CVE-2025-24975 | BDVDB-2026-289963 Detail
FirebirdSQLfirebird
Description#
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.
Impact#
Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact low. Attack vector: network.
Weaknesses#
- CWE-754 Improper Check for Unusual or Exceptional Conditions
References#
- https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-fx9r-rj68-7p69
- https://github.com/FirebirdSQL/firebird/issues/8429
- https://github.com/FirebirdSQL/firebird/commit/658abd20449f72097fbbce57e8e6ae42ff837fb6
- https://www.vicarius.io/vsociety/posts/cve-2025-24975-detect-vulnerable-firebird
- https://www.vicarius.io/vsociety/posts/cve-2025-24975-mitigate-firebird-vulnerability
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.