CVE-2025-61789
📋 TL;DR
This vulnerability in Icinga DB Web allows authorized users to bypass variable protection mechanisms and guess values of protected or hidden custom variables. It affects users with access to the Icinga DB Web interface in versions before 1.1.4 and 1.2.3. The issue allows information disclosure of sensitive variable values that should be protected.
💻 Affected Systems
- Icinga DB Web
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Authorized users could discover sensitive configuration values, credentials, or other protected information stored in custom variables, potentially leading to further system compromise.
Likely Case
Authorized users with malicious intent could enumerate protected variable values, gaining unauthorized access to sensitive monitoring configuration data.
If Mitigated
With proper access controls and monitoring, the impact is limited to information disclosure within authorized user accounts.
🎯 Exploit Status
Exploitation requires authorized access and knowledge of filter manipulation. The vulnerability allows guessing protected variable values through filter manipulation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.1.4 or 1.2.3
Vendor Advisory: https://github.com/Icinga/icingadb-web/security/advisories/GHSA-w57j-28jc-8429
Restart Required: No
Instructions:
1. Identify your current Icinga DB Web version. 2. If using version <1.1.4, upgrade to 1.1.4. 3. If using version 1.2.x <1.2.3, upgrade to 1.2.3. 4. Verify the upgrade completed successfully.
🔧 Temporary Workarounds
Restrict User Access
allLimit Icinga DB Web access to only trusted, necessary users to reduce attack surface.
Monitor Filter Usage
allImplement logging and monitoring for unusual filter patterns or attempts to access protected variables.
🧯 If You Can't Patch
- Implement strict access controls and limit Icinga DB Web access to essential personnel only.
- Monitor and audit all user activity in Icinga DB Web for suspicious filter usage patterns.
🔍 How to Verify
Check if Vulnerable:
Check Icinga DB Web version. If version is less than 1.1.4 or between 1.2.0 and 1.2.2, the system is vulnerable.Check Version:
Check Icinga configuration or package manager for version information specific to your installation method.Verify Fix Applied:
After upgrading, verify the version is 1.1.4 or 1.2.3 or higher. Test that using protected variables in filters returns an error instead of allowing value guessing.📡 Detection & Monitoring
Log Indicators:
- Unusual filter patterns containing protected variable names
- Multiple failed attempts to access protected variables
- User activity showing enumeration patterns
Network Indicators:
- Unusual API calls to filter endpoints with custom variable parameters
SIEM Query:
source="icinga-web" AND (message="*filter*" OR message="*variable*") AND (message="*protected*" OR message="*denylist*")