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TITLE:
Firebird "op_connect_request" Packet Denial of Service

SECUNIA ADVISORY ID:
SA36026

VERIFY ADVISORY:
http://secunia.com/advisories/36026/

DESCRIPTION:
A vulnerability has been reported in Firebird, which can be exploited
by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error in the processing of
"op_connect_request" packets and can be exploited to cause a DoS by
sending a specially crafted packet to an affected system.

Successful exploitation allows to close the listening port 3050/TCP
for 2.1.x and 2.0.x releases, or crash the server for 1.5.x versions.

SOLUTION:
Fixed in the CVS repositories.

http://firebird.cvs.sourceforge.net/firebird/firebird2/src/remote/server.cpp
http://firebird.cvs.sourceforge.net/firebird/firebird2/src/remote/server.cpp?r1=1.260&r2=1.261
http://firebird.cvs.sourceforge.net/firebird/firebird2/src/remote/server.cpp?r1=1.158.2.6&r2=1.158.2.7
http://firebird.cvs.sourceforge.net/firebird/firebird2/src/remote/server.cpp?r1=1.126.2.16&r2=1.126.2.17
http://firebird.cvs.sourceforge.net/firebird/firebird2/src/remote/server.cpp?r1=1.34.2.7&r2=1.34.2.8

PROVIDED AND/OR DISCOVERED BY:
Francisco Falcon, Core Security Technologies.

ORIGINAL ADVISORY:
Firebird:
http://tracker.firebirdsql.org/browse/CORE-2563

CORE-2009-0707:
http://www.coresecurity.com/content/firebird-sql-dos

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