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EyeLock Myris 3.3.2 SDK Service Unquoted Service Path Privilege Escalation

EyeLock Myris 3.3.2 SDK Service Unquoted Service Path Privilege Escalation
Posted Aug 10, 2016
Authored by LiquidWorm | Site zeroscience.mk

EyeLock Myris version 3.3.2 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 user's code would execute with the elevated privileges of the application.

tags | exploit, arbitrary, local, root
systems | windows
SHA-256 | 9944b9c11776ab7fd7b3d7678b418928869f0f411d1520d8bd1bf55a41f75093

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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