CVE-2025-65104 FirebirdSQL CVE debrief

Who should care

Database administrators, developers, and security teams using Firebird should assess exposure and prioritize upgrading to FB4 or higher client libraries to prevent potential data disclosure. Defenders should care about CVE-2025-65104 as it causes an information leak in Firebird client libraries, requiring immediate attention from database administrators and developers to upgrade to FB4 or higher and prevent potential data disclosure.

Why it matters

Defenders should care about CVE-2025-65104 as it causes an information leak in Firebird client libraries, requiring immediate attention from database administrators and developers to upgrade to FB4 or higher and prevent potential data disclosure.

• Potential information disclosure to unauthorized parties
• Need to verify and upgrade Firebird client libraries to FB4 or higher
• Possible data integrity issues if not properly mitigated
• Requires immediate attention from database administrators and developers

Technical summary

The Firebird client library versions FB3 incorrectly report data length values to FB4 or higher servers, resulting in an information leak. This issue affects database administrators and developers using Firebird, who should assess exposure and prioritize upgrading to FB4 or higher client libraries. The vulnerability has a high CVSS score of 7.9, indicating a significant risk. Upgrading to FB4 client or higher fixes this issue. Defenders should verify and upgrade Firebird client libraries to FB4 or higher, and review database configurations to ensure FB4 or higher client usage.

Defensive priority

Defenders should prioritize upgrading Firebird client libraries to FB4 or higher to prevent information leaks. This requires immediate attention from database administrators and developers using Firebird.

Recommended defensive actions

• Upgrade Firebird client libraries to FB4 or higher
• Review and update database configurations to ensure FB4 or higher client usage
• Monitor for potential information leaks and implement compensating controls if necessary
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and NVD entry provide details on the vulnerability. However, specific version details and exploitation scope require verification from official sources. The Firebird client library versions FB3 incorrectly report data length values to FB4 or higher servers, resulting in an information leak. This issue is fixed in FB4 client or higher. Database administrators and developers should verify affected scope, severity, and vendor guidance. They should also review compensating controls for exposed systems while remediation is

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.