firebird2.0 security bug is now fixed in debian/gentoo
There is an grave security bug in firebird package 2.0 from debian and ubuntu
where an user can connect to the server with SYSDBA and NO password
The bug is now fixed in debian sid (unstable)
http://packages.debian.org/sid/firebird2.0-super
and here is the changelog
firebird2.0-super.init: stop exporting ISC_USER and ISC_PASSWORD.
Fixes a hole causing remote connections as user SYSDBA to succeed
without giving a password.
Closes: #481389 and CVE-2008-1880