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[ISSForum] ISS Protection Brief: Entrust Libkmp Library Buffer Overflow



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Internet Security Systems Protection Brief
August  26, 2004

Entrust LibKmp Library Buffer Overflow

Summary:

ISS X-Force has discovered a flaw in the Entrust LibKmp ISAKMP library.
This library is used by multiple VPN vendors to facilitate IKE key
exchange for IPSEC-based VPN products. LibKmp handles virtually all
processing of inbound ISAKMP packets. This library is also responsible
for the validation and sanity checking of inbound requests. A flaw exists
in these validation routines that results in a buffer overflow
vulnerability.



Business Impact:


Compromise of VPN servers and enterprise firewalls may lead to exposure of
confidential information, loss of productivity, and further network
compromise. This flaw may allow attackers to gain complete control over
vulnerable VPN servers/firewalls and all data contained therein. Successful
exploitation of this vulnerability could also be used to gain unauthorized
access to networks being protected by vulnerable VPN/firewall products. 
default configurations.
 

For the complete X-Force Protection Alert, please visit: 
http://xforce.iss.net/xforce/alerts/id/181


______

Internet Security Systems, Inc. (ISS) is the trusted expert to global
enterprises and world governments, providing products and services
that protect against Internet threats. An established world leader
in security since 1994, ISS delivers proven cost efficiencies and
reduces regulatory and business risk across the enterprise for
more than 11,000 customers worldwide. ISS products and services
are based on the proactive security intelligence conducted by ISS?
X-Force® research and development team ? the unequivocal world
authority in vulnerability and threat research. Headquartered
in Atlanta, Internet Security Systems has additional operations
throughout the Americas, Asia, Australia, Europe and the Middle East.

Copyright (c) 2004 Internet Security Systems, Inc. All rights reserved
worldwide.

This document is not to be edited or altered in any way without the
express written consent of Internet Security Systems, Inc. If you wish
to reprint the whole or any part of this document, please email
xforce@xxxxxxx for permission. You may provide links to this document
from your web site, and you may make copies of this document in
accordance with the fair use doctrine of the U.S. copyright laws. 

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: 
xforce@xxxxxxx of Internet Security Systems, Inc.


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