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Thru Managed File Transfer Portal 9.0.2 Cross Site Scripting

Thru Managed File Transfer Portal 9.0.2 Cross Site Scripting
Posted Feb 19, 2016
Authored by Dr. Erlijn van Genuchten | Site syss.de

Thru Managed File Transfer Portal version 9.0.2 suffers from a cross site scripting vulnerability.

tags | exploit, xss
SHA-256 | e0c6c0e9ba1dfbb79a77ae2d57381ec098b0846532313373f1f0ef0c0886b5c6

Thru Managed File Transfer Portal 9.0.2 Cross Site Scripting

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Hash: SHA512

Advisory ID: SYSS-2015-057
Product: Thru Managed File Transfer Portal
Manufacturer: Thru
Affected Version(s): 9.0.2
Tested Version(s): 9.0.2
Vulnerability Type: Cross-Site Scripting (CWE-79)
Risk Level: Medium
Solution Status: Open
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)

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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 is vulnerable to HTML
injection attacks. This allows users to send e-mails with malicious
content to another user in the context of a trustworthy Thru e-mail.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Vulnerability Details:

The SySS GmbH identified a vulnerability in the "file upload"
functionality for unauthenticated users. Here, it is possible to add a
message that accompanies the uploaded file. A notification e-mail is sent
to the receiving user, including this message.

The described cross-site scripting vulnerability allows an attacker
to send an e-mail to the victim with malicious content, for example a
download link to a page owned by the attacker, in the context of a
trustworthy Thru e-mail.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Proof of Concept (PoC):

The following HTTP POST request using the HTML code
<a href="[URL-EVIL-PAGE]">Click here</a> to download your file." as the
value for the parameter "uploadmessage" demonstrates that HTML code can
be injected:

POST /EmailCheck.aspx HTTP/1.1
Host: [HOST]
Referer: https://[host]/Desktop/Dropbox/Create/?
Content-Length: [content length]
Cookie: [COOKIES]

email=[e-mail]&ccEmails=&subjectemail=subject&uploadmessage%3d<a+href%3d"[url-to-evil-page]">Click+here</a>+to+download+your+file.&captcha=DropboxCreateCaptcha&captchaValue=4TH5C&captchaInstanceId=98ba49a8d3e94afe80a0e0dbf6df3e12&uploadprivatemessage=

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Solution:

The reported security vulnerability has been fixed in a new software
release. Update to the new software version.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Disclosure Timeline:

2015-10-23: Vulnerability discovered
2015-10-28: Vulnerability reported to manufacturer
2016-01-22: Manufacturer announced update
2016-02-15: Public release of security advisory

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

References:

[1] Thru Homepage
http://www.thruinc.com
[2] SySS Security Advisory SYSS-2015-057
https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2015-057.txt
[3] SySS Responsible Disclosure Policy
https://www.syss.de/en/news/responsible-disclosure-policy/

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Copyright:

Creative Commons - Attribution (by) - Version 3.0
URL: http://creativecommons.org/licenses/by/3.0/deed.en
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