Orthanc DICOM Server 1.1.0 Unquoted Service Path Privilege Escalation Vendor: SA(c)bastien Jodogne Product web page: http://www.orthanc-server.com Affected version: 1.1.0 Summary: Orthanc is a Belgian, open-source, lightweight RESTful DICOM server for healthcare and medical research with an ubiquitous web interface that enables you to upload, receive and transfer DICOM images. It comes with a REST API to automate imaging flows and an SDK to integrate with native applications. Desc: The application suffers from an unquoted search path issue impacting the service 'orthanc' for Windows deployed as part of Orthanc DICOM server 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) Vulnerability discovered by Gjoko 'LiquidWorm' Krstic @zeroscience Advisory ID: ZSL-2016-5379 Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5379.php Vendor: https://bitbucket.org/sjodogne/orthanc/src/Orthanc-1.2.0/NEWS?fileviewer=file-view-default 22.11.2016 -- C:\>sc qc orthanc [SC] QueryServiceConfig SUCCESS SERVICE_NAME: orthanc TYPE : 10 WIN32_OWN_PROCESS START_TYPE : 2 AUTO_START ERROR_CONTROL : 1 NORMAL BINARY_PATH_NAME : C:\Program Files (x86)\Orthanc\Orthanc Server 1.1.0\OrthancService.exe LOAD_ORDER_GROUP : TAG : 0 DISPLAY_NAME : Orthanc DEPENDENCIES : SERVICE_START_NAME : LocalSystem