CVE-2025-2092
📋 TL;DR
This vulnerability causes Checkmk to write remote site authentication secrets to log files accessible to administrators. Attackers with access to these logs could obtain credentials to compromise connected monitoring sites. Affects Checkmk versions before 2.3.0p29, 2.2.0p41, and 2.1.0p49.
💻 Affected Systems
- Checkmk
📦 What is this software?
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⚠️ Risk & Real-World Impact
Worst Case
Attackers obtain authentication secrets and compromise all connected remote monitoring sites, potentially gaining administrative access to monitored systems.
Likely Case
Administrators or attackers with log access obtain authentication secrets and compromise specific remote monitoring sites.
If Mitigated
Log files are properly secured with restricted permissions, limiting exposure to authorized administrators only.
🎯 Exploit Status
Exploitation requires access to log files, typically through administrative privileges or file system access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.3.0p29, 2.2.0p41, or 2.1.0p49
Vendor Advisory: https://checkmk.com/werk/17780
Restart Required: Yes
Instructions:
1. Backup your Checkmk configuration. 2. Update to the patched version using your package manager or Checkmk's update mechanism. 3. Restart Checkmk services. 4. Verify the update was successful.
🔧 Temporary Workarounds
Restrict log file permissions
linuxSet strict file permissions on Checkmk log files to prevent unauthorized access.
chmod 640 /var/log/checkmk/*.log
chown root:omd /var/log/checkmk/*.log
Disable remote site authentication
allTemporarily disable remote site authentication if not required.
🧯 If You Can't Patch
- Implement strict access controls on log directories and files
- Monitor log file access and implement alerting for unauthorized access attempts
🔍 How to Verify
Check if Vulnerable:
Check your Checkmk version: omd version. If version is <2.3.0p29, <2.2.0p41, or <=2.1.0p49, you are vulnerable.Check Version:
omd versionVerify Fix Applied:
Verify version is >=2.3.0p29, >=2.2.0p41, or >=2.1.0p49. Check that authentication secrets no longer appear in log files.📡 Detection & Monitoring
Log Indicators:
- Authentication secrets appearing in Checkmk log files
- Unauthorized access to log directories
Network Indicators:
- Unusual authentication attempts to remote sites
SIEM Query:
source="checkmk.log" AND ("authentication" OR "secret" OR "password")