CVE-2020-7206
📋 TL;DR
CVE-2020-7206 is a PHP code injection vulnerability in HP's Nagios plugin for iLO management. It allows remote attackers to execute arbitrary PHP code on systems running vulnerable versions. This affects organizations using HP Integrated Lights-Out (iLO) management with the Nagios monitoring plugin.
💻 Affected Systems
- HP nagios-plugins-hpilo
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data exfiltration, and lateral movement within the network.
Likely Case
Unauthenticated attackers gaining shell access to the monitoring server, potentially compromising iLO management credentials.
If Mitigated
Limited impact if network segmentation isolates monitoring systems and proper access controls are implemented.
🎯 Exploit Status
The vulnerability is in PHP code that processes user input without proper sanitization, making exploitation straightforward.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v1.51 and later
Vendor Advisory: https://github.com/HewlettPackard/nagios-plugins-hpilo/commit/7617b2736a95c7f354198f092febe37e7005c677
Restart Required: No
Instructions:
1. Download latest version from GitHub. 2. Replace existing plugin files. 3. Verify PHP code injection vectors are sanitized.
🔧 Temporary Workarounds
Network Isolation
linuxRestrict access to Nagios web interface to trusted IP addresses only.
iptables -A INPUT -p tcp --dport 80 -s trusted_ip -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
Disable Plugin
allTemporarily disable the HP iLO plugin in Nagios configuration.
# Comment out HP iLO plugin definitions in nagios configuration files
🧯 If You Can't Patch
- Implement strict network segmentation to isolate monitoring systems
- Apply web application firewall rules to block PHP code injection patterns
🔍 How to Verify
Check if Vulnerable:
Check plugin version: grep -r 'version' /usr/local/nagios/libexec/check_hpilo.phpCheck Version:
grep -i 'version' /path/to/check_hpilo.php | head -1Verify Fix Applied:
Verify version is 1.51 or later and check for proper input sanitization in PHP files.📡 Detection & Monitoring
Log Indicators:
- Unusual PHP execution errors in web server logs
- Suspicious POST requests to Nagios plugin endpoints
Network Indicators:
- HTTP requests containing PHP code patterns to Nagios URLs
- Unexpected outbound connections from monitoring systems
SIEM Query:
source="web_server" AND (url="*check_hpilo*" AND (method="POST" OR params="*php*"))