CVE-2025-54989: firebird Null Dereference — Fix

Description

Firebird is a relational database. Prior to versions 3.0.13, 4.0.6, and 5.0.3, there is an XDR message parsing NULL pointer dereference denial-of-service vulnerability in Firebird. This specific flaw exists within the parsing of xdr message from client. It leads to NULL pointer dereference and DoS. This issue has been patched in versions 3.0.13, 4.0.6, and 5.0.3.

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CVSS v3.1 Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Weakness Type (CWE)

CWE-476 CWE-476

Affected Products

Vendor	Product	Versions
firebirdsql	firebird	< 3.0.13
firebirdsql	firebird	4.0.0 — 4.0.6
firebirdsql	firebird	5.0.0 — 5.0.3

References

Advisories & Patches

https://github.com/FirebirdSQL/firebird/commit/169da595f8693fc1a65a79c741724b1bc8db9f25

Other References

https://github.com/FirebirdSQL/firebird/issues/8554 https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-7qp6-hqxj-pjjp https://lists.debian.org/debian-lts-announce/2025/08/msg00021.html

Frequently Asked Questions

What is CVE-2025-54989? +

Firebird is a relational database. Prior to versions 3.0.13, 4.0.6, and 5.0.3, there is an XDR message parsing NULL pointer dereference denial-of-service vulnerability in Firebird. This specific flaw exists within the parsing of xdr message from client. It leads to NULL pointer dereference and DoS. This issue has been patched in versions 3.0.13, 4.0.6, and 5.0.3. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2025-54989? +

CVE-2025-54989 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-54989? +

CVE-2025-54989 affects products from firebirdsql, specifically: firebird. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-54989? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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