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How the CVE Works
This vulnerability exists in the web interface of Icinga DB, a monitoring system component. Authorized users with access to Icinga DB Web can create filters using custom variables. The system has configuration settings (icingadb/protect/variables and icingadb/denylist/variables) intended to restrict access to specific sensitive variables. However, in affected versions, these protection mechanisms fail when a variable is used within a filter context. An attacker can exploit this by crafting a filter that includes a protected variable name. The application processes this filter instead of blocking the request. By observing the application’s responses (whether it returns data, an error, or behaves differently), the attacker can infer information. This allows for a side-channel attack to guess the values assigned to hidden or protected custom variables. The vulnerability does not require direct read access to the variable. It bypasses intended security controls through improper validation in the filter logic. Successful exploitation leads to unauthorized information disclosure. The flaw is fixed in versions 1.1.4 and 1.2.3, where such requests now correctly return an error.
DailyCVE Form
Platform: Icinga DB Web
Version: <1.1.4, <1.2.3
Vulnerability: Filter bypass disclosure
Severity: Not specified
Date: 2025-10-16
Prediction: Fixed versions released
What Undercode Say
Bash Commands and Code: No public exploit code. Check version with icingadb-web --version. Update via package manager: apt upgrade icingadb-web.
How Exploit: 1. Attacker gains authorized web access. 2. Identifies a protected/hidden variable name. 3. Crafts API filter requests using the variable. 4. Analyzes system responses to guess variable values.
Protection from this CVE: Upgrade to Icinga DB Web version 1.1.4 or 1.2.3 immediately. Review and minimize user permissions. Audit custom variable usage.
Impact: Unauthorized disclosure of sensitive monitoring data or configuration values stored in custom variables.
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Sources:
Reported By: nvd.nist.gov
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