Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, when the server receives an op_crypt_key_callback packet without prior authentication, the port_server_crypt_callback handler is not initialized, resulting in a null pointer dereference and server crash. An unauthenticated attacker who knows only the servers IP and port can exploit this to crash the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.
Weakness
The product dereferences a pointer that it expects to be valid but is NULL.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Firebird | Firebirdsql | * | 3.0.14 (excluding) |
| Firebird | Firebirdsql | 4.0.0 (including) | 4.0.7 (excluding) |
| Firebird | Firebirdsql | 5.0.0 (including) | 5.0.4 (excluding) |
| Firebird3.0 | Ubuntu | upstream | * |
| Firebird4.0 | Ubuntu | upstream | * |
Potential Mitigations
References
- https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14
- https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7
- https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4
- https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-xrcw-wpjx-pr95
- https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-xrcw-wpjx-pr95