AsusWRT LAN Unauthenticated Remote Code Execution
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(s)
- Pedro Ribeiro <pedrib@gmail.com>
Platform
Unix
Architectures
cmd
Development
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
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