Orthanc DICOM Server 1.1.0 Unquoted Service Path Privilege Escalation

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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  
  
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