EyeLock Myris 3.3.2 SDK Service Unquoted Service Path Privilege Escalation

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EyeLock Myris 3.3.2 SDK Service Unquoted Service Path Privilege Escalation  
  
  
Vendor: EyeLock, LLC  
Product web page: http://www.eyelock.com  
Affected version: 3.3.21289.1311  
  
Summary: myrisA(r) provides unparalleled security, is portable, lightweight  
and is as easy as looking in a mirror. Use myris to quickly and easily  
enroll users for EyeLockas access control products or to grant users  
access to corporate domain environments within secondsausers never have  
to type their username and password again.  
  
Desc: The application suffers from an unquoted search path issue impacting  
the service 'MyrisService' for Windows deployed as part of Myris 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 useras code would execute with the elevated privileges  
of the application.  
  
Tested on: Microsoft Windows 7 Professional SP1 (EN)  
Microsoft Windows 7 Ultimate SP1 (EN)  
  
  
Vulnerability discovered by Gjoko 'LiquidWorm' Krstic  
@zeroscience  
  
  
Advisory ID: ZSL-2016-5355  
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5355.php  
  
  
10.06.2016  
  
--  
  
  
C:\Users\joxy>sc qc MyrisService  
[SC] QueryServiceConfig SUCCESS  
  
SERVICE_NAME: MyrisService  
TYPE : 10 WIN32_OWN_PROCESS  
START_TYPE : 2 AUTO_START  
ERROR_CONTROL : 1 NORMAL  
BINARY_PATH_NAME : C:\Program Files (x86)\Eyelock Corporation\MyrisSDK\bin\MyrisService.exe  
LOAD_ORDER_GROUP :  
TAG : 0  
DISPLAY_NAME : Myris SDK Service  
DEPENDENCIES :  
SERVICE_START_NAME : LocalSystem  
  
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