ACROS Security 0patch 2016.05.19.539 Privilege Escalation

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ACROS Security 0patch (0PatchServicex64.exe) Unquoted Service Path Privilege Escalation  
  
  
Vendor: ACROS, d.o.o.  
Product web page: https://www.0patch.com  
Affected version: 2016.05.19.539  
  
Summary: 0patch (pronounced 'zero patch') is a platform for instantly  
distributing, applying and removing microscopic binary patches to/from  
running processes without having to restart these processes (much less  
reboot the entire computer).  
  
Desc: The application suffers from an unquoted search path issue impacting  
the service '0patchservice' for Windows deployed as part of 0patch solution.  
This could potentially allow an authorized but non-privileged local user to  
execute arbitrary code with elevated privileges on the system. A successful  
attempt would require the local user to be able to insert their code in the  
system root path undetected by the OS or other security applications where  
it could potentially be executed during application startup or reboot. If  
successful, the local user’s code would execute with the elevated privileges  
of the application.  
  
Tested on: Microsoft Windows 7 Ultimate SP1 (EN)  
Microsoft Windows 7 Professional SP1 (EN)  
  
  
Vulnerability discovered by Gjoko 'LiquidWorm' Krstic  
@zeroscience  
  
  
Advisory ID: ZSL-2016-5331  
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5331.php  
  
Vendor: https://0patch.blogspot.com/2016/06/new-release-0patch-agent-20160614850.html  
  
  
08.06.2016  
  
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C:\>sc qc 0patchservice  
[SC] QueryServiceConfig SUCCESS  
  
SERVICE_NAME: 0patchservice  
TYPE : 10 WIN32_OWN_PROCESS  
START_TYPE : 2 AUTO_START  
ERROR_CONTROL : 1 NORMAL  
BINARY_PATH_NAME : C:\Program Files (x86)\0patch\Agent\0PatchServicex64.exe  
LOAD_ORDER_GROUP :  
TAG : 0  
DISPLAY_NAME : 0patch Service  
DEPENDENCIES :  
SERVICE_START_NAME : LocalSystem  
  
C:\>cacls "C:\Program Files (x86)\0patch\Agent\0PatchServicex64.exe"  
C:\Program Files (x86)\0patch\Agent\0patchServicex64.exe NT AUTHORITY\SYSTEM:(ID)F  
BUILTIN\Administrators:(ID)F  
BUILTIN\Users:(ID)R  
  
  
C:\>  
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