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Droid4X Privilege Escalation

Posted on 11 November 2016

# Exploit Title: Droid4X Unquoted Service Path Privilege Escalation # Date: 03/10/2016 # Author: Yunus YILDIRIM (Th3GundY) # Team: CT-Zer0 (@CRYPTTECH) && Superbug (@xsuperbug) # Website: http://yildirimyunus.com # Contact: yunusyildirim@protonmail.com # Category: local # Vendor Homepage: http://www.droid4x.com/ # Software Link: http://dl.haima.me/download/DXDown/win/Z001/Droid4XInstaller.exe # Tested on: Windows 7 x86/x64 1. Description Droid4XService (Droid4XService.exe) installs as a service with an unquoted service path running with SYSTEM privileges. This could potentially allow an authorized but non-privileged local user to execute arbitrary code with elevated privileges on the system. 2. Proof of Concept C:Windowssystem32>sc qc Droid4XService [SC] QueryServiceConfig SUCCESS SERVICE_NAME: Droid4XService TYPE : 110 WIN32_OWN_PROCESS (interactive) START_TYPE : 2 AUTO_START ERROR_CONTROL : 1 NORMAL BINARY_PATH_NAME : C:Program Files (x86)Droid4XDroid4XService.exe LOAD_ORDER_GROUP : TAG : 0 DISPLAY_NAME : Droid4XService DEPENDENCIES : SERVICE_START_NAME : LocalSystem 3. Exploit: A successful attempt would require the local attacker must insert an executable file in the path of the service. Upon service restart or system reboot, the malicious code will be run with elevated privileges. Vulnerability Disclosure Timeline: ================================== 03/10/2016 - Contact With Vendor 27/10/2016 - No Response From Vendor 09/11/2016 - Public Disclosure

 

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