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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: erlijn.vangenuchten@syss.de
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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