Firebird is "a relational database offering many ANSI SQL-92 features that runs on Linux, Windows, and a variety of Unix platforms. Firebird offers excellent concurrency, high performance, and powerful language support for stored procedures and triggers. It has been used in production systems, under a variety of names since 1981".
A vulnerability in Firebird Database's way of handling database names, allows an unauthenticated user to cause the server to crash, and overwrite critical section of the stack used by the database.
On a remote server, you can see that: gdb /usr/lib/firebird/bin/ibserver
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This GDB was configured as "i386-linux"...(no debugging symbols found)...Using host libthread_db library