Huawei SafeBox Manager 6.30.057.L - Bypass Vulnerability

Document Title:
===============
Huawei SafeBox Manager 6.30.057.L - Bypass Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1789


Release Date:
=============
2018-07-18


Vulnerability Laboratory ID (VL-ID):
====================================
1789


Common Vulnerability Scoring System:
====================================
4.9


Vulnerability Class:
====================
Insufficient Session Validation


Current Estimated Price:
========================
500€ - 1.000€


Product & Service Introduction:
===============================
Huawei Technologies Co. Ltd.  is a Chinese multinational networking and telecommunications equipment and services company headquartered 
in Shenzhen, Guangdong. It is the largest telecommunications equipment manufacturer in the world, having overtaken Ericsson in 2012.
Huawei was founded in 1987 by Ren Zhengfei, a former engineer in the Peoplegovernment-labs Liberation Army. At the time of its establishment 
Huawei was focused on manufacturing phone switches, but has since expanded its business to include building telecommunications networks; providing 
operational and consulting services and equipment to enterprises inside and outside of China; and manufacturing communications devices for the 
consumer market. Huawei has over 170,000 employees as of September 2015, around 76,000 of whom are engaged in research and development (R&D). 
It has 21 R&D institutes in countries including China, the United States,Canada,the United Kingdom, Pakistan, France, Belgium, Germany, Colombia, 
Sweden, Ireland, India, Russia, and Turkey, and in 2013 invested US$5 billion in R&D,increased to $6.4bn in 2014.

(COpy of the Homepage: http://www.huawei.com/en/ )


Abstract Advisory Information:
==============================
The vulnerability laboratory research team discovered reset bypass vulnerability in the official Huawei File Safebox Manger android mobile software.


Vulnerability Disclosure Timeline:
==================================
2018-07-18: Public Disclosure (Vulnerability Laboratory)


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


Affected Product(s):
====================
Huawei
Product: Huawei Files  - Safebox Manager (Android) 6.30.057.L


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


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


Authentication Type:
====================
Restricted authentication (user/moderator) - User privileges


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


Disclosure Type:
================
Responsible Disclosure Program


Technical Details & Description:
================================
A reset bypass vulnerability has been discovered in the official Huawei File Safebox Manger android mobile software.
The vulnerability allows to bypass the secure file manager privileges to access the sensitive device information or files.

Attackers are able to reset the password of file manager protected area for private files by copying the modified file and 
replace it with current one. The vulnerability is located in the application folder `File_SafeBox  government-lab name of - 
Safebox government-lab`. Considering as it affects the file called `msb.db` which is storing the password inside. By replacing 
the file with modified version, thus will reset the password successfully. Deleting it leads to losing data also with no way 
to recover the information.

The security risk of the reset bypass web vulnerability is estimated as medium with a cvss (common vulnerability scoring system) count of 4.9. 
Exploitation of the vulnerability requires no user interaction but a local low privileged huawei application user account with physical device access. 
Successful exploitation of the vulnerability results leak of sensitive information and huawei mobile data storage compromise. 

Vulnerable File(s):
[+] msb.db  


Proof of Concept (PoC):
=======================
The vulnerability can be reproduced by local attackers with low privileged device user account, physical device access and without user interaction.
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue.


Manual steps to reproduce the vulnerability ...
1. Go to the File_SafeBox folder located in internal storage using the file manager 
2. Copy the modified msb.db into File_SafeBox > name of SAFEBOX normaly it is a hash name 
3. Replace it and then end process called "Files" 
4. The password reset successfully performed! 
5. Local attackers are able to get access to the backup by usage of the new password
6. Successful reproduce of the local vulnerability! access into it using the new password . 


PoC: (Video)
https://www.youtube.com/watch?v=gN3QTugpmwM


Solution - Fix & Patch:
=======================
Since this issue is local one, the fix can be made by disallowing to save configuration file in public directory and find another way 
to save password of huawei safebox manager. 


Security Risk:
==============
The security risk of the local reset bypass vulnerability in the android software of huawei is estimated as medium.


Credits & Authors:
==================
Vulnerability-Lab [[email protected]] - https://www.vulnerability-lab.com/show.php?user=Vulnerability-Lab


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