerable page was found under the URL:  
  
https://[HOST]/App/BrowserUpload.aspx?folderid=[MYDOCUMENTS-FOLDER-ID]  
  
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Solution:  
  
The reported security vulnerability has been fixed in a new software  
release. Update to the new software version.  
  
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Disclosure Timeline:  
  
2015-10-26: Vulnerability discovered  
2015-10-28: Vulnerability reported to manufacturer  
2016-01-22: Manufacturer announced update  
2016-02-15: Public release of security advisory  
2016-03-02: Public release of revised security advisory (corrected   
solution status)  
  
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References:  
  
[1] Thru Homepage  
http://www.thruinc.com  
[2] SySS Security Advisory SYSS-2015-059  
https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2015-059.txt  
[3] SySS Responsible Disclosure Policy  
https://www.syss.de/en/news/responsible-disclosure-policy/  
  
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Credits:  
  
This security vulnerability was found by Dr. Erlijn van Genuchten of the  
SySS GmbH.  
  
E-Mail: [email protected]  
Public Key: https://www.syss.de/fileadmin/dokumente/Materialien/PGPKeys/Erlijn_vanGenuchten.asc  
Key ID: 0xBD96FF2A  
Key Fingerprint: 17BB 4CED 755A CBB3 2D47 C563 0CA5 8637 BD96 FF2A  
  
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Disclaimer:  
  
The information provided in this security advisory is provided "as is"   
and without warranty of any kind. Details of this security advisory may  
be updated in order to provide as accurate information as possible. The  
latest version of this security advisory is available on the SySS Web  
site.  
  
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Copyright:  
  
Creative Commons - Attribution (by) - Version 3.0  
URL: http://creativecommons.org/licenses/by/3.0/deed.en  
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