FirebirdSQL Firebird prior 4.0.6.3183/5.0.2.1610/6.0.0.609 firebird.conf unusual condition

Summaryinfo

A vulnerability was found in FirebirdSQL Firebird. It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the file firebird.conf. The manipulation results in unusual condition. This vulnerability was named CVE-2025-24975. The attack may be performed from remote. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in FirebirdSQL Firebird. It has been classified as problematic. Affected is some unknown processing of the file firebird.conf. The manipulation with an unknown input leads to a unusual condition vulnerability. CWE is classifying the issue as CWE-754. The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Firebird is a relational database. Prior to snapshot versions 4.0.6.3183, 5.0.2.1610, and 6.0.0.609, Firebird is vulnerable if ExtConnPoolSize is not set equal to 0. If connections stored in ExtConnPool are not verified for presence and suitability of the CryptCallback interface is used when created versus what is available could result in a segfault in the server process. Encrypted databases, accessed by execute statement on external, may be accessed later by an attachment missing a key to that database. In a case when execute statement are chained, segfault may happen. Additionally, the segfault may affect unencrypted databases. This issue has been patched in snapshot versions 4.0.6.3183, 5.0.2.1610, and 6.0.0.609 and point releases 4.0.6 and 5.0.2. A workaround for this issue involves setting ExtConnPoolSize equal to 0 in firebird.conf.

The advisory is available at github.com. This vulnerability is traded as CVE-2025-24975 since 01/29/2025. The exploitability is told to be difficult. It is possible to launch the attack remotely. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 259889 (Debian dsa-5992 : firebird-dev - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.0.6.3183, 5.0.2.1610 or 6.0.0.609 eliminates this vulnerability. Applying the patch 658abd20449f72097fbbce57e8e6ae42ff837fb6 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (259889) and CERT Bund (WID-SEC-2025-1857). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

• Firebird Firebird

Productinfo

Type

• Database Administration Software

Vendor

• FirebirdSQL

Name

• Firebird

License

• open-source

Website

• Product: https://github.com/FirebirdSQL/firebird/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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