Foxit Cloud Update Service: https://www.foxitsoftware.com
By Ross Marks: http://www.rossmarks.co.uk
Exploit-db: https://www.exploit-db.com/author/?a=8724
Category: Local
Tested on: Windows 10 x86/x64
1) Unquoted Service Path Privilege Escalation
Foxit reader's "cloud safe update service" installs as a service with an unquoted service path running with SYSTEM privileges.
This could potentially allow an authorized but non-privileged localuser to execute arbitrary code with elevated privileges on the system.
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.
PoC:
C:\>sc qc FoxitCloudUpdateService
[SC] QueryServiceConfig SUCCESS
SERVICE_NAME: FoxitCloudUpdateService
TYPE : 10 WIN32_OWN_PROCESS
START_TYPE : 2 AUTO_START
ERROR_CONTROL : 1 NORMAL
BINARY_PATH_NAME : C:\Program Files (x86)\FOXIT SOFTWARE\FOXIT READER\Foxit Cloud\FCUpdateService.exe
LOAD_ORDER_GROUP :
TAG : 0
DISPLAY_NAME : Foxit Cloud Safe Update Service
DEPENDENCIES :
SERVICE_START_NAME : LocalSystem
