An unspecified vulnerability was found in FireBird. By exploiting this vulnerability malicious users can cause denial of service. This vulnerability can be exploited remotely via a specially designed message.

FireBird SQL 1.5 versions 1.5.5 and earlier
FireBird SQL 2.0 versions 2.0.5 and earlier
FireBird SQL 2.1 versions 2.1.2 and earlier
FireBird SQL 2.5 versions beta 1 and earlier

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FireBird SQL

The following public exploits exists for this vulnerability:

https://www.exploit-db.com/exploits/9295