Hewlett-Packard Company Information for VU#749342

Multiple vulnerabilities in H.323 implementations



Vendor Statement

Hash: SHA1



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

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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)

HP Software Security Response Team

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


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

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

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.


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.


* 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,

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"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.
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(c) Copyright 2004 Hewlett-Packard Development Company, L.P.
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of Hewlett-Packard products referenced herein are trademarks
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countries. Other product and company names mentioned herein may
be trademarks of their respective owners.

Version: PGP 8.0


Vendor Information

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

Vendor References



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:


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.