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EyeLock Myris 3.3.2 SDK Service Unquoted Service Path Privilege Escalation

Low
Advisory ID
ZSL-2016-5355
Release Date
10 August 2016
Vendor
EyeLock, LLC - http://www.eyelock.com
Affected Version
3.3.21289.1311
CVE
N/A
Tested On
Microsoft Windows 7 Professional SP1 (EN), Microsoft Windows 7 Ultimate SP1 (EN)
Summary

myris® provides unparalleled security, is portable, lightweight and is as easy as looking in a mirror. Use myris to quickly and easily enroll users for EyeLock’s access control products or to grant users access to corporate domain environments within seconds—users never have to type their username and password again.

Description

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 user’s code would execute with the elevated privileges of the application.

Proof of Concept
Disclosure Timeline
10.06.2016Vulnerability discovered.
27.06.2016Contact with the vendor.
09.07.2016No response from the vendor.
10.08.2016Public security advisory released.
Credits
Vulnerability discovered by Gjoko Krstic
References
Changelog
10.08.2016Initial release
13.08.2016Added reference [1], [2], [3] and [4]