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 -- 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)\0patchAgent\0PatchServicex64.exe LOAD_ORDER_GROUP : TAG : 0 DISPLAY_NAME : 0patch Service DEPENDENCIES : SERVICE_START_NAME : LocalSystem C:>cacls "C:Program Files (x86)\0patchAgent\0PatchServicex64.exe" C:Program Files (x86)\0patchAgent\0patchServicex64.exe NT AUTHORITYSYSTEM:(ID)F BUILTINAdministrators:(ID)F BUILTINUsers:(ID)R C:>