Debian bug fixed : CVE-2017-6369: authenticated remote execution in firebird 2.5 before version 3.0.2

We believe that the bug you reported is fixed in the latest version of
firebird3.0, which is due to be installed in the Debian FTP archive.

 * Apply commit 56e9a73c168 from upstream B3_0_Release branch
    fixing authenticated remote execution vulnerability (CVE-2017-6369,
    CORE-5474)
    Closes: #858644

Forwarded: http://tracker.firebirdsql.org/browse/CORE-5474

Authenticated Firebird users are allowed to declare UDFs (user-defined
functions). The default config allows using all entry points from the standard
UDF library, which is dynamically linked with libc, with its symbols
re-exported, including system().

Relevant upstream commits for 3.0:
– https://github.com/FirebirdSQL/firebird/commit/8b2a9cb44bf6055e15f016d70a6842b8ada60375