ISS Protection Brief: Cisco VoIP Call Manager Remote Compromise

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Internet Security Systems Protection Brief
July 13, 2005

Cisco VoIP Call Manager Remote Compromise

Summary:

ISS has shipped protection for a flaw X-Force has discovered in Cisco's
Call Manager platform. Call Manager is the software-based call processing
component of Cisco's Voice Over IP (VoIP) infrastructure, and is a
critical
component in any Cisco VoIP deployment. By sending specially-crafted
packets,
an attacker is able to trigger a heap overflow within a critical Call
Manager process, causing both a denial of service condition and enabling
an attacker to completely compromise the Call Manager server.

Business Impact:

Compromise of Cisco VoIP networks and machines may lead to exposure
of confidential information, loss of productivity, and further
network compromise. An attacker may be able to redirect calls or
perform eavesdropping as a result of this compromise. Successful
exploitation of this vulnerability could be used to gain unauthorized
access to networks and machines with Cisco VoIP products. No
authentication is required for an attacker to leverage this
vulnerability to compromise a network. Cisco Call Manager
implementations are vulnerable in their default configurations.

For the complete X-Force Protection Advisory, please visit:
http://xforce.iss.net/xforce/alerts/id/200

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) 2005 Internet Security Systems, Inc. All rights reserved
worldwide.

This document is not to be edited or altered in any way without the
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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:
xforceiss.net of Internet Security Systems, Inc.

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