Document Title:
===============
Microsoft Skype v8.34 Android - Authentication Bypass


References:
===========
https://www.vulnerability-lab.com/get_content.php?id=2178

Video: https://www.youtube.com/watch?v=2AUxh2M1EPg

Advisory: https://www.vulnerability-lab.com/get_content.php?id=2177



Release Date:
=============
2019-01-10


Vulnerability Laboratory ID (VL-ID):
====================================
2178


Common Vulnerability Scoring System:
====================================
6.3


Vulnerability Class:
====================
Authentication Bypass


Current Estimated Price:
========================
5.000€ - 10.000€


Vulnerability Disclosure Timeline:
==================================
2018-01-10: Public Disclosure (Vulnerability Laboratory)


Discovery Status:
=================
Published


Exploitation Technique:
=======================
Local


Severity Level:
===============
Medium


Authentication Type:
====================
Pre Auth (No Privileges or Session)


User Interaction:
=================
No User Interaction


Disclosure Type:
================
Independent Security Research


Technical Details & Description:
================================
The video explains a local authentication bypass vulnerability in the offical microsoft skype android consumer version.
The issue allows local attackers with physical device access to bypass the protection mechanism of the session approval.
Thus allows a local attacker with restricted access to a android device to bypass the authentication mechanism for unauthorized usage.


Credits & Authors:
==================
Florian Kunushevci [floriankunushevci@gmail.com] - https://www.vulnerability-lab.com/show.php?user=Florian+Kunushevci


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=========================
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