bugtraq - SEC Consult SA-20160422-0 :: Insecure credential storage in my devolo Android app

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Date: Fri, 22 Apr 2016 12:32:57 +0200
From: SEC Consult Vulnerability Lab <research@...-consult.com>
To: <bugtraq@...urityfocus.com>, <fulldisclosure@...lists.org>
Subject: SEC Consult SA-20160422-0 :: Insecure credential storage in my devolo
 Android app

SEC Consult Vulnerability Lab Security Advisory < 20160422-0 >
=======================================================================
              title: Insecure data storage
            product: my devolo - android application - air.de.devolo.my.devolo
 vulnerable version: 1.2.8
      fixed version:
         CVE number:
             impact: High
           homepage: http://www.devolo.com/
              found: 2015-10-30
                 by: A. Nochvay (Office Moscow)
                     SEC Consult Vulnerability Lab

                     An integrated part of SEC Consult
                     Berlin - Frankfurt/Main - Montreal - Moscow
                     Singapore - Vienna (HQ) - Vilnius - Zurich

                     https://www.sec-consult.com

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

Vendor description:
-------------------
devolo AG has been developing innovative Powerline and data communications
products for private customers and professional users.devolo Home Control
expands on the idea of the easy way to connect and is emerging as a new
product world for the smart home that simply enables greater comfort and
convenience, security and energy savings.

URL: http://www.devolo.com/en/Company/devolo-AG


Business recommendation:
------------------------
Attackers might be able to recover sensitive information from stolen/lost devices.
With this information attackers can control user's smart devices, change
temperature and watching user's remote camera.

SEC Consult recommends not to store sensitive information on mobile devices.


Vulnerability overview/description:
-----------------------------------
The application "my devolo" uses the SharedPreferences android mechanism for
storing information about the user including login credentials for the site
mydevolo.com. In the event that an adversary physically attains the mobile
device, the adversary might be able to hook up the mobile device to a computer
with freely available software. These tools allow the adversary to see all third
party application directories.


Proof of concept:
-----------------
Has been removed due to the request from the vendor.


Vulnerable / tested versions:
-----------------------------
The vulnerability has been discovered in "my devolo" version 1.2.8, which
is the latest version in Google Play Store at this time.


Vendor contact timeline:
------------------------
2015-11-10: Transmission of advisory via a data-exchange platform provided by
the vendor
2016-02-23: Confirmation of the described issue via email by vendor
2016-04-22: Public advisory release


Solution:
---------
no solution available


Workaround:
-----------
no workaround available


Advisory URL:
-------------
https://www.sec-consult.com/en/Vulnerability-Lab/Advisories.htm


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

SEC Consult Vulnerability Lab

SEC Consult
Berlin - Frankfurt/Main - Montreal - Moscow
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.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Contact our local offices https://www.sec-consult.com/en/About/Contact.htm
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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EOF Aleksandr Nochvay / @2015



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