Huawei Flybox B660 3G/4G Router - Auth Bypass Vulnerability

[Vulnerability Lab <research () vulnerability-lab com>]

Document Title:
===============
Huawei Flybox B660 3G/4G Router - Auth Bypass Vulnerability


References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=2010

Huawei ID: 558969357627813


Release Date:
=============
2016-11-18


Vulnerability Laboratory ID (VL-ID):
====================================
2010


Common Vulnerability Scoring System:
====================================
7.4


Product & Service Introduction:
===============================
The Huawei B660 has a web interface for configuration. You can use any web browser you like to login to the Huawei B660.

(Copy of the Homepage: http://setuprouter.com/router/huawei/b660/manual-1184.pdf )


Abstract Advisory Information:
==============================
The vulnerability laboratory core research team discovered a security flaw that affects the official Huawei Flybox B660 
3g/4g router product series.


Vulnerability Disclosure Timeline:
==================================
2016-11-18:     Public Disclosure (Vulnerability Laboratory)


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


Affected Product(s):
====================
Huawei
Product: Flybox - Router (Web-Application) B660 3G/4G


Exploitation Technique:
=======================
Remote


Severity Level:
===============
Critical


Technical Details & Description:
================================
A remote auth bypass vulnerability has been discovered in the official Huawei Flybox B660 3g/4g router product series.
The security vulnerability allows remote attackers to compromise any Huawei Flybox B660 
Admin Panel using a new a bypass method.

The vulnerability is located in the `./htmlcode/html/` modules and `indexdefault.asp ` file of 
localhost path URL. Remote attackers are able to compromise any Huawei Flybox B660  admin panel
via unauthenticated GET method request. 

The security risk of the issue is estimated as critical with a cvss count of 7.4. (CVSS 7.4)
Exploitation of the web vulnerability requires no privileged account or user interaction. 
Successful exploitation of the vulnerability results in compromise of the huawei flybox device.

Request Method(s):
[+] GET

Vulnerable Module(s):
[+] /htmlcode/html/

Vulnerable File(s):
[+] indexdefault.asp


Software version of the modem:
1066.12.15.01.200

Hardware version of the modem:
WLB3TCLU

Name of the device:
B660

Hardware version of the router:
WL1B660I001

Software version of the router:
1066.11.15.02.110sp01


Proof of Concept (PoC):
=======================
The vulnerability can be exploited by remote attackers without privileged user account or user interaction.
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to 
continue.

After buying a Flybox Huawei B660, the company setup a password for you like: "admin", "12345" or "55555"
We figured out that when you lose your password, you can perform to connect multiple times by using the plain passwords 
above.
After the third request the connection will be refused by an exception message, by intercepting the request and passing 
the error 
it is possible to bypass the authentication mechanism of the 3g/4g router device. The problem in Flybox Huawei B660 is 
the following, 
there is no test if the password false or true. If an attacker tries the false password of many times on requests they 
redirect you 
after the bypass of the error to change your password permanently.


--- PoC Session Logs [GET] ---
GET /htmlcode/html/contentdefault.asp HTTP/1.1
Host: localhost
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Encoding: gzip, deflate, lzma, sdch
Accept-Language: en-US,en;q=0.8
Cookie: login_url=settings; CNZZDATA1260483764=1049902387-1478277586-%7C1478277586; Basic=index; Language=en; 
SessionID_R3=1006428909
Referer: http://localhost/htmlcode/html/content.asp
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.59 Safari/537.36 
OPR/41.0.2353.46
HTTP/1.1 200 OK
CACHE-CONTROL: no-cache
Content-Length: 5776
Content-Type: text/html


PoC Video: https://www.youtube.com/watch?v=-xzedPTNv6c 


Solution - Fix & Patch:
=======================
N/A


Security Risk:
==============
The security risk of the remote vulnerability in the Huawei Flybox B660 3G74G router is estimated as critical. (CVSS 
7.4)



Credits & Authors:
==================
SaifAllah benMassaoud - ( http://www.vulnerability-lab.com/show.php?user=SaifAllahbenMassaoud )



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