# Exploit Title: Comodo Chromodo Browser Unquoted Service Path Privilege Escalation
# Date: 03/10/2016
# 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/chromodo-private-internet-browser.php
# Version: Software Version <= 52.15.25.664
# Tested on: Windows 7 x86/x64
1. Description
Comodo Chromodo Browser Update Service (ChromodoUpdater) 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 ChromodoUpdater
[SC] QueryServiceConfig SUCCESS
SERVICE_NAME: ChromodoUpdater
TYPE : 10 WIN32_OWN_PROCESS
START_TYPE : 2 AUTO_START
ERROR_CONTROL : 1 NORMAL
BINARY_PATH_NAME : C:\Program Files\Comodo\Chromodo\chromodo_updater.exe
LOAD_ORDER_GROUP :
TAG : 0
DISPLAY_NAME : COMODO Chromodo 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 52.15.25.665
https://forums.comodo.com/news-announcements-feedback-cd/chromodo-v521525665-is-now-available-for-download-t116787.0.html
Vulnerability Disclosure Timeline:
=========================
03/10/2016 - Contact With Vendor
03/10/2016 - Vendor Response
05/10/2016 - Release Fixed Version
