module

AsusWRT LAN Unauthenticated Remote Code Execution

Try Surface Command
Back to search
Disclosed
Jan 22, 2018
Created
Jun 14, 2018

Description

The HTTP server in AsusWRT has a flaw where it allows an unauthenticated client to
perform a POST in certain cases. This can be combined with another vulnerability in
the VPN configuration upload routine that sets NVRAM configuration variables directly
from the POST request to enable a special command mode.
This command mode can then be abused by sending a UDP packet to infosvr, which is running
on port UDP 9999 to directly execute commands as root.
This exploit leverages that to start telnetd in a random port, and then connects to it.
It has been tested with the RT-AC68U running AsusWRT Version 3.0.0.4.380.7743.

Author

Pedro Ribeiro pedrib@gmail.com

Platform

Unix

Architectures

cmd

References

Module Options

To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':


    msf > use exploit/linux/http/asuswrt_lan_rce
    msf exploit(asuswrt_lan_rce) > show targets
        ...targets...
    msf exploit(asuswrt_lan_rce) > set TARGET < target-id >
    msf exploit(asuswrt_lan_rce) > show options
        ...show and set options...
    msf exploit(asuswrt_lan_rce) > exploit
Title
NEW

Explore Exposure Command

Confidently identify and prioritize exposures from endpoint to cloud with full attack surface visibility and threat-aware risk context.

Try it today