Comodo Dragon Browser - Unquoted Service Path Privilege Escalation

EDB-ID:

40471

CVE:

N/A


Author:

Th3GundY

Type:

local


Platform:

Windows

Date:

2016-10-06


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# Exploit Title: Comodo Dragon Browser Unquoted Service Path Privilege Escalation
# Date: 24/09/2016
# Author: Yunus YILDIRIM (@Th3GundY)
# Team: CT-Zer0 (@CRYPTTECH)
# Website: http://yildirimyunus.com
# Contact: yunusyildirim@protonmail.com
# Category: local
# Vendor Homepage: https://www.comodo.com
# Software Link: https://www.comodo.com/home/browsers-toolbars/browser.php
# Version: Software Version <= 52.15.25.663
# Tested on: Windows 7 x86/x64

1. Description

Comodo Dragon Browser Update Service (DragonUpdater) 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:\>sc qc DragonUpdater
[SC] QueryServiceConfig SUCCESS
SERVICE_NAME: DragonUpdater
        TYPE               : 10  WIN32_OWN_PROCESS 	
        START_TYPE         : 2   AUTO_START
        ERROR_CONTROL      : 1   NORMAL
        BINARY_PATH_NAME   : C:\Program Files (x86)\Comodo\Dragon\dragon_updater.exe
        LOAD_ORDER_GROUP   : 
        TAG                : 0
        DISPLAY_NAME       : COMODO Dragon Update Service
        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.


Additional notes :

Fixed in version 52.15.25.664
https://forums.comodo.com/news-announcements-feedback-cd/comodo-dragon-v521525664-is-now-available-for-download-t116786.0.html

Vulnerability Disclosure Timeline:
=========================
24/09/2016   -   Contact With Vendor
26/09/2016   -   Vendor Response
03/10/2016   -   Release Fixed Version