CERT/CC Vulnerability Note VU#749342

Overview

A number of vulnerabilities have been discovered in various implementations of the multimedia telephony protocols H.323 and H.225. Voice over Internet Protocol (VoIP) and video conferencing equpiment and software can use these protocols to interoperate over a variety of computer networks. The majority of the vulnerabilities discovered are limited to denial of service impacts; however, several may allow unauthorized code execution.

Description

The U.K. National Infrastructure Security Co-ordination Center (NISCC) has reported multiple vulnerabilities in different vendor implementations of the multimedia telephony protocols H.323 and H.225. H.323 and H.225 are international standard protocols, published by the International Telecommunications Union, used to facilitate communication among telephony and multimedia systems. An example of such a system includes VoIP or video-conferencing equipment and software deployed on a network or computer. Sending an exceptional ASN.1 element to a vulnerable telephony component that cannot handle it may cause the application or system behavior to become unpredictable.

A test suite developed by NISCC has exposed vulnerabilities in a variety of H.323/H.225 implementations. While most of these vulnerabilities exist in ASN.1 parsing routines, some vulnerabilities may occur elsewhere. Due to the general lack of specific vulnerability information, this document covers multiple vulnerabilities in different H.323/H.225 implementations. Information about individual vendors is available in the Systems Affected section.

The U.K. National Infrastructure Security Co-ordination Centre is tracking this vulnerability as NISCC/006489/H.323.

Impact

The impacts associated with these vulnerabilities include denial of service, and potential execution of arbitrary code.

Solution

Patch or Upgrade

Apply a patch or upgrade as appropriate. Information about specific vendors is available in the Systems Affected section of this document.

One potential workaround includes making sure ports 1720/tcp and 1720/udp are blocked on network perimeters.

Vendor Information

749342

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Check Point Affected

Cisco Systems, Inc. Affected

Hewlett-Packard Company Affected

Notified: January 12, 2004 Updated: April 05, 2004

Statement Date: January 13, 2004

Status

Affected

Vendor Statement

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

HP SECURITY BULLETIN

HPSBGN01004 REVISION: 0

SSRT3614 - HP OpenCall Multiservice Controller (OCMC) DoS
(Denial of Service)

- --------------------------------------------------------------
NOTICE: There are no restrictions for distribution of this
Bulletin provided that it remains complete and intact.

The information in this Security bulletin should be
acted upon as soon as possible.

INITIAL RELEASE: 25 March 2004

POTENTIAL SECURITY IMPACT: Remote Denial of Service (DoS)

SOURCE: HEWLETT-PACKARD COMPANY
HP Software Security Response Team

REFERENCES: CERT CA-2004-01, CISCO Advisory 47843

VULNERABILITY SUMMARY:

A potential security vulnerability has been identified in the
HP OpenCall MultiService Controller (OCMC) H.323 stack that may
allow a remote user to create a Denial of Service (DoS).

SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed.

All versions HP OCMC v1.2 and HP OCMC v1.1 for HP-UX 11.0

BACKGROUND:
The HP Software Security Response team has contacted
the source and various other vendors and is not aware
of any malicious exploitation of any of the vulnerabilities
described in this bulletin.

A test suite developed by the U.K. National Infrastructure
Security Co-ordination Centre (NISCC) and the University of
Oulu Security Programming Group (OUSPG) has exposed
vulnerabilities in several implementations of the H.323
protocol.

The potential vulnerabilities may be exploited to produce a
denial of service (DoS) attack. Such an attack may cause an
affected product to failover or crash and failover. Due to
its robust design OCMC will recover from most attack scenarios.
In the event that OCMC does not recover, the attack can be
stopped by blocking the offending IP address. Attacks may also
be blocked by creating an access list to restrict TCP port 1720
traffic to known, trusted IP addresses.

RESOLUTION:

HP will be providing patches to the impacted versions of OCMC:

OCMC v1.2 released January 2004
OCMC v1.1 patch 46
OCMC v1.1 patch 37

This bulletin will be revised as the patches become available
and patches will be available from the normal HP Services
support channel.

Please write to security-alert@hp.com to request a PGP signed
version of this bulletin.

BULLETIN REVISION HISTORY: N/A

* The software product category that this Security Bulletin
relates to is represented by the 5th and 6th characters of
the Bulletin number: GN=General, MA=Management Agents,
MI=Misc. 3rd party, MP=HP-MPE/iX, NS=HP NonStop Servers,
OV=HP OpenVMS, PI=HP Printing & Imaging, ST=HP Storage,
TU=HP Tru64 UNIX, TL=Trusted Linux, UX=HP-UX,
VV=VirtualVault

SUPPORT: For further information, contact HP Services support
channel.

SUBSCRIBE: To initiate a subscription to receive future HP
Security Bulletins via Email:
http://h30046.www3.hp.com/driverAlertProfile.php
+?regioncode=NA&langcode=USENG&jumpid=in_SC-GEN__driver
+ITRC&topiccode=ITRC

On the web page: Driver and Support Alerts/Notifications Sign-up:
Product Selection
Under Step1: your products
1. Select product category: - a minimum of servers must be
selected.
2. Select product family or search: - a minimum of one product
must be selected.
3. Add a product: - a minimum of one product must be added.

In Step 2: your operating system(s) - check ALL operating systems
for which alerts are required.

Complete the form and Save.

To update an existing subscription:
http://h30046.www3.hp.com/subSignIn.php
Log in on the web page Subscriber's choice for Business: sign-in.
On the Web page: Subscriber's Choice: your profile summary - use
Edit Profile to update appropriate sections.

Note: In addition to the individual alerts/notifications for the
selected operating systems/products, subscribers will
automatically receive one copy of alerts for non-operating
system categories (i.e., a subscriber who signs up for all
six operating system alerts will only receive one copy of
all the non-operating system alerts).

REPORT: To report a potential security vulnerability with any HP
supported product, send email to: security-alert@hp.com

Please encrypt any exploit information using the
security-alert PGP key, available from your local key
server, or by sending a message with a -subject- (not body)
of 'get key' (no quotes) to security-alert@hp.com.

System management and security procedures must be reviewed
frequently to maintain system integrity. HP is continually
reviewing and enhancing the security features of software
products to provide customers with current secure solutions.

"HP is broadly distributing this Security Bulletin in order
to bring to the attention of users of the affected HP products
the important security information contained in this Bulletin.
HP recommends that all users determine the applicability of this
information to their individual situations and take appropriate
action. HP does not warrant that this information is necessarily
accurate or complete for all user situations and, consequently,
HP will not be responsible for any damages resulting from user's
use or disregard of the information provided in this Bulletin.
To the extent permitted by law, HP disclaims all warranties,
either express or implied, including the warranties of
merchantability and fitness for a particular purpose, title and
non-infringement."

(c) Copyright 2004 Hewlett-Packard Development Company, L.P.
Hewlett-Packard Company shall not be liable for technical or
editorial errors or omissions contained herein. The information
provided is provided "as is" without warranty of any kind.
To the extent permitted by law, neither HP or its affiliates,
subcontractors or suppliers will be liable for incidental,
special or consequential damages including downtime cost; lost
profits; damages relating to the procurement of substitute
products or services; or damages for loss of data, or software
restoration. The information in this document is subject to
change without notice. Hewlett-Packard Company and the names
of Hewlett-Packard products referenced herein are trademarks
of Hewlett-Packard Company in the United States and other
countries. Other product and company names mentioned herein may
be trademarks of their respective owners.

-----BEGIN PGP SIGNATURE-----
Version: PGP 8.0

iQA/AwUBQGODguAfOvwtKn1ZEQKPOwCgwM8MHxb77zJ2KF2Lt+njDsQP8o4AoOSF
aJmHSec0C1WcBO4DilLHgf2r
=k72z
-----END PGP SIGNATURE-----

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

Addendum

Please also see NISCC Vulnerability Advisory 006489/H323 at http://www.uniras.gov.uk/vuls/2004/006489/h323.htm.

Per NISCC Vulnerability Advisory 006489/H323 Rev 1.1:

Hewlett-Packard

At the time of writing this document, HP is currently investigating the potential impact to HP's released Operating System software products.

As further information becomes available HP will provide notice of the availability of any necessary patches through standard security bulletin announcements and be available from your normal HP Services support channel.

To report potential security vulnerabilities in HP software, send an E-mail message to: security-alert@hp.com.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Intel Affected

Microsoft Corporation Affected

Nortel Networks, Inc. Affected

Polycom Affected

RadVision Affected

TandBerg Affected

Apple Computer, Inc. Not Affected

Clavister Not Affected

Cyberguard Not Affected

Foundry Networks Inc. Not Affected

Hitachi Not Affected

NetBSD Not Affected

NetScreen Not Affected

Objective Systems Inc. Not Affected

Red Hat, Inc. Not Affected

Sun Microsystems, Inc. Not Affected

Symantec Corporation Not Affected

Tumbleweed Communications Corp. Not Affected

Xerox Not Affected

eSoft Not Affected

uniGone Not Affected

3Com Unknown

AT&T Unknown

Alcatel Unknown

Avaya Unknown

Berkeley Software Design, Inc. Unknown

Borderware Unknown

Computer Associates Unknown

D-Link Systems Unknown

Debian Linux Unknown

EMC Corporation Unknown

Engarde Unknown

Extreme Networks Unknown

F5 Networks, Inc. Unknown

FreeBSD, Inc. Unknown

Fujitsu Unknown

Global Technology Associates Unknown

IBM eServer Unknown

IBM-zSeries Unknown

Ingrian Networks, Inc. Unknown

Intoto Unknown

Juniper Networks, Inc. Unknown

Lachman Unknown

Linksys Unknown

Lotus Software Unknown

Lucent Technologies Unknown

Mandriva, Inc. Unknown

Mitel Networks Unknown

Updated: February 10, 2004

Statement Date: January 16, 2004

Status

Unknown

Vendor Statement

Not vulnerable, with the possible exception of the 5700 Voice First videoconferencing solution and associated video endpoints. Those video products are still under investigation. Mitel Networks Security Advisory MNSA-2004-001 has been issued and distributed to Mitel resellers to address these concerns. Please report any security concerns with Mitel Networks products to "security@mitel.com".

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

Addendum

This statement has been mirrored at http://www.uniras.gov.uk/vuls/2004/006489/h323.htm#Mitel

An additional copy of the Mitel Networks advisory is available here

- - --------------------------------------------------------- Mitel Networks Security Advisory MNSA-2004-001: Vulnerability Reports in H.323 Implementations Synopsis: Interim Statement About Vulnerability Reports in H.323 Implementations Advisory: MNSA-2004-001 Release Date: 2004-01-16 Last Revised: 2004-01-16 Severity: Important Impact: See below Affected Products: See below 1. SUMMARY On Tuesday, January 13th, advisories were issued by the UK National Infrastructure Security Co-Ordination Centre and the CERT Coordination Center about potential vulnerabilities in multiple implementations of the H.323 protocol used for some Voice-over-IP and videoconferencing products. Exploitation of these vulnerabilities could potentially result in a denial-of- service attack or remote code execution. At the current time Mitel Networks has determined that all of its VoIP products are NOT vulnerable as they do not make use of the H.323 protocol. However, we are still investigating whether or not a potential vulnerability exists with the following videoconferencing products: * 5700 Voice First Solution * 5750 Desktop Video Appliance * 5760 Videoconference Appliance This advisory will be updated when the results of that investigation are complete. 2. RECOMMENDATION Until the investigation can be completed Mitel Networks recommends that administrators of sites with the 5700 Voice First Solution follow the workaround suggested in the CERT advisory of applying network filters to block access to H.323 services at network borders to minimize any potential denial-of-service attacks originating outside your network. Please see the CERT advisory (URL below) for more information. 3. DESCRIPTION No vulnerability has yet been identified. If a vulnerability is found, the description will appear here. 4. AFFECTED PRODUCTS As noted above, the only Mitel Networks products still under investigation are: * 5700 Voice First Solution * 5750 Desktop Video Appliance * 5760 Videoconference Appliance It is important to note that no vulnerability has yet been found in these products and they are still under active investigation. 5. REFERENCES For more information about this potential vulnerability, see: http://www.uniras.gov.uk/vuls/2004/006489/h323.htm http://www.cert.org/advisories/CA-2004-01.html6. REVISION HISTORY V1.0 - 16 January 2004 - Initial interim statement 7. CONTACT INFORMATION For questions relating to Mitel Networks products, please contact the Mitel Networks Product Support organization appropriate for your geographic region. If you believe you have found a security issue with a Mitel Networks product, please e-mail: security@mitel.com Mitel Networks Product Security Team PGP Key ID: 000492A6 Fingerprint: 1AF0 1058 6DD8 6A18 4032 84B7 4223 5A3B 0004 92A6 Copyright 2004 Mitel Networks Corporation - - ---------------------------------------------------------

If you have feedback, comments, or additional information about this vulnerability, please send us email.

MontaVista Software, Inc. Unknown

Multi-Tech Systems Inc. Unknown

NEC Corporation Unknown

Netfilter Unknown

Network Appliance Unknown

Nokia Unknown

Novell, Inc. Unknown

OpenBSD Unknown

Openwall GNU/*/Linux Unknown

Oracle Corporation Unknown

Riverstone Networks Unknown

SUSE Linux Unknown

Secure Computing Corporation Unknown

SecureWorks Unknown

Sequent Computer Systems, Inc. Unknown

Sony Corporation Unknown

Stonesoft Unknown

TurboLinux Unknown

Unisys Unknown

WatchGuard Unknown

Wind River Systems, Inc. Unknown

Wirex Unknown

ZyXEL Unknown

View all 75 vendors View less vendors

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

Acknowledgements

The CERT Coordination Center thanks the NISCC Vulnerability Management Team and the University of Oulu Security Programming Group OUSPG for coordinating the discovery and release of the technical details of this issue.

This document was written Jeffrey S. Havrilla based on information from NISCC.

Other Information

CVE IDs:	CVE-2003-0819
CERT Advisory:	CA-2004-01
Severity Metric:	13.67
Date Public:	2003-01-13
Date First Published:	2004-01-13
Date Last Updated:	2009-07-29 18:55 UTC
Document Revision:	43

Software Engineering Institute

CERT Coordination Center

Multiple vulnerabilities in H.323 implementations

Vulnerability Note VU#749342

Overview

Description

Impact

Solution

Vendor Information

Check Point Affected

Cisco Systems, Inc. Affected

Hewlett-Packard Company Affected

Intel Affected

Microsoft Corporation Affected

Nortel Networks, Inc. Affected

Polycom Affected

RadVision Affected

TandBerg Affected

Apple Computer, Inc. Not Affected

Clavister Not Affected

Cyberguard Not Affected

Foundry Networks Inc. Not Affected

Hitachi Not Affected

NetBSD Not Affected

NetScreen Not Affected

Objective Systems Inc. Not Affected

Red Hat, Inc. Not Affected

Sun Microsystems, Inc. Not Affected

Symantec Corporation Not Affected

Tumbleweed Communications Corp. Not Affected

Xerox Not Affected

eSoft Not Affected

uniGone Not Affected

3Com Unknown

AT&T Unknown

Alcatel Unknown

Avaya Unknown

Berkeley Software Design, Inc. Unknown