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 --- 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>