CVE-2023-48084
📋 TL;DR
Nagios XI versions before 5.11.3 contain a SQL injection vulnerability in the bulk modification tool that allows attackers to execute arbitrary SQL commands. This affects all Nagios XI installations running vulnerable versions. Successful exploitation could lead to data theft, system compromise, or complete control of the monitoring system.
💻 Affected Systems
- Nagios XI
📦 What is this software?
Nagios Xi by Nagios
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attacker to execute arbitrary code, steal all monitoring data, pivot to other systems, and maintain persistent access.
Likely Case
Data exfiltration of monitoring configurations, credentials, and system information leading to further attacks on monitored infrastructure.
If Mitigated
Limited impact with proper input validation and database permissions, potentially only allowing data viewing without modification.
🎯 Exploit Status
SQL injection vulnerabilities are commonly weaponized. Authentication is typically required to access the bulk modification tool.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.11.3
Vendor Advisory: https://www.nagios.com/products/security/
Restart Required: Yes
Instructions:
1. Backup current Nagios XI installation and database. 2. Download Nagios XI 5.11.3 from official Nagios website. 3. Follow upgrade instructions in Nagios XI documentation. 4. Restart Nagios XI services. 5. Verify upgrade completed successfully.
🔧 Temporary Workarounds
Disable Bulk Modification Tool
linuxTemporarily disable the vulnerable bulk modification tool feature
# Remove or restrict access to bulk modification tool files
# Location varies by installation - typically in /usr/local/nagiosxi/html/includes/
Network Access Control
linuxRestrict access to Nagios XI web interface to trusted IPs only
# Example using iptables
iptables -A INPUT -p tcp --dport 80 -s TRUSTED_IP -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s TRUSTED_IP -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Nagios XI from critical systems
- Enable detailed SQL query logging and monitor for injection patterns
🔍 How to Verify
Check if Vulnerable:
Check Nagios XI version via web interface (Admin → System Status) or command line: grep 'nagios_version' /usr/local/nagiosxi/var/xiversionCheck Version:
grep 'nagios_version' /usr/local/nagiosxi/var/xiversionVerify Fix Applied:
Verify version is 5.11.3 or higher and test bulk modification tool functionality📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in database logs
- Multiple failed login attempts followed by bulk modification access
- Unexpected database schema changes
Network Indicators:
- SQL injection patterns in HTTP requests to /nagiosxi/includes/
- Unusual database connections from Nagios XI host
SIEM Query:
source="nagios_access.log" AND (uri="/nagiosxi/includes/*" AND (method="POST" OR method="GET") AND (query CONTAINS "UNION" OR query CONTAINS "SELECT" OR query CONTAINS "INSERT" OR query CONTAINS "DELETE"))