Unspecified vulnerability in the server in Firebird before 2.0.2 allows remote attackers to cause a denial of service (daemon crash) via an XNET session that makes multiple simultaneous requests to register events, aka CORE-1403.
https://exchange.xforce.ibmcloud.com/vulnerabilities/36353
http://www.vupen.com/english/advisories/2007/3021
http://www.securityfocus.com/bid/25497
http://www.firebirdsql.org/rlsnotes/Firebird-2.0.2-ReleaseNotes.pdf
http://www.firebirdsql.org/index.php?op=files&id=engine_202
http://www.debian.org/security/2008/dsa-1529
http://tracker.firebirdsql.org/browse/CORE-1403
http://sourceforge.net/project/shownotes.php?release_id=535898