CVE-2025-34270
📋 TL;DR
Nagios Log Server versions before 2024R2.0.2 expose plaintext AD/LDAP passwords during user import operations. This allows administrators or users with access to import results to view sensitive credentials. Organizations using AD/LDAP authentication with vulnerable Nagios Log Server versions are affected.
💻 Affected Systems
- Nagios Log Server
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Administrators or malicious insiders capture AD/LDAP credentials, leading to domain compromise, lateral movement, and data exfiltration.
Likely Case
Authorized administrators accidentally view passwords in logs or UI, potentially exposing credentials through screenshots or log sharing.
If Mitigated
With proper access controls and monitoring, exposure is limited to trusted administrators who follow credential handling policies.
🎯 Exploit Status
Exploitation requires administrative or import privileges. Attackers need access to Nagios Log Server interface or logs.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2024R2.0.2
Vendor Advisory: https://www.nagios.com/changelog/#log-server
Restart Required: No
Instructions:
1. Backup current configuration. 2. Download Nagios Log Server 2024R2.0.2 from Nagios website. 3. Follow upgrade instructions in documentation. 4. Verify AD/LDAP import functionality works correctly.
🔧 Temporary Workarounds
Disable AD/LDAP Import
allTemporarily disable AD/LDAP user import functionality until patching is complete
# Edit Nagios Log Server configuration to remove AD/LDAP import settings
# Consult Nagios documentation for specific configuration file locations
Use Local Authentication
allSwitch to local user accounts instead of AD/LDAP import until patch is applied
# Create local users via Nagios Log Server interface
# Disable AD/LDAP authentication in settings
🧯 If You Can't Patch
- Restrict access to Nagios Log Server interface to essential administrators only
- Implement strict logging and monitoring for AD/LDAP import activities
🔍 How to Verify
Check if Vulnerable:
Check Nagios Log Server version via web interface or command line. If version is below 2024R2.0.2 and AD/LDAP import is configured, system is vulnerable.Check Version:
grep 'version' /usr/local/nagioslogserver/nagioslogserver/version.txt || cat /usr/local/nagioslogserver/version.txtVerify Fix Applied:
After upgrading to 2024R2.0.2, perform test AD/LDAP import and verify passwords are not displayed in plaintext in UI or logs.📡 Detection & Monitoring
Log Indicators:
- Plaintext password strings in Nagios Log Server application logs
- AD/LDAP import operations with password field visible
Network Indicators:
- HTTP requests to user import endpoints with password parameters
SIEM Query:
source="nagios_log_server" AND ("password" OR "import" OR "AD" OR "LDAP")