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Internet Security Systems Security Brief
August, 13, 2002

Remote Denial of Service Vulnerability in Oracle9i SQL*NET

Synopsis:

ISS X-Force has discovered a flaw in the debugging mechanism of Oracle9i. To
exploit this vulnerability, attackers must send a specially crafted request
to an Oracle9i SQL*NET listener. Due to an implementation flaw, Oracle9i
does not handle the request correctly and fails. All Oracle9i installations
are vulnerable to this attack.

Impact:

A successful attack on a vulnerable server can cause the SQL*NET listener to
fail and crash. Database functionality cannot be restored until the listener
is manually restarted.

Affected Versions:

Oracle9i 9.0.x
Oracle9i 9.2

Note: All platforms for the affected versions are vulnerable.

For the complete ISS X-Force Security Advisory, please visit:
http://bvlive01.iss.net/issEn/delivery/xforce/alertdetail.jsp?oid=20941

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About Internet Security Systems (ISS)
Founded in 1994, Internet Security Systems (ISS) (Nasdaq: ISSX) is a
pioneer and world leader in software and services that protect critical
online resources from an ever-changing spectrum of threats and misuse.
Internet Security Systems is headquartered in Atlanta, GA, with
additional operations throughout the Americas, Asia, Australia, Europe
and the Middle East.

Copyright (c) 2002 Internet Security Systems, Inc. All rights reserved
worldwide.

Permission is hereby granted for the electronic redistribution of this
document. It is not to be edited or altered in any way without the
express written consent of the Internet Security Systems X-Force. If you
wish to reprint the whole or any part of this document in any other
medium excluding electronic media, please email xforceiss.net for
permission.

Disclaimer: The information within this paper may change without notice.
Use of this information constitutes acceptance for use in an AS IS
condition. There are NO warranties, implied or otherwise, with regard to
this information or its use. Any use of this information is at the
user's risk. In no event shall the author/distributor (Internet Security
Systems X-Force) be held liable for any damages whatsoever arising out
of or in connection with the use or spread of this information.

X-Force PGP Key available on MIT's PGP key server and PGP.com's key
server, as well as at http://www.iss.net/security_center/sensitive.php

Please send suggestions, updates, and comments to: X-Force
xforceiss.net of Internet Security Systems, Inc.

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