Huawei Technologies du Mobile Broadband 16.0 Local Privilege Escalation

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Huawei Technologies du Mobile Broadband 16.0 Local Privilege Escalation  
  
  
Vendor: Huawei Technologies Co., Ltd.  
Product Web Page: http://www.huawei.com  
Affected version: 16.002.03.16.124  
  
Summary: du Mobile Broadband is a shareware application for  
du EITC UAE users to support mobile broadband (3G) activation  
for du service provider with systems containing one of the  
supported devices. It lets you access du wireless internet  
wherever you are and whenever you need it, all powered through  
your mobile data SIM or simply by connecting your 3G USB stick  
to your device.  
  
Desc: The application is vulnerable to an elevation of privileges  
vulnerability which can be used by a simple user that can change  
the executable file with a binary of choice. The vulnerability  
exist due to the improper permissions, with the 'F' flag (full)  
for the 'Everyone' and 'Users' group, for the 'du Mobile Broadband.exe'  
binary file. The files are installed in the 'du Mobile Broadband'  
directory which has the Everyone group assigned to it with full  
permissions making every single file inside vulnerable to change  
by any user on the affected machine. After you replace the binary  
with your rootkit, on reboot you get SYSTEM privileges.  
  
Tested on: Microsoft Windows 7 Ultimate (EN) 64bit  
  
  
Vulnerability discovered by Gjoko 'LiquidWorm' Krstic  
@zeroscience  
  
  
Advisory ID: ZSL-2013-5164  
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5164.php  
  
  
  
18.12.2013  
  
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C:\Program Files (x86)>cacls "du Mobile Broadband"  
C:\Program Files (x86)\du Mobile Broadband Everyone:(OI)(CI)F  
BUILTIN\Users:(OI)(IO)F  
BUILTIN\Users:(CI)F  
NT SERVICE\TrustedInstaller:(ID)F  
NT SERVICE\TrustedInstaller:(CI)(IO)(ID)F  
NT AUTHORITY\SYSTEM:(ID)F  
NT AUTHORITY\SYSTEM:(OI)(CI)(IO)(ID)F  
BUILTIN\Administrators:(ID)F  
BUILTIN\Administrators:(OI)(CI)(IO)(ID)F  
CREATOR OWNER:(OI)(CI)(IO)(ID)F  
  
  
C:\Program Files (x86)>cd "du Mobile Broadband"  
  
C:\Program Files (x86)\du Mobile Broadband>cacls "du Mobile Broadband.exe"  
C:\Program Files (x86)\du Mobile Broadband\du Mobile Broadband.exe Everyone:F  
BUILTIN\Users:F  
NT AUTHORITY\SYSTEM:(ID)F  
BUILTIN\Administrators:(ID)F  
  
  
C:\Program Files (x86)\du Mobile Broadband>  
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