CVE-2025-28059
📋 TL;DR
This vulnerability allows deleted users in Nagios Network Analyzer to maintain access to restricted system functions because their sessions and API tokens aren't properly invalidated upon account deletion. Attackers could exploit this to access sensitive data or perform unauthorized actions. Organizations running Nagios Network Analyzer 2024R1.0.3 are affected.
💻 Affected Systems
- Nagios Network Analyzer
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Deleted users with elevated privileges could maintain persistent access, modify configurations, exfiltrate sensitive network monitoring data, or disrupt monitoring operations.
Likely Case
Former employees or contractors retain access to dashboards and monitoring data they should no longer see, potentially exposing sensitive network information.
If Mitigated
With proper session timeout policies and additional authentication layers, impact is limited to temporary unauthorized access until sessions naturally expire.
🎯 Exploit Status
Exploitation requires a valid user session that should have been terminated. The GitHub reference demonstrates the issue.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Nagios changelog for latest version
Vendor Advisory: https://www.nagios.com/changelog/#network-analyze
Restart Required: Yes
Instructions:
1. Check current Nagios Network Analyzer version
2. Visit Nagios changelog for latest patches
3. Apply vendor-recommended update
4. Restart Nagios services
🔧 Temporary Workarounds
Manual Session Termination
allManually terminate all active sessions after user deletion
# Check Nagios documentation for session management commands specific to your installation
Reduce Session Timeout
allDecrease session timeout values to limit exposure window
# Modify session timeout in Nagios configuration files per vendor documentation
🧯 If You Can't Patch
- Implement strict access reviews and monitor for anomalous activity from deleted user accounts
- Force logout all users and rotate API tokens after any user deletion
🔍 How to Verify
Check if Vulnerable:
Check if running Nagios Network Analyzer version 2024R1.0.3 via web interface or configuration filesCheck Version:
# Check Nagios web interface admin panel or configuration files for version informationVerify Fix Applied:
Verify updated to patched version and test that deleted users cannot access system with old sessions📡 Detection & Monitoring
Log Indicators:
- Login attempts from deleted user accounts
- API access with tokens belonging to deleted users
- Session activity after user deletion timestamp
Network Indicators:
- API requests with stale authentication tokens
- Unexpected traffic patterns from previously authorized IPs
SIEM Query:
source="nagios" AND (event_type="authentication" OR event_type="api_call") AND user_status="deleted"